THERE IS NO SILENCE...ONLY DEAF EARS... ...................... The human range is commonly given as 20 to 20,000 Hz, though there is considerable variation between individuals, especially at high frequencies, and a gradual decline with age is considered normal. Sensitivity also varies with frequency, as shown by equal-loudness contours en.wikipedia.org/wiki/Hearing_range ............................... ............................. youtube/watch?v=2BAR248VRG0
Posted on: Wed, 17 Sep 2014 21:30:34 +0000
Trending Topics
Recently Viewed Topics
© 2015