Difference between revisions of "Threshold of Audibility"
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Threshold of Audibility
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For a specified signal, the
minimum effective sound
pressure level of the signal that is capable of evoking an auditory
sensation in a specified fraction of the trials. The characteristics of the
signal, the manner in which it is presented to the listener, and the point at
which the sound pressure level is measured must be specified. Also called
threshold of detectability. Unless otherwise indicated, the ambient
noise reaching the ears is assumed to be negligible. The threshold is usually
given as a sound pressure level in decibels, relative to 0.0002 microbar.
Instead of the method of constant stimuli, which is implied by the phrase a
specified fraction of the trials , another psychophysical method (which
should be specified) may be employed.
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References
This article is based on NASA's Dictionary of Technical Terms for Aerospace Use
