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Two sound waves of slightly different frequently have amplitude ratio `11//9`. What is the different of sound levels in decibels of maximum and minmum intensities head at a point ?A. 100B. 10C. 16D. 20 |
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Answer» Correct Answer - D `SL_(2) - SL_(1) = 10 log (l_(max))/(l_(min)) = 10 log [((sqrtl_(1) + sqrtl_(2))^(2))/((sqrtl_(1) - sqrtl_(2))^(2))]` `=10 "log"(((a_(1))/(a_(2))+1)^(2))/(((a_(1))/(a_(2))-1)^(2))=20dB` |
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