1) A piano tuner hears one beat every 1.3 s when trying toadjust two strings, one of which is sounding 350 Hz. How far off infrequency is the other string?
2) A source emits sound of wavelengths 2.64 m and 2.81 m in air.a) How many beats per second will be heard? (AssumeT=20?C.) B)How far apart in space are the regions ofmaximum intensity?
3) A hiker determines the length of a lake by listening for theecho of her shout reflected by a cliff at the far end of the lake.She hears the echo 3.7 s after shouting. The speed of sound in airis 343 m/s. determine the length of the lake.
4) What is the resultant sound level when an 83 dB sound and an86 dB sound are heard simultaneously?
