Table 1.

Description, recording parameters, and analysis criteria of auditory tests performed in the exposed group and control group.

Test	Sample Included	Recording Parameters	Analysis Criteria
BAEP	Participants with auditory thresholds up to 25 dB HL at the frequencies from 2000 to 4000 Hz; Participants with auditory thresholds from 30 to 50 dB HL at the frequencies from 2000 to 4000 Hz.	Equipment: Vivosonic/Integrity®, V500, Vivosonic Inc, Toronto, ON, Canada Surface electrodes: forehead (Fz—positive electrode), and right and left mastoids (M1 and M2—negative electrodes) Transducer: E3-A insert earphone Immittance: <5 kOhms Promediations: 2000 stimuli Type of stimulus: click Presentation rate: 27.7 clicks/s Filters: 100–3000 Hz Recording window: 12 ms Polarity: rarefied Intensity: 80 dBnHL	Presence of waves I, III, and V. Latency of waves I, III, and V. Interpeak latencies of waves I–V, I–III, and III–V. Amplitude of waves I’ and V’. The analysis criterion was the comparison between the records of the two groups.
DDT—binaural integration	Participants with a four-frequency mean (500, 1 kHz, 2 kHz, and 4 kHz) up to 25 dB HL.	Equipment: Madsen®/Itera II, GN Otometrics, Ballerup, Denmark. Additionnal material: CD by Pereira and Schochat (1997) [32], volume 2, track 3, and test 6. Intensity: 50 dB SL List: 80 digits	Up to 59 years old = score higher than 95%. 60 years or older, without hearing loss = 78%.
TEOAE	Participants with the presence of TEOAE and type A tympanometric curve.	Equipment: Otodynamics®/ILO 292/V6, Hatfield, UK Intensity of the stimulus: 60–65 dB SPL Intensity of contralateral white noise: 60 dB SPL Type of stimulus: linear click Number of stimuli: 200 sweeps with noise, and 200 sweeps without noise.	Comparison between the OAE results with and without contralateral noise in each frequency and general response. Minimum decrease in the general response of 0.5 to 1.0 dB.