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.
Read more about this topic: Absolute Threshold
Famous quotes containing the word hearing:
“Recently we’ve been hearing a lot about women “having it all.” Myself, I think that is not really an accurate description of female lives today. It seems to me that what we have been up to is DOING it all.”
—Sylvia Hewlett (20th century)
“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)
“The hearing ear is always found close to the speaking tongue; and no genius can long or often utter anything which is not invited and gladly entertained by men around him.”
—Ralph Waldo Emerson (1803–1882)