When two sound waves are superimposed, beats are produced when they have different
amplitudes and phases
velocities
phases
frequencies
Get Answer
For producing beats, their must be small difference in frequency.
Beats are produced by two waves:
and
The number of beats heard/sec is:
0
2
1
4
Maximum number of beats frequency heard by a human being is
10
20
6
Persistence of hearing is .
The essential condition for the formation of beats is
difference in frequencies of two sources should be
Three sound waves of equal amplitudes have frequencies . They superpose to give beats. The number of beats produced per second will be :
3
Maximum number of beats
Two tones of frequencies and are sounded together. The beats can be heard distinctly when
As number of beats diff. in frequencies has to be less than 10 , therefore
What will be the frequency of beats formed from the superposition of two harmonic waves shown below?
Figure(a) represents a harmonic wave of frequency , figure (b) represents a harmonic wave of frequency . Therefore beat frequency .
Two factories are sounding their sirens at . A man goes from one factory to other at a speed of . The velocity of sound is . The number of beats heard by the person in one second will be:
8
Frequency of sound produced by siren, Speed of observer,
Velocity of sound,
No. of beats heard per second = ?
No. of extra waves received by the observer per second
No. of beats/ sec
Two vibrating tuning forks produce progressive waves given by and . Number of beats produced per minute is
360
180
60
Equation of progressive wave is given by
Given and .
Comparing the given equations with equation of progressive wave, we get
Beats beats
Two tuning forks and when set vibrating, give 4 beats per second. If a prong of the fork is filled, the beats are reduced to what is frequncy of , if that of is ?
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