Q9 of 25 Page 73

Pitch of sound is determined by its

The frequency determined the pitch of a sound.


⇒ If the frequency of vibration is higher, this means the sound has a higher pitch.


⇒ If the frequency of vibration is lower, this means the sound has a lower pitch.


⇒ Thus, pitch of a sound is determined by its frequency

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The loudness of sound is determined by the

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1 hertz is equal to

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Ultrasound has frequency of vibration

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Lightning can be seen the moment it occurs. Paheli observes lightning in her area. She hears the sound 5 s after she observed lightning. How far is she from the place where lightning occurs?

(speed of sound = 330 m/s).