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Author Topic: Any issues with using two microphones?  (Read 541 times)

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Offline MastermimeTopic starter

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Any issues with using two microphones?
« on: June 13, 2012, 12:54:44 PM »
Hello everyone,

I am building a rescue robot and I am wondering if there are any issues when using two microphones instead of one. 

As you can see from the link the transmitter supports the standard RCA connections (one for video, one for left audio, and one for right audio)

http://www.amazon.com/Wolfcom-3000MA-Wireless-Security-Transmitter/dp/B005DUCKUA/ref=pd_sxp_f_pt/186-3436856-2992944

My question is will there be any interfering signals on the receiver end since there will be a different recording from each microphone?

Thanks

Offline MastermimeTopic starter

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Re: Any issues with using two microphones?
« Reply #1 on: June 20, 2012, 07:33:17 PM »
Surely, someone must know..

Offline Soeren

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Re: Any issues with using two microphones?
« Reply #2 on: June 23, 2012, 02:44:01 PM »
Hi,

Surely, someone must know..
Yes, but sometimes shit happens (Like ransome-ware attacks :()

No matter how you transfer the signal (copper, radio or whatever), mixing two signals will produce a third.

Assuming just a whistle (a fairly close sine wave) which hit the two michrophones at an angle from their center, the sound waves will hit at different phases and this will produce a third signal. If you draw two sines with their phases eg. 30° apart, it should be clear to you.

Whether it will be an issue in your situation is hard to say, but if you just want to listen to the sound it's probably OK (if not, just settle for a single mike).
Regards,
Søren

A rather fast and fairly heavy robot with quite large wheels needs what? A lot of power?
Please remember...
Engineering is based on numbers - not adjectives

Offline MastermimeTopic starter

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Re: Any issues with using two microphones?
« Reply #3 on: June 24, 2012, 08:42:49 PM »
Quote
Yes, but sometimes shit happens (Like ransome-ware attacks )
That was a just a comment to refresh the topic   ;)

Quote
Yes, but sometimes shit happens (Like ransome-ware attacks )

No matter how you transfer the signal (copper, radio or whatever), mixing two signals will produce a third.

Assuming just a whistle (a fairly close sine wave) which hit the two michrophones at an angle from their center, the sound waves will hit at different phases and this will produce a third signal. If you draw two sines with their phases eg. 30° apart, it should be clear to you.

Whether it will be an issue in your situation is hard to say, but if you just want to listen to the sound it's probably OK (if not, just settle for a single mike).
Oh I see.  Once again you save me.   Thank you Soeren

 


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