Sign up for FREE

Sound Relative Intensity

Last updated over 2 years ago

3 questions

Required

1

Question 1

1.

As a jogger hears the bark of an approaching dog, the sound reaching her ears has an intensity of 4.19 × 10^-7 W/m^2. What is the relative intensity level of the barking?

Required

1

1

Question 2

2.

A girl stands 4.1 m from a radio whose sound output is 9.17 × 10^-6 W. What is the relative intensity level of the sound she hears?

Question 3

3.

Challenge: A would-be burglar trips an alarm that emits 1.77 × 10^-4 W of sound power. How far away will the burglar have to run before the relative intensity level of the alarm will dwindle to 65 dB?