Abstract
The effect of steady-state noise (88 dB, exposure for 30 minutes) and the combined effect of it with impulse noise (peak sound pressure 125 dB, time constant 10 ms, i.e. duration of the impulse, frequency every 4 seconds, exposure for 30 minutes) on the temporary threshold shift (TTS) were studied on 5 healthy young men. TTS at both test frequencies of 1kHz and 4kHz was much larger in the latter case. This seems to show that the ability of the steady-state noise to arouse acoustic reflex is just of temporary nature.
