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

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (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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