Here's the synopsis of what I need done:

I have a laptop, a microphone, and speakers. I am going to be using the laptop to run a voice altering program, which will dynamically project the altered voice over the speaker (as in, while I am speaking.) However, if I turn up the speaker volume as high as I need it to be, I start getting feedback. How could I go about getting rid of the feedback? I know they make special paired microphones that virtually eliminate feedback, but I don't know how much they cost or where to get them. Is there another solution? Eventually, the mic will be put inside a costume helmet while the speaker will be on the outside projecting the voice. Could I install some kind of sound deadening inside the helmet to prevent the mic from picking up the speaker's sound?

Thanks for any help.

Usually feedback is caused by the microphone being too close to the speaker, with teh gain of the mic being up too high as well.

Sound deadening might work

You're going to strap a laptop to your costume??

what kind of mic? you need a preamp im guessing. your not getting enough signal from the mic.

They make feedback-cancelling processors for vocalists and such. I assume you're going to be stationary while speaking?

Yes.

what kind of mic? you need a preamp im guessing. your not getting enough signal from the mic.

One of the standard computer microphones. I don't think I will need a preamp for that. I've used the voice altering software before just fine, but I had the program's duplex turned off, so no sound came out of the speakers. It worked fine there, but now that I need to have it play while simultaneously talking, I would get feedback.

They make feedback-cancelling processors for vocalists and such. I assume you're going to be stationary while speaking?

That's a negative. For the record, we are making a stormtrooper armor, and we want to make it sound like whoever is in it is a sotrmtrooper.

Computer microphones are usually very poor quality, youll get distortion and that is what i think you might be hearing, but if its feeding back try and get a directional mic.

Yes.



One of the standard computer microphones. I don't think I will need a preamp for that. I've used the voice altering software before just fine, but I had the program's duplex turned off, so no sound came out of the speakers. It worked fine there, but now that I need to have it play while simultaneously talking, I would get feedback.



That's a negative. For the record, we are making a stormtrooper armor, and we want to make it sound like whoever is in it is a sotrmtrooper.

Oh. That is simple. You just need a throat mic which runs through a pocket amplifier with clipping diodes for light distortion and maybe a capacitor or two to alter the EQ with. Shouldn't be too complex. Lots of schematics on the intarwebs.

You might have to modify the helmet a bit to further isolate the mic from the speaker, but I kinda doubt it.