A comparative study: TTS Vs wave V after exposure to noise.
The pattern of recovery from noise exposure was monitored, with regards to the behaviour and electrophysiology in 25 normal-hearing subjects, at 4 KHz frequency for 30 min. Fatiguing stimulus was an octave band noise with centre frequency of 3 KHz. Subject's behaviour following to the auditory fatigue was studied by temporary threshold shift (TTS) paradigm. In the electrophysiological study, the auditory fatigue was measured as a shift of the wave V latency in the auditory brainstem responses (ABR) after noise exposure. This shift was measured at 40 dB nHL stimulus intensity ("Logon" with centre frequency at 4 KHz). The ABR recordings started immediately after cessation of noise exposure and threshold measurements 2 min later. The recovery of latency shift began immediately after the exposure and ended faster than the auditory threshold. From a practical point of view it means that in order to measure maximal values of latency shift, the ABR recordings should be performed immediately after cessation of noise exposure.
Kochanek
K
K
Clinica ORL, Accademia di Medicina di Varsavia.
Janczewski
G
G
Abbate
C
C
Giorgianni
C
C
Munaò
F
F
Beninato
G
G
Germanò
D
D
D000328:Adult; D001305:Auditory Fatigue; D001309:Auditory Threshold; D004569:Electroencephalography; D016057:Evoked Potentials, Auditory, Brain Stem; D005260:Female; D006801:Humans; D008297:Male; D009622:Noise / Q000009:adverse effects*; D011897:Random Allocation; D012106:Research; D013997:Time Factors