The ratio of amplitude of two waves is 3:4. What is the ratio of their:
(i) loudness?
(ii) frequencies?
....from ICSE 2016 question paper.
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Loudness of sound is directly proportional to square of amplitude.
hence, Lα A²
(L1/lL2) =(A/A2)² ⇒(3/4)²⇒9/16
Hence amplitudes are in the ratio 9:16
As we know that frequency of the sound wave has no effect on amplitude.
so, ratios of frequency remains same that is 1:1
hence, Lα A²
(L1/lL2) =(A/A2)² ⇒(3/4)²⇒9/16
Hence amplitudes are in the ratio 9:16
As we know that frequency of the sound wave has no effect on amplitude.
so, ratios of frequency remains same that is 1:1
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