Hearing
The absolute threshold of hearing is the minimum sound level of a pure tone that an average 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 threshold of hearing is generally reported as the RMS sound pressure of 20 µPa (micropascals) = 2×10−5 pascal (Pa). It is approximately the quietest sound a young human with undamaged hearing can detect at 1,000 Hz. The threshold of hearing is frequency dependent and it has been shown that the ear's sensitivity is best at frequencies between 1 kHz and 5 kHz.
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Famous quotes containing the word hearing:
“I sprang not more in joy at first hearing he was a man-child
than now in first seeing he had proved himself a man.”
—William Shakespeare (1564–1616)
“To-night she will spread her brown hair on his pillow,
But I shall be hearing the harsh cries of wild fowl.”
—Patrick MacDonogh (1902–1961)
“With all the gracious utterance thou hast
Speak to his gentle hearing kind commends.”
—William Shakespeare (1564–1616)