You and a friend frequently play a trombone duet in a jazz band. During such per

Question

You and a friend frequently play a trombone duet in a jazz band. During such performances it is critical that the two instruments be perfectly tuned. Since you take better care of your trombone, you decide to use your instrument as the standard. When you produce a tone that is known to be 455 Hz and your friend attempts to play the same note, you hear 3 beats every 3.00 seconds. Your ear is good enough to detect that your trombone is at a higher frequency. Determine the frequency of your friend's trombone. (Enter your answer to at least 1 decimal place.)

Explanation / Answer

3 beats every 3 seconds is 1 beat every 1 sec

That is a beat frequency of 1 Hz

Your friends trombone is therefore 1Hz lower in frequency

455 - 1 = 454.0 Hz

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