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Factors That do Not Affect Speed of Sound

If a sound wa...

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If a sound wave has a pressure amplitude Po , speed v in a medium of density p , then the intensity of sound is equal to

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If the pressure amplitude in a sound wave is tripled, then the intensity of

sound is increased by a factor of

Q. If the pressure amplitude of any sound wave is increased by 100 %, then what is the % increase in its intensity ?

Q. A sound wave in air has a frequency of

30 H z

and a displacement amplitude of

6.0 \times 10^{- 3} m m

. For this sound wave calculate the sound intensity level (in dB)
Speed of sound =

344 m / s

and density of air =

1.2 k g / m^{3}

Q. The loudest painless sound produces a pressure amplitude of

28

N m^{- 2}

. Calculate the intensity of this sound wave at S.T.P. Density of air at S.T.P.

= 1.3

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, speed of sound at S.T.P.

= 332

Q. A bomb blast gives a sound of intensity

0.8 {W/m}^{2}

1.5 kHz

. If the density of air is

1.25 {kg/m}^{3}

and speed of sound in air is

330 m/s

, then the amplitude of the sound wave is approximately

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Factors That do Not Affect Speed of Sound

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