A- The frequencies of two tuning forks are measured to be 308 Hz and 330 Hz resp

Question

A- The frequencies of two tuning forks are measured to be 308 Hz and 330 Hz respectively. If the two forks make a sound beat, what is the beat frequency (in unit of Hz)?

...............

B- Two sound waves have frequencies 240Hz and 260Hz respectively. When they make a beat sound,  the pitch (frequency) of the beat sound is__________.

..... Higher than 260Hz

..... Lower than 240Hz

..... Between 240 and 260Hz

C-

A louder sound must have a higher frequency than a weaker sound.

..... True

..... False

..... Higher than 260Hz

..... Lower than 240Hz

..... Between 240 and 260Hz

Explanation / Answer

A)

f1 = 308 Hz

f2 = 330 Hz

beat frequency = |f1 - f2|

beat frequency = |330- 308|

beat frequency = 22 Hz

the beat frequency is 22 Hz

B)

for the beat sound

beat frequency = |260 - 240 |

beat frequency = 20 Hz

the pitch of the beat frequency is 20 Hz

C)

False ,the louder sound depnds on the power of sound not the frequency

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