Question:
Beats are produced by superposition of two waves with:
Beats are produced by superposition of two waves with:
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Beats = Difference. The wah-wah sound comes from the small difference in frequencies.
Updated On: May 5, 2026
- Same frequency and amplitude
- Slightly different frequencies
- Opposite phases
- Same wavelength
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The Correct Option is B
Solution and Explanation
Step 1: Concept
Beats are the periodic fluctuations in the intensity of sound heard when two sound waves of nearly equal frequencies interfere with each other.
Step 2: Meaning
The "beat frequency" is the difference between the two original frequencies ($f_{beat} = |f_{1} - f_{2}|$).
Step 3: Analysis
If frequencies are identical, we get a steady interference pattern, not beats. If frequencies are too different, the ear cannot distinguish the periodic pulses.
Step 4: Conclusion
Therefore, the specific condition for producing audible beats is that the superposing waves must have slightly different frequencies. Final Answer: (B)
Beats are the periodic fluctuations in the intensity of sound heard when two sound waves of nearly equal frequencies interfere with each other.
Step 2: Meaning
The "beat frequency" is the difference between the two original frequencies ($f_{beat} = |f_{1} - f_{2}|$).
Step 3: Analysis
If frequencies are identical, we get a steady interference pattern, not beats. If frequencies are too different, the ear cannot distinguish the periodic pulses.
Step 4: Conclusion
Therefore, the specific condition for producing audible beats is that the superposing waves must have slightly different frequencies. Final Answer: (B)
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