Chapter 17505(b)If the frequency is reduced to ′ =ff2while the displacement amplitude is doubled, the newintensity isIvfsvfsI2222222122=FHGIKJ==πρmaxmaxbgor the intensity is unchanged .*P17.23(a)For the low note the wavelength is λ=vf343146 8234mssm...For the high note 3438800390smWe observe that the ratio of the frequencies of these two notes is 880599Hz146.8 Hz=.nearlyequal to a small integer. This fact is associated with the consonance of the notes D and A.(b)β=FHGIKJ=−10107512dB±WmdB2logIgives I=×−316 105. Wm2IPvP==−∆∆maxmax.25221203430161ρWmkgmPa23ejfor both low and high notes.(c)svfs121242222ρωρ πmaxmaxsIvfmax=2for the low note,smax......=×=×−−−21 203431146 8624 10146 8425 105257kg mm ssm m23πfor the high note,smax..=×−−
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