Assume a loudspeaker broadcasts sound equally in all directions andproduces soun

Question

Assume a loudspeaker broadcasts sound equally in all directions andproduces sound with a level of 110 dBat a distance of 1.75 m from itscenter. (a) Find the loud-speaker's sound poweroutput.
1 W

(b) If a salesperson claims to be giving you 125 W per channel, she is referring to theelectrical power input to the speaker. Find the efficiency of thespeaker, that is, the fraction of input power that is convertedinto useful output power.
2% (a) Find the loud-speaker's sound poweroutput.
1 W

(b) If a salesperson claims to be giving you 125 W per channel, she is referring to theelectrical power input to the speaker. Find the efficiency of thespeaker, that is, the fraction of input power that is convertedinto useful output power.
2%

Explanation / Answer

some one asked a similiar question and got a goodanswer. here's the link: http://answers.yahoo.com/question/index?qid=20080512170536AAWPpDF hope that helps

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