A-LevelPhysicsSuperposition9702/12 · Oct/Nov 2012 · Q281 Mark
The diagram shows two identical loudspeakers driven in phase by a common audio-frequency source. [Figure showing two loudspeakers and regions of loud/quiet sound] When a student moves along line XY, she notices that there are variations in the loudness of the sound. The regions in which the sound is heard are alternately loud and quiet as indicated on the diagram. How may the distance between loud regions be reduced?
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
Adecreasing the distance a between the speakers
Bincreasing distance d
Cincreasing the frequency of the audio-frequency source
Dincreasing the power output from the audio-frequency source
✓ Correct answer
C: increasing the frequency of the audio-frequency source
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