Wednesday

August 27, 2014

August 27, 2014

Posted by **Abdul** on Monday, January 28, 2013 at 10:05am.

Name the four corners of the rectangle A, B, C and D. The long sides are AB and CD, and the short sides are BC and DA.

Assume that there are noise sensitive receivers at the three following points:-

A house at point B

A first aid point at the midpoint along the side CD.

A school 20m from the midpoint of the line AB.

The noisy rides must be separated by distances of at least 60m.

You are looking for a site layout which will have the lowest noise levels at the three noise sensitive receivers. Note that it is the highest of the three noise levels which matters; you are looking for a layout which achieves the lowest value for the highest of the three noise levels. You should include with your answer any graphs you produce in your search for the lowest noise levels.

You will need to use the following equations:-

Lw= Lp+20log10(r)+8

Where Lw is the sound power level (dB(A)) at the source And Lp is the sound pressure level (dB(A))at a distance r(in metres) from the source.

The sound pressure levels must be added using the following formula:-

Ltotal=10log10(Summation10^(L/10)). [Under the summasation there is a j written].

I have no idea what to do! Please help!!!

- Engineering Math -
**Anonymous**, Saturday, February 2, 2013 at 10:30amLJMU i bet u

- Engineering Math -
**Michelle**, Monday, February 4, 2013 at 9:36amlol

- Engineering Math -
**Michelle**, Monday, February 4, 2013 at 9:37amsorry didn't mean to lol but it is lol

**Related Questions**

Engineering Math - A Theme Park site is being designed. It will occupy a ...

English - 1. It is noisy outside. 2. It is too noisy and we can hardly hear each...

English - I have to design a theme park based on Julius Caesar. I need creative ...

math - Larry and Shamir want to build identical houses. They bought a ...

Physics - A 5.0 kg shell is fired vertically upward. At its max height of 350.0 ...

physics - There is a 1500 mile race course. The max foward acceleration is 4 m/s...

physics - There is a 1500 mile race course. I MUST have a top speed of 36 ...

math - five square flower beds of side 1m us dug on a rectangular piece of land ...

math - There is a rectangular piece of land that measures 40ft by 70 ft in the ...

math - There is a rectangular piece of land that measures 40ft by 70 ft in the ...