What happens, in decibels (dB), when we multiply sound intensity by 10? If we quadruple (multiply by 4) the intensity of a sound, what is the change in decibels?

PHYS 152—Physics of Sound and Music Fall 2022, (Dr. D.)

Problem 1: What happens, in decibels (dB), when we multiply sound intensity by 10?

Your answer here: the sound intensity changes by ______dB

Write down the equation that shows how this works

Problem 2: If we quadruple (multiply by 4) the intensity of a sound, what is the change in decibels?

Your answer here: ______dB

Problem 3: If sound intensity changes by -3 dB by what factor does intensity change?

Your answer here: _____

Problem 4: If sound intensity increases by a factor of 20, it increases 13 dB. Show an alternate way to derive the decibel (dB) increase (beyond simply using the formula from problem 1):

Problem 5: In class we saw a figure showing the Inverse Square Law. Recreate the graph below and be sure to write in labels and units. Write down, below, how you and your lecture neighbors interpret this figure (as part of a think/pair/shar