Class 8th
Chapter 10
Notes of the sound produced by animals.
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Almost all sounds produced by mammals result from the movement of air through different tissues. ... Toothed whales can produce sounds using their larynx as well as specialized air sacs near their blowhole. The larynx is used to produce whistles, while the air sacs are used to produce high frequency echolocation signals.
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Many animals like dogs ,cows,goats etc produce sound with the help of vocal chords.But all animals do not have vocal chords .The birds prodicevsounds with the help of the special vocal instryment present breathing tube.Flies produce sound by vibrating their wings fast.Frog produces the croaking sound with the help of its vocal chords.Some fish generate sound by pushing air out of theirvairbladder.Snakes do not have vocal chords but produce sound by pusshing air out of their mouths.
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