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Q: Mic and Speaker Feedback ( No Answer,   2 Comments )
Subject: Mic and Speaker Feedback
Category: Science > Technology
Asked by: gigantor282006-ga
List Price: $2.00
Posted: 11 Oct 2006 10:46 PDT
Expires: 10 Nov 2006 09:46 PST
Question ID: 772684
I took apart a voice modulator system and wanted to incorporate it
into my Darth Vader helmet; however, it is giving me feedback because
of the close proximity of the bare mic and speaker.  I heard that
aluminum foil can be used as a damper... Is that ture?  If not, are
there any possible way to eliminate the feedback?
There is no answer at this time.

Subject: Re: Mic and Speaker Feedback
From: stanmartin1952-ga on 11 Oct 2006 11:52 PDT
Generally, a piece of fibreglass insulation covered with aluminum foil
makes a good sound insulator. You might want to provide more details
about the geometry of your system.
Subject: Re: Mic and Speaker Feedback
From: probotics-ga on 18 Oct 2006 20:11 PDT
Feedback eliminator circuits operate by dampening the specific
frequencies associated with the feedback and tend to be specific to
application.  You could eliminate the feedback by putting a low pass
filter in line with the speaker.

Alternatively put the speaker in your chest piece - who says the sound
has to come from the mask?

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