# Homework Help: Calculating Energy in Sound Wave

1. Nov 22, 2011

### lhphysics

1. The problem statement, all variables and given/known data

How does the sound energy level produced by woodwind instruments (a piccolo, a clarinet, and a bassoon) compare to the sound energy level produced by string instruments (a violin, a cello, and a double bass) and brass instruments (a trumpet, a trombone, and a tuba)?

I am doing a group 4 IB physics project in which I attempt to answer the above question.

I need a straightforward, quick response that will give me an equation to calculate the energy present in the different waves.

I am using a scope that will allow me to determine the frequency, amplitude, speed, and wavelength of each instruments wave and I need to somehow relate the energy present in the wave to the data I am able to collect.

2. Relevant equations

I know that E=1/2kA^2 but my problem with this equation is that I am not sure how I would determine what the value of k is for each wave.

3. The attempt at a solution

As mentioned above, I have tried to look into the E=1/2kA^2 equation but am having difficulty with the value of k. I have searched in every spot I could think of to help with this and have returned empty handed. Any guidance in the correct direction would be appreciated.