Calculating Beat Frequency for Two Loudspeakers

  • Thread starter Thread starter inflames829
  • Start date Start date
  • Tags Tags
    Sound
AI Thread Summary
To calculate the beat frequency heard by a person walking between two loudspeakers emitting a 343 Hz tone, the Doppler effect must be applied. As the person moves towards one speaker and away from the other, the frequencies perceived will differ. The apparent frequency for the approaching speaker increases, while it decreases for the receding speaker. The beat frequency is determined by the difference between these two frequencies. The discussion concludes with the participant confirming they arrived at the correct answer.
inflames829
Messages
40
Reaction score
0

Homework Statement


Two loudspeakers face each other at opposite ends of a long corridor. They are connected to the same sourrce that produces a pure tone of 343Hz. A person walks from one speaker towards the other at a speed of 0.7ms-1
What beat frequency does the person hear?
speed of sound= 343ms-1


Homework Equations





The Attempt at a Solution


I know the beat frequency equals the frequency of one take the frequency of the second. So if this is right does that mean it is 343 minus the second frequency. Can someone pleasae tell me if this is correct and any hints on how to work out the second frequency please. Thankyou
 
Physics news on Phys.org
Using the doppler effect wright down the expression for the apparent freqency of the source heard by the observer while moving from one speaker to another. Note that he is going away from one speaker and moving towards the other.
 
thanks for the help. I got the right answer
 

Thread 'Rolling without slipping on a curved surface'

Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
View full post »

Thread 'Struggling to understand the concept of this question (ice cube in water optics question)'

TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
View full post »

Similar threads

Beat frequency heard from two tuning forks
Replies
4
Views
3K
Doppler effect and beat frequency
Replies
3
Views
2K
Travelling towards a Canyon Wall: Calculating Beat Frequency
Replies
3
Views
2K
Measuring the Speed of Sound: Examining the Frequency of Clicks
Replies
3
Views
4K
What is the beat frequency for a cyclist ringing a bell towards a wall?
Replies
2
Views
2K
Beats calculation/Doppler Effect
Replies
1
Views
2K
Audio interference of sound waves from two speakers
Replies
19
Views
4K
Sound Interference Problem -- Observer moving between two speakers
Replies
3
Views
4K
Sound Wave Interference and Finding the Path Differences with Diagrams
Replies
20
Views
5K
Calculating frequency of the second harmonic
Replies
2
Views
2K

Hot Threads

Recent Insights

Back
Top