Tag: time period, frequency and amplitude of sound

Questions Related to time period, frequency and amplitude of sound

The difference of sound level between two point is $30$ decibel. The ratio of pressure amplitude between points is : 

physics sound time period, frequency and amplitude of sound amplitude, time period and frequency of a vibration nature and characteristics of sound waves

  1. $10$

  2. $20$

  3. $30$

  4. $32$

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Correct Option: D

The pitch of the sound produced by a stretched string gets higher as the tension .....................

physics sound time period, frequency and amplitude of sound amplitude, time period and frequency of a vibration nature and characteristics of sound waves

  1. Increases

  2. decrease

  3. same

  4. none of these

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Correct Option: A
Explanation:

Pitch depends on string length and string tension.

  1. If the string's mass per unit length remains constant, for longer string, high tension will produce high pitch.
  2. If the string's length remains constant, for heavier string, the higher the tension will generate higher pitch.

The pitch of sound increases if its frequency

physics sound time period, frequency and amplitude of sound amplitude, time period and frequency of a vibration nature and characteristics of sound waves

  1. increases

  2. decreases

  3. remains same

  4. cant say

Show answer
Correct Option: A
Explanation:

The pitch of sound increases if its frequency increases. 
Pitch describes how high or low a tone is and depends upon the rapidity with which a sounding body vibrates, i.e., upon the frequency of vibration. The higher the frequency of vibration, the higher the pitch.

Sound wave P has a greater amplitude and a larger wavelength in air than sound wave Q. How do the loudness and pitch of P compare with the loudness and pitch of Q?
How do the loudness and pitch of P compare with the loudness and pitch of Q?

physics sound time period, frequency and amplitude of sound amplitude, time period and frequency of a vibration nature and characteristics of sound waves

  1. P is louder and higher in pitch than Q

  2. P is louder and lower in pitch than Q

  3. P is quieter and higher in pitch than Q

  4. P is quieter and lower in pitch than Q

Show answer
Correct Option: B
Explanation:
We know that pitch $\propto$ frequency.
wavelength of P $>$  wavelength of Q
$\implies$ frequency of P $<$ frequency of Q
$\implies $ pitch of P $<$  pitch of Q
now ,
loudness $\propto $ amplitude
So, P has more loudness as compared to Q.

Which figure indicates low pitch?

physics sound time period, frequency and amplitude of sound amplitude, time period and frequency of a vibration nature and characteristics of sound waves

  1. True

  2. False

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Correct Option: B
Explanation:

In figure B , wavelength (distance between two successive compressions or rarefactions ) is large therefore frequency will be smaller i.e. pitch is low .

The sound produced by an object vibrating with a high frequency is called _____________ .

physics sound time period, frequency and amplitude of sound amplitude, time period and frequency of a vibration nature and characteristics of sound waves

  1. shrill or high-pitched sound

  2. deep or low-pitched sound

  3. heavy sound

  4. musical sound

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Correct Option: A
Explanation:

The frequency determines the shrillness or pitch of a sound. If the frequency of vibration is higher, we say that the sound is shrill and has a higher pitch. If the frequency of vibration is lower, then we say that the sound has low pitch.

With the increase in frequency of a vibrating body the sound becomes shrill. True or false.

physics sound time period, frequency and amplitude of sound amplitude, time period and frequency of a vibration nature and characteristics of sound waves

  1. True

  2. False

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Correct Option: A
Explanation:

As the frequency of vibration of an object increases, the pitch or shrillness of sound produced by it also increases.

The characteristic of sound which distinguishes between a sharp sound and a dull sound is called loudness. True or false.

physics sound time period, frequency and amplitude of sound amplitude, time period and frequency of a vibration nature and characteristics of sound waves

  1. True

  2. False

Show answer
Correct Option: B
Explanation:

The characteristic of sound which distinguishes between a sharp sound and dull sound is called pitch

The shrillness of a sound depends upon frequency.

physics sound time period, frequency and amplitude of sound amplitude, time period and frequency of a vibration nature and characteristics of sound waves

  1. True

  2. False

Show answer
Correct Option: A
Explanation:

 Pitch is the characteristic of a wave by which sound wave appears shrill or grave. It depends upon the frequency of the wave. 

so the answer  is A.

A shrill sound has a _______ pitch and a dull sound has a _______ pitch.

physics sound time period, frequency and amplitude of sound amplitude, time period and frequency of a vibration nature and characteristics of sound waves

  1. High, low

  2. Low, high

  3. Low, low

  4. High, high

Show answer
Correct Option: A
Explanation:

a shrill sound has a high pitch and a dull sound has a low pitch .

so the answer is A.