Val taps two different tuning forks at the same time the...

Val taps two different tuning forks at the same time. The resulting sound has a frequency of 852 Hz, but its volume oscillates up and down. If one of the tuning forks produces a 855 Hz note, what is the beat frequency of the interfering sound waves? Select one: a. 1.5 Hz b. 3 Hz c. 4.5 Hz d. 6 Hz

When tones that are very close together in frequency are sounded together, a beat pattern is produced which is perceived as an alternating loud/soft pulse. The frequency of this pulse is the difference in the frequencies of the two tones. This is one reason why it is important for musical instruments in an orchestra to be in tune. Suppose there are three tuning forks, A, B, and C, and that fork B has a frequency of 440 Hz. When A and B are sounded together, a beat frequency (the frequency of the pulse) of 3 Hz is heard. When B and C are sounded together, the beat frequency is 4 Hz. (A) What are the possible frequencies of A? (B) What are the possible frequencies of C? (C) What beat frequencies are possible when A and C are sounded together? (D) Assume each fork produces a sound level of 75 dB. If all three of the forks are sounded together, what is the new sound level? Show work Answers are 13(A): 437 Hz, 443 Hz. 13(B): 436 Hz, 444 Hz. 13(C): 1 Hz or 7 Hz. 13(D): 79.8 dB

Suman K.

Question

Val taps two different tuning forks at the same time. The resulting sound has a frequency of 852 Hz, but its volume oscillates up and down. If one of the tuning forks produces a 855 Hz note, what is the beat frequency of the interfering sound waves? Select one: a. 1.5 Hz b. 3 Hz c. 4.5 Hz d. 6 Hz

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