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Learning Goal: To understand the decibel scale. What is the sound intensity level , in decibels, of a sound wave whose intensity is 10 times the reference intensity (i.e., I = 1010)? The decibel scale is a logarithmic scale for measuring the sound intensity level. Because the decibel scale is logarithmic, it changes by Express the sound intensity numerically to the nearest integer. an additive constant when the intensity as measured in W /m View Available Hint(s) changes by a multiplicative factor. The number of decibels increases by 10 for a factor of 10 increase in intensity. The general formula for the sound intensity level, in decibels, corresponding to intensity I is JA AEd ? B = 10 log ( T. ) dB, where Io is a reference intensity. For sound waves, Io is taken to be B= dB 10-12 W/m2 . Note that log refers to the logarithm to the base 10. Submit Part B What is the sound intensity level S, in decibels, of a sound wave whose intensity is 100 times the reference intensity (i.e. I = 10010)? Express the sound intensity numerically to the nearest integer. View Available Hint(s) B = dB Submit One often needs to compute the change in decibels corresponding to a change in the physical intensity measured in units of power per unit area. Take m to be the factor of increase of the physical intensity (i.e., 1 = mlo). Part C Calculate the change in decibels ( AB2, AB4, and AB8) corresponding to m = 2, m = 4, and m = 8. Give your answers, separated by commas, to the nearest integer--this will give an accuracy of 20%, which is good enough for sound. View Available Hint(s) AB2, B4, AB8 = dB Submit