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In this lesson, we will learn how to relate the beat frequency produced by the superposition of two waves to the waves’ frequencies.

Students will be able to

Q1:

Two sound waves produce a beat frequency of 2.4 Hz. The higher-frequency sound wave has a frequency of 1,025.8 Hz. What is the frequency of the other sound wave? Answer to five significant figures.

Q2:

What beat frequency is produced by two sound waves that have frequencies of 102 Hz and 97 Hz? Answer to one significant figure.

Q3:

When two waves that have slightly different frequencies are superposed, they produce a beat frequency. Which of the following formulas correctly relates the frequencies of the two waves, 𝑓 and 𝑓, where 𝑓>𝑓, to the beat frequency, 𝑓beat?

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