Q35 of 199 Page 206

What happens to the loudness of a sound if its amplitude decreases?

We hear less loud sound as amplitude affects volume.


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33

What type of sound waves are produced by a vibrating simple pendulum?

 34

What happens to the loudness of a sound if its amplitude decreases?

 36

What name is given to sound waves of frequencies higher than 20 kHz?

 37

Fill in the following blanks with suitable words:

(a) An echo is simply a ………. Sound.


(b) Pitch od sound depends on ………


(c) Loudness of sound depends on ……….


(d) Quality of sound depends on ……….


(e) Echoes are caused by the …………of sound.