听阈 Absolute threshold of hearing
（重定向自Auditory threshold）
听阈指人或其它动物的耳朵在特定环境中，能感觉到的声音的最小强度。正常人耳对不同频率声音的听阈略有不同，但一般频率为1kHz的声波至少要产生20µPa的压力，才能被感觉到。这个值也是绝对声响的参考值，被定为0分贝（20µPa=0dBSPL）。一般人的听阈则在1至3分贝之间。
Auditory threshold
中文百科
英语百科
Absolute threshold of hearing 听阈
（重定向自Auditory threshold）
The absolute threshold of hearing (ATH) is the minimum sound level of a pure tone that an average human ear with normal hearing can hear with no other sound present. The absolute threshold relates to the sound that can just be heard by the organism. The absolute threshold is not a discrete point, and is therefore classed as the point at which a sound elicits a response a specified percentage of the time. This is also known as the auditory threshold.
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