a) The graph shows the US Department of Labor noise regulation for working witho
ID: 1419206 • Letter: A
Question
a) The graph shows the US Department of Labor noise regulation for working without ear protection. A machinist is in an environment where the ambient sound level is of 85 dB, i.e., corresponding to the 8 Hours/day noise level. The machinist likes to listen to music, and plays a Boom Box at an average level of 82.0 dB. Calculate the INCREASE in the sound level from the ambient work environment level (in dB). (**I figured out the answer to part a, I just need help with part b**)
answer. 1.76
b. A student at a rock concert has a seat close to the speaker system, where the average sound intensity corresponds to a sound level of 118 dB. By what factor does that sound intensity exceed the 1.5- Hours/day intensity limits from the graph? (**The answer to this part is NOT 4.728, Please HELP!**)
Explanation / Answer
the graph is not shown
The sound intensity for 1.5- Hours/day from the graph = x dB ( in to the grapg)
A student at a rock concert has a seat close to the speaker system, where the average sound intensity corresponds to a sound level of 118 dB.
1.5 hours/day sound level is x dB
Rock concert sound level is 118 dB (0.63095 W/m²).
find just ratio of this two quantities.
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