Auditory Biofeedback through Wind Instrument Training: A Breath-Controlled Acoustic Strategy for Modulating Anxiety and Sleep

Abstract

Anxiety and sleep disturbances frequently coexist due to common autonomic dysregulation. This review emphasises wind-instrument training as an intervention that integrates intentional breath regulation with self-produced auditory feedback to influence vagal tone and maintain arousal stability. We performed a systematic review and mechanistic analysis, querying PubMed, Embase, PsycINFO and the Cochrane Library (2000–2024) for clinical and experimental studies on wind-instrument training, and synthesised pathways connecting respiration, auditory processing and autonomic regulation. Initial evidence indicates a decrease in anxiety symptoms, enhancements in heart-rate variability and a reduction in nocturnal awakenings; nevertheless, the majority of studies are limited in size and duration, necessitating larger multi-centre trials. Incorporating wind-instrument practice into therapeutic frameworks may enhance existing non-pharmacological strategies by aligning respiratory pacing with consistent and self-produced sound, providing a physiological mechanism for improved emotional regulation and sleep.

KEY MESSAGES

• (1)Wind instrument training and vocal therapies demonstrate potential in enhancing sleep quality and mitigating symptoms of obstructive sleep apnoea.
• (2)These interventions can serve as valuable non-pharmacological therapies, particularly in resource-constrained environments.
• (3)Future research should prioritise the accumulation of supplementary data and the execution of systematic reviews to enhance the evidentiary foundation.

INTRODUCTION

Anxiety and sleep disturbances often coexist and are closely linked through autonomic dysregulation.[1,2,3] Comprehensive epidemiological evidence suggests that individuals with chronic anxiety frequently encounter difficulties in initiating or sustaining restorative sleep at night, whereas those afflicted by insomnia often suffer from irritability and concentration deficits during the day, which subsequently exacerbate anxious conditions.[4] Although sedative and anxiolytic medications may provide short-term symptom relief, patients and clinicians express concerns regarding their potential effects on daily rhythms and functioning.[5] Thus, mild and non-pharmacological approaches designed to restore emotional balance and promote healthy sleep in harmony with natural bodily processes have attracted considerable interest.[6] The regulatory function of sound has played a pivotal role in diverse non-pharmacologic strategies. Historically, research has focused on how environmental noise disrupts autonomic stability and heightens sympathetic arousal, often overlooking the potential therapeutic benefits of self-generated sound. In addition to physical vibrations reaching the cochlea, self-generated sound can influence the brain’s assessment of safety and threat, modulating autonomic output through limbic–brainstem networks. This auditory influence seldom functions independently; it is closely linked to respiratory patterns. Respiratory rhythms inherently align with heart rate variability (HRV), and deliberate, gradual breathing can enhance vagal tone.[7] When sound produced by breath is processed by auditory and emotion-related centres, it may establish a functional model of a ‘breath–sound integration’ pathway that modulates arousal and autonomic outflow.[8]

Among these sound-based approaches, wind instrument training (e.g., harmonica, flute, saxophone, clarinet, oboe, bassoon, trumpet and didgeridoo) is notably exceptional. In a randomised controlled trial conducted in Switzerland (spanning 4 months of classes with home practice), the intervention group exhibited more considerable enhancements than the control group in daytime sleepiness scores and the apnoea–hypopnoea index (AHI), reduced nocturnal disturbances were observed.[9] In contrast to passive music listening or silent meditation, wind instrument training intricately integrates intentional breath regulation, active sound production and instantaneous auditory feedback.[10,11] Individuals become highly conscious of each complete inhalation, subsequently directing a regulated exhalation to generate tones via the instrument, converting every breath into a tangible waveform that their auditory system perceives. This closed-loop experience enables individuals to perceive the airflow in their chest and audibly hear their own breath, subtly enhancing their sense of control over their physiological state. This feature may elucidate why numerous studies indicate that even brief and regular practice of wind instruments can reduce nocturnal awakenings and lower subjective anxiety scores. For individuals seeking to restore a consistent harmony between mind and body, such practices may function as modest yet profoundly effective catalysts. Slow, and paced breathing enhances vagal activity, and consistent auditory stimuli can stabilise arousal and maintain sleep continuity.[12,13] By contrast, the effects specific to instruments, dose–response parameters and the longevity of benefits from wind instrument training remain hypotheses requiring large and standardised trials.

LITERATURE REVIEW AND CRITICAL ANALYSIS OF WIND INSTRUMENT TRAINING FOR ANXIETY AND SLEEP

We conducted a systematic review and mechanistic analysis of wind-instrument training for anxiety, sleep and autonomic regulation. Searches were performed in PubMed, Embase, PsycINFO and the Cochrane Library from 1 January 2000 to 31 August 2024. Primary search terms integrated controlled vocabulary and free text related to wind instruments and autonomic/sleep outcomes (e.g. ‘wind instrument’, ‘didgeridoo’, ‘harmonica’, ‘flute’, ‘breath control’, ‘auditory biofeedback’, ‘anxiety’, ‘sleep’ and ‘heart rate variability/HRV’). No filters pertaining to study design were implemented during the search phase. Eligibility criteria were pre-defined using PICOS and are summarised in Table 1.

Table 1.

PICOS criteria and eligibility used in this review

Domain	Criteria
Population	Adults or adolescents; healthy volunteers or individuals with anxiety, insomnia/sleep disturbance, mild OSA/snoring
Intervention	Wind instrument training/breath-controlled sound production (e.g., didgeridoo, harmonica, flute, clarinet/saxophone/oboe/bassoon and trumpet); structured lessons, supervised practice or standardised home programs
Comparator	Inactive/usual care; mindful breathing; passive listening/white noise; within-subject baseline
Outcomes	Anxiety scales; sleep measures (subjective sleep quality, sleep-onset latency, awakenings, PSG indices incl. AHI/snoring); autonomic indices (HRV/RSA, heart rate, respiratory rate); feasibility/adherence
Study design	Randomised or non-randomised controlled trials; crossover trials; pre–post interventional human studies; mechanistic human laboratory studies
Exclusion	Non-human studies; n < 5 case reports; editorials/reviews/theory only; passive listening only (no active sound production); non-wind interventions (e.g., strings/keyboard only); insufficient outcome reporting

Note (scope): Eligibility targets active, breath-driven sound; background/mechanistic sources cited elsewhere are not counted in the evidence set; Abbreviations: AHI, apnoea–hypopnoea index; HRV, heart-rate variability; OSA, obstructive sleep apnoea; PSG, polysomnography; RSA, respiratory sinus arrhythmia.

The inclusion criteria encompassed studies involving adults or adolescents with interventions focused on wind instrument training aimed at anxiety, sleep or autonomic regulation. These studies should include clinical trials; randomised controlled trials or experimental designs; featuring explicit intervention protocols, evaluation standards and data reporting standards. Studies that did not pertain to wind instruments or similar breathing training and non-clinical or non-experimental studies, including theoretical discussions or case reports, were excluded. Additionally, studies with inadequate data or defective methodologies were excluded. A critical analysis of the literature reveals that numerous studies are based on the theoretical framework of autonomic regulation. These studies suggest that training with wind instruments, through breath control and auditory feedback, influences vagal activity and potentially ameliorates anxiety and improves sleep. However, these theories are supported by preliminary research only, and no large-scale multi-centre validation studies have corroborated these findings. Methodologically, current studies indicate the substantial effects of wind instrument training on anxiety and sleep, but they have small sample sizes and short intervention durations. These limitations reduce the generalisability of their findings. Furthermore, variations in measurement instruments and research design complicate the comparison of findings across studies. A critical issue persists regarding the lack of consensus on the optimal dosage of intervention, encompassing the duration of daily practice, frequency and intervention period required to yield substantial benefits. Moreover, most studies have focused on short-term outcomes, neglecting the long-term effects of wind instrument training. Subsequent research should examine the long-term effects of this intervention on anxiety, sleep quality and autonomic regulation. Another challenge is the considerable heterogeneity within the study populations. Variations in responses to wind instrument training indicate that future research should aim to comprehend and address these variations.

In conclusion, although wind instrument training demonstrates potential as a non-pharmacological intervention for anxiety and sleep disorders, the evidence is predominantly derived from small-scale preliminary studies. Extensive, multi-centre and long-term randomised controlled trials are needed to verify these effects. Furthermore, research should focus on exploring the physiological mechanisms underlying this training, particularly how self-generated sounds influence autonomic regulation and emotional control.

INTEGRATED MECHANISMS OF AUDITORY SELF-REGULATION AND NEURAL HEARING PATHWAYS

Sound functions as a potent instrument for modulating emotions and physiological rhythms, directly affecting emotional reactions and physiological processes.[14] Sound produces quantifiable impacts on emotion and physiology; soothing acoustic rhythms can diminish perceived tension and affect physiological metrics such as heart rate and respiration.[15,16] The predictability and fluidity of external sounds primarily influence the brain’s classification of them as indicators of safety or potential threat.[17] Consistently predictable, gradually changing acoustic stimuli often align with an individual’s respiratory and cardiac rhythms, thus enhancing arousal stability and facilitating the onset of sleep.[18] Furthermore, the perception of control over sound can effectively alleviate the nervous system’s hyperarousal response to uncertainty.[19] For instance, sounds generated during active instrument performance provide a completely predictable, self-regulated auditory stimulus that can mitigate stress responses.[20] Auditory information is conveyed from the cochlea via the auditory nerve to the primary brainstem nuclei, such as the cochlear nucleus and inferior colliculus, subsequently ascending to the medial geniculate body of the thalamus before arriving at the primary auditory cortex in the temporal lobe.[21] However, this pathway is neither exclusively unidirectional nor confined to auditory recognition. Auditory signals at the brainstem level interact with cardiovascular and respiratory centres, sending collateral projections that directly affect the reticular formation and vagal nuclei, thereby contributing to autonomic regulation.[22] Auditory inputs are rapidly transmitted to cortical and subcortical regions, including the amygdala, hippocampus and anterior cingulate cortex, which are crucial for encoding emotional memories and modulating stress responses.[23,24] Acoustic signals generally enter through the peripheral auditory system and are processed in the brainstem and higher centres, where they engage with emotional and autonomic regulatory processes.[25] This process can regulate the over-activation of the hypothalamic–pituitary–adrenal axis, alleviating its effects on autonomic function and preserving physiological balance. However, although some studies suggest that wind instrument training does not markedly influence HRV, various factors may elucidate these inconsistencies. A potential explanation is the length of the intervention; shortened training sessions may insufficiently allow for quantifiable alterations in HRV. The heterogeneity of the populations in these studies, such as differences between healthy individuals and those with anxiety or sleep disorders, may contribute to variations in outcomes.[26] Additional research with extended intervention durations and homogeneous participant cohorts is needed to clarify these issues and enhance understanding of the comprehensive effects of wind instrument training on HRV and autonomic function.

Wind instrument training is crucial for regulating breathing rhythms and strengthening the upper airway muscles.[10] The mechanism can be encapsulated as a multi-path physiological regulation network, denoting the coordinated interaction among the respiratory system (paced breathing and upper-airway activation), auditory pathways (cochlea–brainstem–cortex), autonomic circuits (vagal and associated brainstem nuclei; HRV) and limbic/emotional control. This integration of auditory feedback, motor control and physiological rhythm modulation culminates in a comprehensive regulatory system [Figure 1].[12,23,25,27,28] Music functions as both an emotional regulation mechanism and a physiological metronome that aligns respiratory rhythms and heart rate. Research indicates that tranquil, measured melodies significantly reduce breathing rates and encourage more consistent respiratory patterns.[29,30] Synchronisation across systems is termed the ‘entrainment’ effect, which has widespread applications in medical psychology.[16,17,21] In essence, when playing wind instruments, the sound generated during exhalation creates a closed-loop regulatory system. The sound waves produced by breathing traverse auditory and autonomic circuits, further modulating breathing and cardiac activity.[31]

Figure 1.

Multi-mechanism intervention pathways of wind instrument training based on breathing rhythm control and upper airway muscle strengthening.

Note: Legend. Arrows indicate proposed information flow: respiratory control (paced inhalation → prolonged exhalation) → acoustic output (self-generated tone) → auditory pathway (cochlea → brainstem nuclei → auditory cortex) with limbic appraisal (amygdala/anterior cingulate) → autonomic regulation (vagal efferents/HRV stabilisation) → reduced arousal/anxiety and improved sleep continuity; parallel pathway: upper-airway muscle training → reduced collapsibility and snoring risk in susceptible individuals. Abbreviations: HRV, heart-rate variability; OSA, obstructive sleep apnoea. Suggested labels on the diagram: ‘Breath control’, ‘Self-generated sound’, ‘Auditory–limbic processing’, ‘Vagal/HRV’, ‘Upper-airway tone’ and directional arrows linking each node.

This regulatory system not only mitigates respiratory and cardiovascular strain but also with consistent practice, fundamentally alters autonomic function, improving self-regulatory capacities.[32] This intricate coupling mechanism elucidates why practicing wind instruments, such as the flute or harmonica, can effectively alleviate anxiety and enhance sleep quality, frequently surpassing the advantages of basic slow breathing exercises.[25,33] Integrating auditory feedback and physiological rhythm modulation in wind instrument training offers a distinctive method for restoring emotional and autonomic equilibrium.

The interplay between auditory and respiratory pathways in wind instrument training creates a highly synchronised physiological network. By actively regulating breathing rhythms, players optimise their respiration while synchronising heart rate and neural activity. This process not only alleviates anxiety and improves sleep quality but also modifies autonomic function through consistent practice. Furthermore, the physiological effects of wind instrument training are intricately linked to its profound influence on the brain and nervous system. The auditory feedback produced while playing is relayed to the brain’s emotional regulation regions, including the amygdala and anterior cingulate cortex, thereby substantially influencing emotional states and stress responses. By enhancing this self-regulatory auditory input, wind instrument training serves as an effective means for emotional regulation, improving sleep quality and promoting overall physiological well-being. Figure 2 illustrates the potential courses of action.

Figure 2.

Mechanistic pathways by which wind instrument training improves autonomic function and sleep quality.

Note: Breath control (paced inhalation and prolonged exhalation), self-generated sound, auditory–limbic processing (amygdala/anterior cingulate) and autonomic regulation (vagal efferents/heart rate variability [HRV]. These pathways reduce arousal and anxiety while improving sleep continuity. Abbreviation: HRV, heart rate variability.

In summary, wind instrument training integrates auditory self-regulation, control of breathing rhythms and modulation of autonomic functions to create a sophisticated and efficient physiological regulatory network, offering an innovative method in contemporary medicine, especially in the regulation of psychological well-being and physiological balance.

EVIDENCE FROM CLINICAL AND EXPERIMENTAL STUDIES

Wind Instrument Training for Anxiety Relief

Research on wind instrument training for anxiety relief has primarily focused on how this practice engages both respiratory and auditory pathways, offering a unique route for emotional regulation. In limited studies involving adolescents, instrumental and music-based practice has been associated with reduced attack-related fear and enhanced emotional security.[34,35] In contrast to basic slow-breathing exercises, wind instrument training transforms exhalation into a discernible and manageable output. This sound is processed through auditory circuits and transmitted to brain regions associated with emotion regulation, offering the individual a more distinct internal signal of consistent breathing. Researchers suggest that self-generated sounds serve as discernible safety signals, mitigating excessive sympathetic activity and alleviating hypervigilant states.[36] Although preliminary studies indicate favorable outcomes, they frequently involve limited sample sizes and may not adequately reflect the enduring effects of wind instrument training on anxiety. Furthermore, many studies lack diverse population samples and may fail to consider individual differences in response to auditory feedback.

Wind Instrument Training for Sleep and Sleep-Related Arousal

Training with wind instruments has demonstrated potential in enhancing sleep quality. Sleep research has long acknowledged that individuals entering sleep undergo a phase characterised by a transition from heightened alertness to low-frequency brain activity, a stage particularly susceptible in those with insomnia, where even minor disturbances can disrupt sleep onset. Research on music and sleep suggests that low-frequency, continuous and predictable sound waves function as neural pacers, facilitating faster sleep onset.[37] Although clinical studies directly examining the effects of wind instrument performance on sleep architecture are scarce, an Australian study focused on didgeridoo training provides compelling insights. In a randomised controlled trial (n = 25; 4 months of lessons plus daily home practice), participants engaged in practice for an average of approximately 5.9 days per week for 25 minutes per day, demonstrating more considerable improvements than the control group in daytime sleepiness (Epworth Sleepiness Scale: between-group difference −3.0 points, 95% CI −5.7 to −0.3; P = 0.03) and AHI (difference −6.2 events per hour, 95% CI–12.3 to −0.1; P = 0.05), with partners reporting reduced sleep disturbance.[9] Participants with moderate obstructive sleep apnoea (OSA) who completed 4 months of training exhibited substantial decreases in their AHI and reported a reduction in micro-arousals during overnight electroencephalography (EEG) monitoring. Researchers posited that the low-frequency resonances produced during evening practice and nocturnal respiration functioned as subtle auditory anchors, facilitating more seamless transitions between sleep stages.[38] Despite its promise, the evidence base is limited in both size and duration, constraining generalisability. Moreover, the study’s duration was restricted, leaving the long-term effects on sleep quality and apnoea severity ambiguous. These findings indicate that daytime practice influences sleep-related arousal (e.g., diminished startle response to nocturnal noise) through a continuous ‘sound–breath’ feedback loop, thereby extending effects throughout the sleep–wake cycle. Recent studies indicate that daytime training with wind instruments may assist individuals with mild auditory hypersensitivity during sleep, particularly regarding increased sensitivity to abrupt sounds. Training facilitates the formation of a consistent ‘sound-breath’ feedback loop, mitigating heightened startle responses during nocturnal hours.[39] This feature suggests that auditory rhythms exert a cross-phase effect, contributing to neural regulation throughout the sleep–wake cycle. Research on the interaction between these auditory rhythms and the complete sleep–wake cycle is scarce, especially concerning individuals with diverse sleep disorders. The generalisability of findings from small and non-randomised studies remains uncertain. Notably, post-intervention durability and its carryover effects during periods without active practice were not assessed, and long-term effects remain uncertain.

Differential Neural Effects of Wind Instruments

The neural effects of different types of wind instruments, including low-frequency instruments like the didgeridoo and high-frequency instruments, such as the flute, may differ because of their sound frequencies and corresponding breathing techniques.[9] The didgeridoo’s low-frequency sound may significantly influence autonomic regulation, facilitating relaxation and alleviating stress via vagal activation. Conversely, the elevated frequencies of the flute may exert a more invigorating influence, possibly activating the auditory system differently, resulting in unique emotional and physiological reactions. Although certain studies indicate that lower-frequency instruments might exert more significant effects on autonomic regulation, these conclusions are tentative, necessitating additional research to elucidate the impact of various instruments on neural mechanisms associated with emotional regulation and autonomic equilibrium. Low-frequency, gradually fluctuating tones are likely to synchronise respiration in the ∼0.1 Hz range and enhance respiratory sinus arrhythmia and vagal modulation, consistent with frequency-dependent HRV effects observed during structured vocalisation or singing. By contrast, high-frequency or rapidly modulated tones during performance may correlate with increased arousal and diminished HRV under stress, signifying a task- and frequency-dependent autonomic reaction. These patterns align with reports indicating that low-frequency droning, such as that produced by the didgeridoo, may promote autonomic down-regulation and confer upper-airway training advantages pertinent to sleep-disordered breathing. From a physiological perspective, low-frequency droning and slower rhythms are more conducive to autonomic down-regulation, whereas higher-frequency or rapidly modulated tasks under performance load may correlate with increased arousal. These are hypothesis-driven inferences that necessitate testing under standardised protocols.[9,40] Collectively, these findings indicate that instrument-specific acoustic spectra and respiratory requirements may variably engage autonomic pathways, necessitating standardised protocols to examine frequency-range effects across instruments.

Comparison with Other Interventions: Wind Instrument Training Versus Mindful Breathing and White Noise

In addition to wind instrument training, other non-pharmacological methods, including mindful breathing and white noise exposure, are frequently employed to mitigate anxiety and enhance sleep quality. Mindful breathing, defined by a deliberate tempo and concentrated awareness, is linked to increased vagal activity.[8] White noise predominantly enhances subjective sleep through environmental masking and acoustic stabilisation. Comparative evidence is scarce, and effects must be interpreted with caution.[41,42] Wind instrument training integrates auditory feedback with regulated breathing to manage autonomic function and emotional states, whereas mindful breathing emphasises deliberate, slow breath patterns to stimulate the parasympathetic nervous system. Conversely, white noise is frequently employed to obscure environmental disruptions and establish a neutral auditory atmosphere, facilitating relaxation and enhancing sleep quality. Research indicates that training with wind instruments can markedly diminish anxiety and enhance HRV, providing a holistic regulation of physiological and psychological conditions. In contrast to mindful breathing, wind instrument training provides a distinct acoustic biofeedback mechanism: exhalation is transformed into a continuous tone that externalises respiratory regulation instantaneously. Both methodologies converge on vagal up-regulation when respiratory rates are synchronised; however, the instrument introduces task structure (embouchure/fingering) that may enhance pacing consistency and skills-based adherence. Conversely, mindful breathing is easy to implement and requires few resources, promoting its spread in low-resource environments. The rhythmic nature of wind instruments, such as the didgeridoo or flute, may activate auditory pathways that facilitate emotional regulation, differing from the effects of white noise or mindful breathing exercises. Investigating these interventions through extensive randomised controlled trials would elucidate the relative effectiveness of wind instrument training in alleviating stress, enhancing sleep quality and modulating autonomic balance. Table 2 presents a succinct cross-intervention comparison, accompanied by relevant sources, which are listed below each intervention.

Table 2.

Comparative summary of wind instrument training, mindful/slow breathing and white-noise interventions

Intervention	Mechanism of action (keywords)	Evidence level	Target population	Adherence (typical)
Wind instrument training[9,11,43,44]	Active breath control; self-generated auditory biofeedback; upper-airway conditioning; possible ∼0.1 Hz pacing	RCT in OSA; small interventional/feasibility studies	Snoring/mild-moderate OSA; anxiety/sleep complaints; pulmonary rehab adjunct	Moderate-high with lessons + home logs; learning curve; low equipment burden
Mindful/slow breathing [7,45,46,47]	Slow paced breathing (∼0.08–0.12 Hz); vagal up-regulation; HRV resonance; attentional focus	Multiple RCTs; meta-analyses on HRV and symptoms; insomnia crossover data	Anxiety/insomnia; general population; low-resource settings	Variable; improves with app/biofeedback prompts; simple to deploy
White noise/continuous sound[48,49,50]	Broadband masking; acoustic predictability; arousal stabilisation	Systematic reviews; mixed trial results; setting-dependent	Noise-sensitive sleepers; urban/noisy environments; sleep-onset latency	High short-term; long-term variable; device/partner tolerance matters

Abbreviations: HRV, heart-rate variability; OSA, obstructive sleep apnoea; RCT, randomised controlled trial.

In comparing adherence rates, wind instrument training may offer advantages over alternative interventions, such as white noise and mindful breathing. The captivating aspects of learning and playing an instrument can encourage patients to maintain their training, potentially enhancing long-term compliance. Conversely, although mindful breathing is broadly acknowledged, its effect may be challenging to maintain for individuals who require external feedback. White noise exposure can be effective in certain instances but may not actively engage individuals, potentially resulting in diminished adherence over time. The neurophysiological mechanisms that underpin these interventions also vary. Mindful breathing has demonstrated the ability to enhance vagal tone and reduce cortisol levels, contributing to parasympathetic activation. Conversely, training on wind instruments provides a dual mechanism (breath control and auditory feedback) that synergistically influences both vagal and auditory neural pathways. The distinctive integration of auditory feedback and regulated breathing in wind instrument training offers a more cohesive method for stress regulation, while white noise mainly serves to obscure undesirable environmental sounds and deliver a consistent auditory stimulus, which may not activate the autonomic system to the same extent.

Clinical Translation and Implications for Auditory Health Research

In contrast to conventional music therapy, white noise masking or other forms of passive auditory exposure, wind instrument training is distinctive as it enables the individual to actively produce continuous, controllable sounds using their own breath, rather than depending on external stimuli to modulate emotional states. This ‘internal-to-external’ auditory stimulation offers a consistent, self-regulating input stream for the autonomic and limbic systems, rendering it especially attractive in clinical environments. Patients do not necessitate intricate apparatus or specialised environments; a simple harmonica, flute or didgeridoo suffices to create a comprehensive feedback loop encompassing respiration, sound generation, auditory processing and neural regulation. For decades, most research in auditory health has focused on the detrimental effects of external noise on the cochlea and central auditory pathways or the role of environmental sounds and music-based interventions in alleviating such damage. These strategies generally depend on passive exposure and passive acceptance. Conversely, training in wind instruments embodies a fundamentally distinct methodology. It underscores the active production of sound via breath control, converting these self-produced auditory signals into immediate feedback, thereby establishing a dual system of breath and auditory self-regulation.[51] From a scientific standpoint, this signifies a novel approach to the management and recovery from noise-induced disorders. The emphasis transitions from reducing or concealing potentially detrimental external noises to investigating the capacity of self-generated sounds to beneficially influence the reconfiguration of neural networks, converting sounds that may be regarded as threats into self-regulatory assets. This presents new opportunities for research in noise medicine, encouraging further investigation into the impact of self-generated auditory feedback on autonomic function, cortical plasticity and the long-term reconfiguration of sound-associated fear responses.

However, the practical implementation of wind instrument training encounters numerous feasibility obstacles. Cultural acceptability and digital learning curves are recognised but can be succinctly addressed (e.g., practice sessions, community-oriented scheduling and concise onboarding videos). Two immediate avenues warrant attention are as follows: (i) intelligent respiratory sensors (wearable chest or abdominal bands, basic mouthpiece spirometry or smartphone microphone analytics) to measure respiratory rate, exhalation duration, tonal consistency and HRV proxies for feedback-oriented advancement; and (ii) interactive digital platforms that integrate incremental embouchure and fingering tutorials with visual tempo objectives (approximately 0.08–0.12 Hz) and automated compliance tracking. These modules can be integrated into a 4-week to 8-week program alongside standard sleep–hygiene recommendations and concise daytime exercises, facilitating practical implementation and outcome assessment.

Challenges, Limitations and Future Directions

Despite an increasing number of clinical and behavioural studies indicating that wind instrument training may be beneficial for reducing anxiety, improving sleep and enhancing autonomic balance, the existing evidence is still fragmented and frequently relies on limited sample sizes. Numerous studies remain limited to short-term interventions or observational analyses, lacking the multi-centre, large-scale randomised controlled trials with extended follow-up necessary to validate the durability and safety of these effects.[52] In various studies, the primary limitations are non-standardised dosage parameters (session duration, weekly frequency, intervention length) and sample heterogeneity (age, baseline anxiety/sleep severity and type of instruments), which restrict comparability and generalisability; thus, effect sizes should be regarded as preliminary.

Moreover, no consensus on what defines an effective ‘dose’ of such training has been reached, specifically concerning daily practice duration, weekly frequency or the minimum intervention period required to achieve meaningful benefits. Some individuals seem to experience noticeable relief with merely 10 minutes of daily practice, whereas others require extended engagements to achieve consistent physiological adaptations. This variability poses a challenge for future research while simultaneously creating compelling opportunities for scientific exploration of the mechanisms governing individual responsiveness.[53] From a research paradigm perspective, the incorporation of wind instrument training into the fundamental aspects of auditory science is an inadequately investigated domain. For numerous years, auditory research has predominantly concentrated on the impact of external sounds on the cochlea and central auditory cortex, whereas the mechanisms by which sounds produced by one’s own breath, such as those generated during wind instrument practice, may influence the limbic system, autonomic nervous function and overall brain network integration remain largely theoretical and in the nascent stages of investigation.

Future research may utilise multi-modal neuroimaging techniques, integrating functional magnetic resonance imaging (fMRI) with dynamic connectivity analysis of the auditory cortex, sophisticated HRV tracking and auditory brainstem response (ABR) testing, to develop a comprehensive research framework. This would facilitate a comprehensive understanding of the progression from breath and sound production to auditory perception, autonomic feedback and emotional regulation.[54,55] Future studies ought to integrate fMRI with ABR to breath-generated tones in order to delineate auditory–limbic–brainstem pathways and correlate them with autonomic outputs (HRV/respiratory sinus arrhythmia). Recruitment and stratification should focus on individuals with high trait anxiety (e.g., state–trait anxiety inventory (STAI) thresholds), insomnia characterised by nocturnal hyperarousal [pittsburgh sleep quality index(PSQI)/insomnia severity index (ISI)] and mild OSA/snoring subtypes [e.g., positional or rapid eye movement (sleep)(REM)-predominant]. Outcomes should include symptom scales, actigraphy, AHI/snoring indices, partner-reported disturbances and HRV. Such studies could enhance our comprehension of ‘sound modulation’ in auditory science and create new research opportunities for tackling cross-disorders like noise-induced anxiety and environmental sound sensitivity. Due to the swift progress in wearable sensors, miniaturised microphones and digital acoustics technology, forthcoming respiratory music interventions are set to transcend the physical constraints of conventional wind instruments, transforming into more measurable and monitorable smart devices. Exhalation pressure, airflow rates and sound spectral characteristics could be converted into real-time visual feedback, aiding patients in comprehending their breath-sound patterns more clearly. Furthermore, devices that combine auditory feedback with HRV monitoring, such as headsets or chest straps, could record real-time interactions between autonomic fluctuations and sound generation. These technologies not only improve training engagement and compliance but, more significantly, they provide continuous, objective, multi-dimensional data for clinical research. This transforms ‘active auditory regulation’ from a humanistic practice into a neuro-regulation strategy that can be measured and verified through precise instrumentation. This practice can be incorporated into clinical anxiety and sleep protocols, especially in community or home-based rehabilitation, utilising brief daytime sessions, straightforward practice methods and application-enabled feedback and adherence monitoring.

CONCLUSION

Training on wind instruments, as a distinctive non-pharmacological intervention, has shown considerable efficacy in modulating autonomic balance, reducing anxiety and enhancing sleep quality. This practice integrates breath control with auditory feedback, fostering deep breathing and vagal activity while simultaneously improving emotional regulation through self-generated sound, thereby creating an effective feedback loop that unites physiological and psychological mechanisms. Although current clinical and experimental studies are in their nascent phases and the evidence is somewhat disjointed, existing research indicates that wind instrument training markedly diminishes anxiety levels, enhances HRV and reduces nocturnal awakenings. However, several questions remain unanswered, such as the optimal intervention schedule, the ideal training duration and the long-term effects of this approach. These issues require larger-scale and long-term randomised controlled trials for comprehensive validation. Furthermore, subsequent research may utilise multi-modal brain imaging, dynamic HRV tracking and ABR testing to investigate the intricate relationships among respiration, sound, auditory processing and autonomic regulation. These methodologies will establish a robust scientific basis for the extensive implementation of this intervention. In summary, training with wind instruments provides novel opportunities for emotional regulation and enhancement of sleep, while paving the way for non-pharmacological interventions in clinical practice. This method shows potential as an essential instrument for addressing anxiety, sleep disorders and related conditions, especially for individuals seeking alternatives to pharmacological treatments and aiming to achieve equilibrium through self-regulation.

Availability of Data and Materials

The datasets used and/or analyzed during the current study are available from the corresponding author upon reasonable request.

Author Contributions

Yi Ding: conceptualization, data collection, manuscript preparation.

KaiLi Jiang: data analysis, manuscript review.

Ethics Approval and Consent to Participate

Ethical approval for this review was not required. All data utilized in this synthesis were publicly available or provided with consent by the original authors.

Financial Support and Sponsorship

This study did not receive any financial support or sponsorship.

Conflicts of Interest

The authors declare no conflicts of interest.