threshold of hearing
- The minimum sound pressure level necessary to be detected by human ears. Since hearing acuity varies considerably from human to human, it has been internationally agreed that a value of 20 micropascals is the equivalent of 0 decibels to a person with good hearing. Thus, sound pressure level equal to or greater than 0 decibels is considered audible. Before pain sets in, a person with good hearing can listen at 120 decibels, or 20 pascals, which is a trillion times louder than 0 decibels. Also called threshold of audibility, threshold of detectability, or audibility threshold.
- synonym threshold of audibility
- synonym threshold of detectability
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