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15
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Sound is produced when a body ________________________
Vibrates
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We can distinguish a shrill sound from a flat surface by its __________________
Pitch
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baam
Lose 25 points!
Oops!
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gold
Win 50 points!
Okay!
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shark
Other team loses 25 points!
Okay!
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thief
Give points!
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15
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How does the sound produced by a vibrating object in a medium reach your ear ?
When an object vibrates the surrounding particles also vibrate . These particles are adjacent to the vibrating particle forced to vibrate
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15
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Define Reflection of sound ?
The process of bouncing back on the sound on a striking surface is called reflection of sound
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baam
Lose 25 points!
Oops!
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gift
Win 10 points!
Okay!
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rocket
Go to first place!
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thief
Give points!
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15
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Define Pitch ?
Pitch is the charecteristic of sound which determines the shrillness of a sound
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25
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We can hear sounds from which frequency___________________________
500 Hz
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15
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Define Amplitude ?
The maximum displacement of wave on the either side of its mean position is called amplitude .
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trap
No points!
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gift
Win 20 points!
Okay!
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fairy
Take points!
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25
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thief
Give points!
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25
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What do you understand from the term infrasonic sounds ?
The sound frequency lower than 20Hz are called infrasonic sounds
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15
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Define Vocal cords ?
Vocal Cords are a pair of thin stretchable ligaments that help us produce sound
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What is the unit of Amplitude ?
metre
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What is the audible range of an average human ear ?
An average human ear has 20Hz to 20,0000 Hz
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15
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Suppose if you and your friend are on the moon . Will you able to hear the sound produced by your friend ?
No , you will not be able to as the moon has no atmosphere , Therefore sound waves cannot travel so we cannot hear the sound
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15
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Why do headphones have cushions on them ?
Headphone cushions are placed so that it prevents noise isolation and the cushions prevent sound waves reflect back to the earth
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