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Speach through microphones

 
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dspusa



Joined: 09 Sep 2006
Posts: 13
Location: Colorado
PostPosted: Tue Sep 26, 2006 3:36 am    Post subject: Speach through microphones Reply with quote
Microphones and loudspeakers are electromechanical objects. At their hearts there is a coil of wire (the voice coil) and a magnet (the magnet). Speaking causes sound vibrations to travel outward from your mouth. Speaking into a moving-coil (aka dynamic) microphone causes the voice coil to move within a magnetic field. This causes a voltage to be developed and a current to flow proportional to the sound -- sound has been captured. At the other end of the chain, a voltage is applied to the loudspeaker voice coil causing a current to flow which produces a magnetic field that makes the cone move proportional to the audio signal applied -- sound has been created. The microphone translates sound into an electrical signal, and the loudspeaker translates an electrical signal into sound. One capturing, the other creating. Everything in-between is just details. And in case you're wondering: yes; turned around, a microphone can be a loudspeaker (that makes teeny tiny sounds), and a loudspeaker can be a microphone (if you SHOUT REALLY LOUD).

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Last edited by dspusa on Wed Dec 10, 2008 1:10 am; edited 1 time in total
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hvietsp



Joined: 09 Oct 2006
Posts: 2
Location: Korea
PostPosted: Mon Oct 09, 2006 7:53 pm    Post subject: Speech Recognition Reply with quote
Is there anyone who's research on and interested in Speech Recognition in our 4fum???
We can discuss some problems about it.
I make shortly introduce about me. I am Master student in Korea in DSP and my research is Speech Recognition or Speech Source Localization on Human-Robot Interaction. My research concentrates on Speech Recognition with only three microphones using Blacfin board or ARM board.
I am so happy to discuss with others about it. Laughing
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audiodsp



Joined: 15 Nov 2006
Posts: 19
PostPosted: Fri Jan 25, 2008 3:26 am    Post subject: Reply with quote
I agree we need to expand on this subject this is going to be my major.

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