List of top Physics Questions on Traveling Sound Waves asked in AP ECET Metallurgical Eng, AP ECET ECE

A sound absorber attenuates the sound level by 20 dB. The intensity decreases by a factor of

A source of sound is moving towards a wall with a speed of 20 $ms^{-1}$ The frequency of the sound produced by the source is 400 Hz. If the speed of the sound is 340 $ms^{-1}$, the beat frequency heard by a person standing near the wall is

A person standing between two parallel hills fires a gun. He hears the first echo after 1.5 sec and second echo after 2.5 sec. If the speed of a sound is 332 $ms^{-1}$, the distance between the hills is

The velocity of sound in air is 330 $ms^{-1}$. To increase the apparent frequency of the sound by 50%, the source should move towards the stationary observer with a velocity equal to}

If the total absorption of a hall is doubled, the reverberation time will

To have a good sound effect inside a hall

A source of sound producing wavelength of $50 \text{ cm}$ is moving away from stationary observer with $\frac{1}{5}\text{th}$ speed of sound. The wavelength of the sound heard by the observer is