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2 December, 05:52

A guitarist is tuning a guitar. She hears a low beat every 2.0 seconds. What is the difference between the correct frequency and measured frequency of the guitar string?

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  1. 2 December, 08:51
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    A "beat" is an audible period that arises due to a difference wave between two sine oscillations. With that, if the guitarist hears 2 beats per second, i. e., at a frequency of 1/2s = 0.5 Hz, the difference between the guitar and the reference (a tuner tool) is 0.5Hz. This could be due to the guitar being 0.5Hz under the reference, or 0.5Hz above the reference.
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