A whistle emitting a sound of frequency 440 Hz is

Question

A whistle emitting a sound of frequency 440 Hz is tied to a string of 1.5m length and rotated with an angular velocity of 20 rad s-1 in the horizontal plane. Calculate the range of frequencies heard by an observer stationed at a large distance form the whistle.

Aditi Chauhan · Accepted Answer

Hello Student,

Please find the answer to your question

The whistle which is emitting sound is being rotated in a circle.

We know that v = rω = 1.5 x 20 = 30 ms^-1

When the source is instantaneously at the position A, then the frequency heard by the observer will be

v’ = v [v/v – v_s] = 440 [330/330 – 30] = 484 Hz

when the source is instantaneously at the position B, then the frequency heard by the observer will be

v” = v[v / v + v_s] = 440 [330/330 + 30] = 403.3 Hz

Hence the range of frequencies heard by the observer is

403.3 Hz to 484 Hz.

Thanks
Aditi Chauhan
askIITians Faculty

Wave Motion> A whistle emitting a sound of frequency 4...

A whistle emitting a sound of frequency 440 Hz is tied to a string of 1.5m length and rotated with an angular velocity of 20 rad s^-1 in the horizontal plane. Calculate the range of frequencies heard by an observer stationed at a large distance form the whistle.

Simran Bhatia , 11 Years ago

Aditi Chauhan

LIVE ONLINE CLASSES

A particle on a speing executes shm when the particle is found at x=xmax/2 the speed of the partcle is
A)vx=vmax
B)vx=√3vmax/2
C)vx=√2vmax/2
D)vx=vmax/2

wave motion

displacement associated with three dimensional wave is given by sai x y is equal to 1 + 1 by 2 x + root 3 by 2 k x minus omega t show that the wave propagates along a direction making an angle 60 degree with the x-axis

wave motion

What do you mean by Energy of Simple Hormonic Motion?

wave motion

What is mean by motion and time define it's all types with there parts and their s.i. units.

wave motion

explain the effects of doppler effect in satellite communication

wave motion

Wave Motion> A whistle emitting a sound of frequency 4...

A whistle emitting a sound of frequency 440 Hz is tied to a string of 1.5m length and rotated with an angular velocity of 20 rad s-1 in the horizontal plane. Calculate the range of frequencies heard by an observer stationed at a large distance form the whistle.

Simran Bhatia , 11 Years ago

Aditi Chauhan

LIVE ONLINE CLASSES

Other Related Questions on wave motion

A particle on a speing executes shm when the particle is found at x=xmax/2 the speed of the partcle is A)vx=vmax B)vx=√3vmax/2C)vx=√2vmax/2D)vx=vmax/2

wave motion

displacement associated with three dimensional wave is given by sai x y is equal to 1 + 1 by 2 x + root 3 by 2 k x minus omega t show that the wave propagates along a direction making an angle 60 degree with the x-axis

wave motion

What do you mean by Energy of Simple Hormonic Motion?

wave motion

What is mean by motion and time define it's all types with there parts and their s.i. units.

wave motion

explain the effects of doppler effect in satellite communication

wave motion

A whistle emitting a sound of frequency 440 Hz is tied to a string of 1.5m length and rotated with an angular velocity of 20 rad s^-1 in the horizontal plane. Calculate the range of frequencies heard by an observer stationed at a large distance form the whistle.

A particle on a speing executes shm when the particle is found at x=xmax/2 the speed of the partcle is
A)vx=vmax
B)vx=√3vmax/2
C)vx=√2vmax/2
D)vx=vmax/2