A trumpet creates a sound intesnity level of 9.4e10^1 dB at a distance of 1.00m.

Question

A trumpet creates a sound intesnity level of 9.4e10^1 dB at a distance of 1.00m.

(a) What is the sound intensity of a trumpet at this distance?

(b) What is the sound intensity of five trumpets at this distance?

(c) Find the sound intensity of five trmpets at the location of the first row of an audience, 7.70 m away, assuming for simplicity the sound energy propagates uniformly in all directions.

(d) Calculate the decibel level of five trumpets in the first row.

(e) If the trumpets are being played in an outdoor auditorium, how far away, in theory, can can their combined sound be heard?

(f) In practice such a sound could not be heard once the listener was 2-3 km away. Why can't the sound be heard at the distance found in part (e)? hint: In a very quiet room the ambient sound intensity level is about 30 dB.

Explanation / Answer

In theory you get the 600k meters because there is a no background noise or other stuff to drown out the noise. the farther you go the more noise there the sound will encounter and eventually it will be drowned out

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