A woman stands a distance d from a loud motor that emits sound uniformly in all directions. The sound intensity at her position is an uncomfortable 3.9×10-3 W/m2. At a distance 2.1 times as far from the motor, what are (a) the sound intensity and (b) the sound intensity level relative to the threshold of hearing?

(a) What is the intensity (in W/m?) of a sound that has a level 3.00 dB lower than a 4.03 x 10-9 w/m? sound? W/m? (b) What is the intensity (in W/m2) of a sound that is 10.0 dB higher than a 4.03 x 10-9 W/m? sound? W/m?

The sound intensity of a conversation at a distance of 5.0 m is 1.7 x 10-7 W / m^2 . Determine the intensity at a distance of 7.0 m. Presume the sound spreads evenly in all directions.

Problem #4: What sound intensity level in dB is produced by earphones that create an intensity of 4.00 x 10-2 W/m2? Problem #5: What is the intensity of a sound that has a level 7.00 dB lower than a 4.00 × 10–9 W/m2 sound? Problem #6: What is the intensity of a sound that is 3.00 dB higher than a 4.00 × 10–9 W/m2 sound? Problem #7: If a large housefly 3.0 m away from you makes a noise of 40.0 dB, what is the noise level of 1000 flies at that distance, assuming interference has a negligible effect?