The acoustical system shown in the figure is driven by a speaker emitting sound of frequency 620 Hz. Take v air =340 m/s. (a) If the upper U-shaped tube is 1.10 m long and the lower Ushaped tube is 1.37 m long, can the person in the picture hear the sound? Why? (b) To change the status (either from louder to softer or from softer to louder), how much the length of the lower Ushaped tube needed to be increased?
Interference of sound
Seiche
A seiche is an oscillating standing wave in a body of water. The term seiche pronounced saysh) can be understood by the sloshing of water back and forth in a swimming pool. The same phenomenon happens on a much larger scale in vast bodies of water including bays and lakes. A seizure can happen in any enclosed or semi-enclosed body of water.
The acoustical system shown in the figure is driven by a speaker
emitting sound of frequency 620 Hz. Take v air =340 m/s.
(a) If the upper U-shaped tube is 1.10 m long and the lower Ushaped tube is 1.37 m long, can the person in the picture hear the
sound? Why? (b) To change the status (either from louder to softer
or from softer to louder), how much the length of the lower Ushaped tube needed to be increased?
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