Questions
A small speaker delivers 2 W of audio output at what distance from the speaker will one detect 120 dB intensity sound (Given reference intensity =
detailed solution
Correct option is C
Loudness of sound is given by dB=10logI/I0 ⇒120=10logI/I0 ⇒120=10logI×1012 ∴I=1 W/m2 Also , I=P/4πr2 ⇒I=24πr2 ⇒r2=12π ⇒r=12πm=0.399m ⇒r =40 cmTalk to our academic expert!
Similar Questions
Two loud speakers are being compared, and one is perceived to be 32 times louder than the other. What will be the difference in intensity levels between the two when measured in decibels?
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