The sound intensity from a jack hammer breaking concrete is 2.40 W/m2 at a distance of 1.90 m from the point of impact. This is sufficiently loud to cause permanent hearing damage if the operator doesn't wear ear protection. What is the sound intensity level for a person watching from 42.0 m away?

A source of sound emits 5.0 mW of acoustic power uniformly in all directions.Calculate the intensity of this sound wave 10.0 m from the source. The answer will be X.XX 10-6 W/m2

Recent research has shown that the use of earbud-style headphones packaged with MP3 players can cause permanent hearing loss. (a) The intensity of the sound from the speakers of a certain MP3 player (without earbuds) is measured at 3.8 x 10-5 w/m2. Find the decibel level. (Round your answer to the nearest whole number.) dB (b) If earbuds are used with the MP3 player in part (a), the decibel level is 90 dB. Find the intensity. (Round your answer to three decimal places.) W/m2 (c) Find the ratio of the intensity of the sound from the MP3 player with earbuds to that of the sound without earbuds. (Round your answer to one decimal place.)

Two sound waves have intensities of 1 times 10 to the -5 W/m2 and 5 times 10 to the -4 W/m2. What is the difference in their intensities levels (db)? I0 = 10 to the -12 W/m2.