The sound level at a distance d%=49 m from a loudspeaker is 70 dB. What is the power (in Watt) at which sound energy is being produced by the loudspeaker?. The threshold of hearing, lo 1*10-12 W/m?. A. 0.3018 B. 0.8512 C. None D. 1.207

The sound level at a distance d%=49 m from a loudspeaker is 70 dB. What is the power (in Watt) at which sound energy is being produced by the loudspeaker?. The threshold of hearing, lo 1*10-12 W/m?. A. 0.3018 B. 0.8512 C. None D. 1.207

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter17: Physics Of Hearing

Section: Chapter Questions

Problem 19PE: (a) What is the intensity of a sound that has a level 7.00 dB lower than a 4.00109W/m2 sound? (b)...

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Stretched string

A stretched string is a wire which is made up of any metal that must have a larger length compared to its thickness. The ends of the wire are fixed, and when they oscillate or are plucked, it produces two reflected transverse waves of the same frequency and same amplitude. The waves or pulses are traveling in alternate directions and superimpose with one another. This waveform is named standing or stationary waves.

Question

The sound level at a distance d=49 m from a loudspeaker is 70 dB. What is the power (in Watt) at which
sound energy is being produced by the loudspeaker?. The threshold of hearing, I, = 1*10-12 W/m2.
%3D
A. 0.3018
B. 0.8512
C. None
D. 1.207
E. 0.5494

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