Effect of low level acoustic stimulation on temporary threshold shift in young humans.
To assess the effect of a low level acoustic stimulation on the susceptibility to noise, young human subjects were exposed to music at 70 dBA for 6 h per day during 9 days (training period). Noise sensitivity was assessed by measuring temporary threshold shift (TTS) induced by 105 dBSPL, 1/3 octave band noise at 2 kHz for 10 min. On the fifth day of the training period, a significant decrease of TTS was observed in the frequency range 3-3.5 kHz, in comparison with the baseline TTS obtained before being trained. As the training continued, the frequency range which showed a significant reduction of TTS expanded to 2-5 kHz.
Miyakita
T
T
Department of Hygiene, Kumamoto University Medical School, Japan.
Hellström
P A
PA
Frimanson
E
E
Axelsson
A
A
D000161:Acoustic Stimulation / Q000379:methods; D000222:Adaptation, Physiological; D000293:Adolescent; D001299:Audiometry; D001309:Auditory Threshold / Q000502:physiology*; D002648:Child; D005260:Female; D006309:Hearing / Q000502:physiology*; D006801:Humans; D008297:Male; D013997:Time Factors