CameraIcon

SearchIcon

MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Time Period Independent of Amplitude

A police sire...

Question

A police siren of frequency $f_{s i r e n}$ is attached to a vibrating platform. The platform and siren oscillate up and down in simple harmonic motion which amplitude $A_{P}$ and frequency $f_{P}$ .
Find the maximum and minimum sound frequencies that you would hear at a position directly above the siren.

Open in App

Solution

$f_{m a x} = f_{s i r e n} (\frac{v}{v - 2 π f A})$

$f_{m i n} = f_{s i r e n} (\frac{v}{v + 2 π f A})$

Suggest Corrections

thumbs-up

0

Similar questions

Q. A siren emitting a sound of frequency 100 HZ moves away from you towards a cliff at a speed of 10m/s. The frequency of sound, you hear coming directly from the siren, is [take speed of sound in air =330m/s]

Q. A police bike with its siren on, moving with a velocity

v_{s}

toward a man standing at a bus stop. As the bike approaches, the man hears the sound at a frequency of

f_{d}

. Take the speed of sound to be

v

.
Calculate the frequency produced by the siren?

Q. An observer is standing

500 m

away from a vertical hill. Starting between the observer and the hill, a police van sounding a siren of frequency

1000 H z

moves towards the hill with a uniform speed. If the frequency of the sound heard directly from the siren is 970Hz, the frequency of the sound heard after reflection from the hill (in Hz) is about, (velocity of sound =

330 m s^{- 1}

)

Q. A siren placed at a railway platform is emitting sound of frequency

5 k H z

. A passenger sitting in a moving train A records a frequency of

5.5 k H z

while the train approaches the siren. During his return journey in a different train

B

he records a frequency of

6.0 k H z

while approaches the same siren. The ratio of the velocity of train

B

A

Q. A siren placed at a railway platform is emitting sound of frequency 5 kHz. A passenger sitting in a moving train A records a frequency of 5.5 kHz while the train approaches the siren. During his return journey in a different train B he records a frequency of 6.0 kHz while approaching the
same siren. The ratio of velocity of train B to that of train A is

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Simple Harmonic Oscillation

PHYSICS

Watch in App

explore_more_icon

Explore more

Time Period Independent of Amplitude

Standard XII Physics

Join BYJU'S Learning Program

CrossIcon