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(1) The distance to a source of sound is decreased by a factor of 3. (a) By what factor does the intensity change? (answer: 9 times increase) (b) By how many decibels does the decibel level change? (answer: 9.5 dB increase)

(1) The distance to a source of sound is decreased by a factor of 3. (a) By what factor does the intensity change? (answer: 9 times increase) (b) By how many decibels does the decibel level change? (answer: 9.5 dB increase)

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Sound Intensity and Decibel Level Exercises (1) The distance to a source of sound is decreased by a factor of 3. (a) By what factor does the intensity change? (answer: 9 times increase) (b) By how many decibels does the decibel level change? (answer: 9.5 dB increase) (2) Sound 1 has an intensity of 38.0 W/m2. Sound 2 has a decibel level 2.5 dB greater than the decibel level of sound 1. What is the intensity of sound 2? (answer: 67.6 W/m2) (3) The decibel level 3 m from a source of sound is 105 dB? What is the decibel level 9 m from the source? (answer: 95 dB)
Transcribed Image Text:Sound Intensity and Decibel Level Exercises (1) The distance to a source of sound is decreased by a factor of 3. (a) By what factor does the intensity change? (answer: 9 times increase) (b) By how many decibels does the decibel level change? (answer: 9.5 dB increase) (2) Sound 1 has an intensity of 38.0 W/m2. Sound 2 has a decibel level 2.5 dB greater than the decibel level of sound 1. What is the intensity of sound 2? (answer: 67.6 W/m2) (3) The decibel level 3 m from a source of sound is 105 dB? What is the decibel level 9 m from the source? (answer: 95 dB)
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