Two identical loudspeakers, placed close to each other inside a...

Two identical loudspeakers, placed close to each other inside a room, are supplied with the same sinusoidal voltage. One can imagine a pattern around the loudspeakers with areas of increased and decreased sound intensity alternately located. Which of the following actions will NOT change the locations of these areas?

Options

AMoving one of the speakers.
BChanging the amplitude of the signal voltage.
CChanging the frequency of the signal voltage.
DReplacing the air in the room with a different gas.

Correct answer

B. Changing the amplitude of the signal voltage.

Step-by-step solution

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