lf two sources 2 points Save Answer instructor of sound at frequencies \"f1\" an

Question

lf two sources 2 points Save Answer instructor of sound at frequencies "f1" and "f2" are present, a listener may hear a beat frequency at f_beat = |f1-f2|. Say your lab level from turns on two such sources, and tells you f1 = 500 Hz, and that f2 is slightly higher frequency. You hear the combined sound frequency the sources get louder and softer, and you measure that it takes 10 seconds for this cycle to repeat 20 times. What is the (in Hz) of the second source, f2? (Enter just the number, without units.) Do some research: What FFT (Fast Fourier Transform)? How it useful? Explain in your own words, and cit your reference. Also state how you think you might use an FFT measurement to study the properties of your musical instrument. For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac).

Explanation / Answer

Frequency of the beat can be calculated as following,

10 sec reapets cycle 20

1 sec repeates cycle = 20/10 = 2 Hz

So the frequency of the beat is 2 hz.

Now since f2 is of higher frequency, so f2 = 550+2 = 552 Hz

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