Table 3.

Characteristics of the input data and data source.

Disorder	Recording	Feature	Data source
Parkinson disease	Vowel: 59 [17,40,42,44,48,50,54–59,61–64, 68,69,74–85,87–91,93–97,99,100,102,119–122, 124,126–128,130–132,135,170,183,184,192] Combined: 20 [49,51,53,60,65,66,71, 73,98,101,118,123,125,133,134,171,180,181,185,188] Scripted speech: 3 [52,72,117] Free speech: 3 [70,92,129] Syllable: 2 [67,86]	BLAa: 26 [17,40,50,53,56, 58-60,64-66,71,73,77,79,82,84, 87,88,92,98,118,132,133,184,188] Combined: 45 [42,44,48,51,52,54, 57,62,63,67–70,72,74,76,79,81,85, 86,89–91,93,94,96,97,99,100,119,120,122, 124,126–131,134,135,170,171,184,192] MFCCb: 5 [49,61,80,94,101] Spectrogram: 7 [75,117,123,125,180,181,185] RPc: 1 [95] TQWTd: 2 [55,121] WTe: 1 [83]	CFSf: 31 [48,51,52,65,67, 70,72-74,78-81,83,85,86,88, 92,94,96,97,101,102,117, 130,131,170,171,180,185] UCIg: 33 [40,42,44,50, 53,55–57,60,61,63,64,68,69,71,82, 84,91,93,99,100,119,120,122, 124,126,127,129,133,135,183,188,192] Multiple: 14 [49,54,58,59, 66,75,87,90,98,118,123,125, 132,181] mPower: 4 [17,62,77,128] NCVSh: 1 [88] PARCZi: 1 [89] NGj: 3 [95,121,134]
Dementia, Alzheimer disease	Free speech: 8 [103,105,108,172,173,175] Picture description: 7 [109,110,136-139,174] Scripted speech: 2 [104,176] Combined: 1 [179]	Combined: 11 [103,104,107,109,110,136,138,139,173-175] Vocal: 2 [105,172] BLA: 2 [176,179] Spectogram: 2 [108,137] Speech statistic: 1 [106]	CFS: 10 [103-108,172,173,175,176] ADBCk: 7 [109,110,136-139,174] Multiple: 1 [179]
Cognitive impairment/mild cognitive impairment	Free speech: 3 [112,114,115] Picture description: 2 [116,178] Scripted speech: 2 [113,177] Combined [150]	BLA: 3 [113,114,177] Combined: 2 [112,116] Linguistic: 1 [115] Vocal: 1 [178] Spectogram [150]	CFS: 8 [112-116,150,177,178]
COVID-19	Vowel: 2 [156,157] Combined: 5 [143-147]	Combined: 3 [144,156,157] Spectogram: 3 [143,145,146] MFCC [147]	Coswara: 4 [143,144,156,157] Multiple: 1 [146] CFS: 1 [145] CHRSDl: 1 [147]
Amyotrophic lateral sclerosis	Vowel: 2 [46,160] Scripted speech: 1 [159] Combined: 1 [158]	BLA: 2 [46,160] Combined: 2 [158,159]	CFS: 4 [46,158-160]
Depression	Free speech: 2 [141,161] Scripted speech [140] Combined [142]	Combined: 2 [142,161] Spectrogram: 2 [140,141]	Multiple: 2 [141,161] CFS: 2 [140,142]
Cardiovascular disorders	Vowel: 1 [111] Combined: 1 [186]	BLA: 1 [111] MFCC: 1 [173	CFS: 2 [111,186]
Essential tremor	Vowel: 2 [162,163]	BLA: 1 [162] Spectrogram: 1 [163]	CFS: 2 [162,163]
Multiple sclerosis	Syllable [164] Scripted speech [149]	Spectrogram [164] BLA [149]	CFS: 2 [149,164]
Stroke	Combined: 2 [148,153]	MFCC [148] Spectrogram [153]	CFS: 2 [148,153]
Autism	Free speech [151]	Spectrogram [151]	CFS: 1 [151]
Asthma	Free speech [182]	BLA [182]	CFS: 1 [182]
Fatigue	Scripted speech [187]	Combined [187]	CFS: 1 [187]
Chronic obstructive pulmonary disease	Scripted speech [154]	BLA [154]	CFS: 1 [154]
Neurodegenerative cognitive complaint	Free speech [165]	Combined [165]	CFS: 1 [165]
Functional dysphagia/oropharyngeal dysphagia	Combined [166]	Combined [166]	CFS: 1 [166]
Influenza disease	Vowel [167]	WT [167]	CFS: 1 [167]
Neurological disease	Vowel [169]	Combined [169]	CFS: 1 [169]
Traumatic brain injury	Free speech [152]	Spectrogram [152]	TBIBankm Coelho corpus: 1 [152]

^aBLA: baseline acoustic.

^bMFCC: Mel-frequency cepstral coefficients.

^cRP: recurrence plot.

^dTQWT: tunable Q-factor wavelet transform.

^eWT: wavelet.

^fCFS: collected for study.

^gUCI: University of California, Irvine.

^hNCVS: National Center for Voice and Speech.

ⁱPARCZ: Czech Parkinsonian Speech Database.

^jNG: not given.

^kADBC: Alzheimer Dementia Bank blog corpus.

^lCHRSD: Corona Hack Respiratory Sound data set.

^mTBIBank: Traumatic Brain injury bank.