The sound level at a distance d=D44 m from a loudspeaker is 70 dB. What is the power (in Watt) at which sound energy being produced by the loudspeaker?. The threshold of hearing, lo = 1*10-12 W/m?. A. 0.2434 B. 0.4933 C. 0.9734 D. None E. 0.7367

The sound level at a distance d=D44 m from a loudspeaker is 70 dB. What is the power (in Watt) at which sound energy being produced by the loudspeaker?. The threshold of hearing, lo = 1*10-12 W/m?. A. 0.2434 B. 0.4933 C. 0.9734 D. None E. 0.7367

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter17: Sound

Section: Chapter Questions

Problem 72P: Loudspeakers can produce intense sounds with surprisingly small energy input in spite of their low...

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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=44 m from a loudspeaker is 70 dB. What is the power (in Watt) at which sound energy
being produced by the loudspeaker?. The threshold of hearing, lo = 1*10-12 W/m².
A. 0.2434
B. 0.4933
C. 0.9734
D. None
E. 0.7367
Ne:

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