5. The sound level is 37 dB at a point 11 m away from a loudspeaker that emits a single- frequency tone uniformly in all directions with a constant steady power. Now 20 loudspeakers identical to the first are equally spaced around a circle of radius 22 m, all emitting exactly like the original speaker (same power, same frequency, emitting uniformly in all directions) and all emitting in phase. Ignoring any reflected sound, the sound level at the center of the circle will be closest to a) 55.0 dB b) 53.0 dB c) 51.0 dB d) 57.0 dB e) 59.0 dB

5. The sound level is 37 dB at a point 11 m away from a loudspeaker that emits a single- frequency tone uniformly in all directions with a constant steady power. Now 20 loudspeakers identical to the first are equally spaced around a circle of radius 22 m, all emitting exactly like the original speaker (same power, same frequency, emitting uniformly in all directions) and all emitting in phase. Ignoring any reflected sound, the sound level at the center of the circle will be closest to a) 55.0 dB b) 53.0 dB c) 51.0 dB d) 57.0 dB e) 59.0 dB