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Sound
What distinguishes the sounds produced by different human beings from each other?
In human beings, vocal cords produce sounds. When they vibrate, they produce sound. Vocal cords are held by the muscles. The tightness with which they are determines determines the quality of sound.
The length of the vocal cords also determines the quality of voice and is different in differnt individuals. Hence, sounds can be distinguished.
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State True or false:
Sound cannot travel in vacuum.
In the following statements, tick ‘T’ against those which are true, and ‘F’ against those which are false :
State True or False:
If the amplitude of vibration is large, sound is feeble.
For human ears, the audible range is 20 Hz to 20,000 Hz.
State True or False:
The lower the frequency of vibration, the higher is the pitch.
State True or False:
Unwanted or unpleasant sound is termed as music.
State True or False:
Noise pollution may cause partial hearing impairment.
Time taken by an object to complete one oscillation is called __________.
Loudness is determined by the __________ of vibration.
The unit of frequency is ________.
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