 Wiring a Telephone Microphone |
Halph-Price 
Zombie Algorithm
Registration Date: 22-12-2004
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i have this crazy, industrial orientated idea, of using a microphone from a phone. ......
well anyone know how to do that? wire splicing anything? 
or tips at least, like real things, doubt anyone knows.
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21-04-2005 02:21 |
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@1$-)
unregistered
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how about use a microphone close up to the handset, gotta be easier than rewiring,
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21-04-2005 02:27 |
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Halph-Price
Zombie Algorithm
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but there would be bleed sound.
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21-04-2005 03:30 |
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Nosrac
Bag of Hammers
Registration Date: 15-12-2004
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I've got a buddy who does all his live recording with his wireless phone instead of a mic. He brings the phone around and records stuff off the T.V. and around the house (i.e. banging on garage door etc.), he calls himself and records it on his message system, then he hooks the base headphone output directly into the input on his sound card and then plays back the messages he left himself. Great effect with suprisingly clear sound quality.
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21-04-2005 03:46 |
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Halph-Price
Zombie Algorithm
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hmmm, i got a minidisk for that, i wanted a telephone for the industrial thingy... like th sort of vocal effect in a factory .... just i guess i am gunnna seperate the headset from the mouth piece
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21-04-2005 04:30 |
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thechronic
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Wiring it should be pretty easy.
There are probably two wires coming out of the microphone. Take an XLR male connector, solder pin 2 to one wire and pin 3 to the other. It will have a 99% chance of working 
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21-04-2005 12:25 |
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djfreemc
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Indeed a telephone horn is nothing more then a mic and a speaker. You could even use a jack and just connect the right wires, without having to open up your horn.
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21-04-2005 19:13 |
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thechronic
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I was just thinking that this might not work with all telephone mics, maybe even only with really old ones. I suppose modern phones use back electret condensers and would need some kind of low voltage phantom power. Putting the full whack 48V on them might destroy them.
I'll try to find out which mics are commonly used in phones and how to supply the power to them.
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26-04-2005 14:12 |
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Halph-Price
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dollar store phones, kinda things, but if the phone is hooked up to a sort of phantom power internally, there must be a way to get that, i havn't had time to get one, that's the project for the next 2 weeks, since i am on afternoons.
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26-04-2005 21:45 |
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GreatFisherCat
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24-08-2005 19:16 |
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Halph-Price
Zombie Algorithm
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i found out what type of microphone telephones are. i am right to see them as differnet, there PZM!
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25-08-2005 03:40 |
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Friscko
Aron Tinnitus
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25-08-2005 13:25 |
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Surya
The Robot
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A telephone does bandbass. At least, it used to, I don't know if recent models do the bandpassing still.
The frequency of analogue telephones was, if I remember correctly, between 500hz and 3000khz (or 3500khz)
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25-08-2005 14:08 |
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Friscko
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25-08-2005 14:13 |
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Surya
The Robot
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If you use the same kind of overdrive and distrortion that a telephone generates, yes...
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"In dnb you should make people jump not swim"
- Pieter Frenssen 2004
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25-08-2005 15:08 |
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GreatFisherCat
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yea, there propably is a plugin for making telephone EQ´d sound (heck, there is a plugin for everything), but that is not allways the point 
point is to do new things just for a sake of it, and enjoy about those wonderfull mistakes that may happen in the process
I still value the memories of wondefull noises the Red Sound XSFX -analog effect box did make just before it broke up for good
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25-08-2005 17:02 |
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Halph-Price
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Registration Date: 22-12-2004
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but the TYPE of microphone is a PZM, which are used more for room abince and such, but clear up close, and durable.
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26-08-2005 01:55 |
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GreatFisherCat
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PZM microphones are used for recording ambience. But I promise you, microphone inside phone is not designed to recording ambience, quite contrary it is designed to capture sound from distance of few inches and quite directly from front of the microphone. PZM is just a ground technology, microphone design defines more specific features.
Also note, that frequency limitations of telephone transmission are not necessarily done directly from microphone. Mic may capture more wider frequency range, and phone contains filters or EQ circuits, that participate into frequency bandwith tuning. So your project is very interesting, your results are propably something you did not expect, but exciting nevertheless
If you want to build a good microphone for recording room ambience, please see liks I posted before, and check all kind of wonderfull components Digi-Key sells:
http://www.digikey.com/scripts/DkSearch/...US&Cat=30344058
You _Should_ be able to change mic component into something else than suggested Panasonic WM-61A, as long as you make sure that electronical specifications (Impedance, Current, Rated Voltage) do not change (atleast too much). If you either know your electronics or know someone who does, it is also possible to re-calculate the circuit board components again.
Worst case scenario is that you fry your mic, so that it is not a catastrophy (except from microphone´s opinnion) 
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26-08-2005 11:54 |
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thechronic
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If they actually use PZMs in telephones it will probably not sound telephone like at all if you listen to them directly.
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26-08-2005 12:28 |
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