QUESTION 1In a private office, the fire alarm sound level should be a minimum ofdB, anddB above ambient.In a residential bedroom, the fire alarm sound level should be a minimum ofdB.QUESTION 2A 25 m x 25 m room has four wall mounted strobe lights. What is the light output intensity of each strobe?QUESTION 3An advantage of a speaker over a bell is that the speaker output sound level is adjustable.O TrueO FalseQUESTION 4For visual devices installed in a corridor, the maximum distance from the device to the end wall isand the maximum distance between devices isQUESTION 5DC voltage driven devices such as bells and horns have ainside. The purpose of this, is tosupervisory current.

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Answered: QUESTION 1 In a private office, the…

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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*108. D A member of an aircraft maintenance crew wears protective earplugs that reduce the sound intensity by a factor of 350. When a jet aircraft is taking off, the sound intensity level experienced by the crew member is 88 dB. What sound intensity level would the crew member experience if he removed the protective earplugs?
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The electrical power needed to operate a speaker in your audio system is 18.7 W. If this speaker has a circular opening with a radius of 0.0743 m and the average sound intensity at the opening is 22.1 W/m2, determine the ratio of sound output power Psound to electrical input power Pelectrical. Psound Pelectrical
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QUESTION 1 In a private office, the fire alarm sound level should be a minimum of dB, and dB above ambient. In a residential bedroom, the fire alarm sound level should be a minimum of dB.