Sound

A silent whistle is used to train a dog. When the trainer blows the whistle, humans do not hear it, but dogs do. Its possible frequency is:

 
 
 
 

Threshold of hearing has

 
 
 
 

Minimum distance of a person from obstacle for sound to hear echo is:

 
 
 
 

Which is NOT true for sound?

 
 
 
 

Intensity of threshold of pain (loudest audible sound without pain to ears):

 
 
 
 

Speed of sound in air at 0°C is 332 m/s. What is its speed in vacuum?

 
 
 
 

Which of the following properties of waves is directly related to the loudness of sound?

 
 
 
 

Frequency of sound waves in air is doubled, its speed will:

 
 
 
 

Sound travels faster in

 
 
 
 

Sounds having frequency are called infrasonic waves:

 
 
 
 

Question 1 of 10

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  15. Differentiate between noise and music. Explain how noise is a nuisance.
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