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Byju's Answer
Standard IX
Physics
Audible,Infrasonic and Ultrasonic Sound
Sound with fr...
Question
Sound with frequency less than 20 Hz is called:
A
Infrasonic sound
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B
Supersonic sound
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C
Ultrasonic sound
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D
Sonic sound
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Q.
Match the pairs
Group 'A' Group 'B'
(a) Flute (1) Frequency less than 20 Hz
(b) Frequency (2) Frequency more than 20000 Hz
(c) Sound level (3) Vibrations in the air
(d) Ultrasonic sound (4) Measured in Hz
(e) Infrasonic sound (5) Decibel
Q.
Sound with frequencies less than
20
H
z
are known as infrasonic sound.
Q.
Sound with frequency less than 20 Hz is called:
Q.
Sounds of frequency less than 20 Hz are called
Q.
Sound waves with a frequency below 20 Hz are called
(a) infrasonic waves
(b) ultrasonic waves
(c) ultrasound
(d) none of these
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