SOUND PRESSURE LEVELS OF MUSICAL INSTRUMENTS NEAR AN ORCHESTRAL MUSICIAN'S EAR AND TTS MEASUREMENT

摘要

In this study, we evaluated the effects of instrumental sounds on musicians' hearing in terms of TTS. A-weighted sound pressure levels (L_(Aep)) of thirteen kinds of instruments were measured near the musicians' ear. The values of L_(Aep) ranged from 76.8 to 104.0 dB. TTS was measured following one-hour exposure to eight kinds of sounds. The trumpet sound produced the largest TTS of about 15 dB at 4 kHz. Furthermore, the TTS value following four-hour exposure to each instrumental sound was also estimated by using a prediction method. The trumpet and piccolo sounds could produce about 20 dB of TTS.