Re: placing microphones...

["psghome2002" <psghome@xxxxxxx>]

Round 2...

I also put in mics in most rooms for voice recognition. I did a LOT 
of research and eventually put in Crown PZM11 wall mics. They're 
fairly inobtrusive and based on the US 'J Box' size format (you can 
use a J Box or just cut a hole in the wall and use rawl plugs for 
the screw fixing - I did both).

The mic quality is great - it's a pressure zone mic and designed to 
pick up voice frequencies (has a bit of bass roll-off to cut HVAC 
noises etc). I fed these via standard mic cable (very important to 
use good quality cable) which is screened (doesn't cost a great deal 
either) into a Shure SCM810 intelligent mixer. This mixer supplies 
+48V phantom power to the mics. It automatically senses which mic 
has the loudest input and switches to that source. Also has a logic 
input so you can do some clever stuff linked to HomeVision etc.

Shure web site (www.shure.com)
Crown web site (www.crownaudio.com)

Shure has a good document on why you SHOULD NOT place mics on the 
ceiling:

http://www.shure.com/support/technotes/app-ceiling.html

Mics will pick up all noise in the room, so depends on what you want 
to do with it.

I'm planning to try and create a whole-house hands-free telephone 
system. Don't know how successful it'll be though.

I put a couple of pics on the Yahoo group Photos area - mic and 
keypad for audio system - Under subject 'Pauls mics'

Let me know if you want more info.

Paul.



--- In ukha_d@y..., "Nikola Kasic" <nikola@k...> wrote:
> Along with speakers, I plan to put microphones in each room as 
well.
> My main question is: what kind of cable I should put in and what's
the
> longest run I can use before degrading signal?
> Also, where should I place microphones, relative to the speakers, 
in order
> to avoid feedback and echoing?
> If speaker is close to the microphone and music is coming out of 
it, will I
> have to yell in order to be heard by microphone?
> I know that there are very few people with installed microphones 
in this
> group. Can they come forward and tell me what's their experience, 
which
> cables they used and where did they place microphones.
> Cheers,
> Nik

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