听觉疲劳的安全界限  

SAFETY LIMIT OF AUDITORY FATIGUE

作　　者：王乃怡[1] 

机构地区：[1]中国科学院心理研究所

出　　处：《心理学报》1987年第3期235-238,共4页Acta Psychologica Sinica

摘　　要：本文研究了500-1000Hz倍频程带噪声80-110dBSPL,连续暴露8分钟后,在听阈的恢复过程中听阈的回升与最大TTS随暴露的声级向高频转移时的相互关系。结果表明,当暴露的强度超过90dBSPL时,听阈在2000和4000Hz上的回升随声级增加而增加、而当强度达到98dBSPL以后,回升不再随声级而增加了。最大TTS开始向高频转移时的临界强度是95dBSPL,而此时也正好是回升在高频处于急剧增加的过程中。可以设想,听阈回升的增加和最大TTS的频率转移二者可能都反映着听觉疲劳的发展。因此,为了安全,可以把90dBSPL看做是500—1000Hz倍频程带噪声的最大允许声压级。The articla investigated the bounce appearing 2 minutes afterexposure to 500-1000Hz octave band noise at 80-110dB SPL, and itsrelation to the transferring of maximum TTS to high frequency alongwith the level of exposure. The results indicated that when exposureintensity exceeded 90dB SPL, the bounce at 2000Hz and 4000Hz increasedsharply with the level of exposure. When the exposure intensity reached98dB SPL, the bounce no longer increased with the level of exposure.The critical intensity of maximum TTS which began to transfer to highfrequency was 95dB SPL, which was just the time when the bounce wasin the process of sharp increase at high frequency. Therefore 90dB SPLmay be regarded as the maximum tolerable sound pressure level of 500-1000Hz octave band noise.

关 键 词：恢复过程 暴露声级 听觉疲劳 安全界限 平均值 倍频程 临界强度 频率转移 听阈 高频 

分 类 号：B[哲学宗教]