Converting from sound to electrical energy?

Thread starter cuztomized
Start date Nov 25, 2005
Tags

Electrical Electrical energy Energy Sound

AI Thread Summary

Converting sound energy to electrical energy can be achieved using microphones, which are common devices that perform this function. A more innovative approach involves piezoelectric polymers, which can convert sound vibrations into electrical energy efficiently. Researching the mechanics of these technologies can provide insights into practical applications for a science fair project. Exploring these methods can lead to a deeper understanding of energy conversion processes. Utilizing microphones or piezoelectric materials could be effective solutions for the project.

Nov 25, 2005

cuztomized

Hi, I have this topic for a science fair that involves converting sound energy to electrical energy.

Is there any simple way to do this? I tried googling, but ended up getting methods that I can't possibly do.

Any help is appreciated. Thx.

Physics news on Phys.org

Nov 25, 2005

russ_watters

Mentor

Insights Author

Look into how a microphone works. Perhaps more interesting than a basic microphone, a specific, relatively new type uses piezoelectric polymers - google them.

Thread 'Free surface problem in electrohydrodynamics'

I'm thinking about the following problem. I have an electrified fluid with a constant charge density, Q, within the fluid. Will this necessarily yield a surface charge? Would I have to compute it by looking at the displacement fields on either side of the interface? Would it change if the bulk charge within the fluid remains constant?

View full post »

Thread 'Maxwell stress tensor'

This is from Griffiths' Electrodynamics, 3rd edition, page 352. I am trying to calculate the divergence of the Maxwell stress tensor. The tensor is given as ##T_{ij} =\epsilon_0 (E_iE_j-\frac 1 2 \delta_{ij} E^2)+\frac 1 {\mu_0}(B_iB_j-\frac 1 2 \delta_{ij} B^2)##. To make things easier, I just want to focus on the part with the electrical field, i.e. I want to find the divergence of ##E_{ij}=E_iE_j-\frac 1 2 \delta_{ij}E^2##. In matrix form, this tensor should look like this...

View full post »

Thread 'Applying the Gauss (1835) formula for force between 2 parallel DC currents'

Please can anyone either:- (1) point me to a derivation of the perpendicular force (Fy) between two very long parallel wires carrying steady currents utilising the formula of Gauss for the force F along the line r between 2 charges? Or alternatively (2) point out where I have gone wrong in my method? I am having problems with calculating the direction and magnitude of the force as expected from modern (Biot-Savart-Maxwell-Lorentz) formula. Here is my method and results so far:- This...

View full post »