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Mic/Earphone Headsets

From: Bruce Chadwick <nospam.bpc1@columbia.edu>
Date: Sat Jun 27 11:27:44 1998
Newsgroups: comp.sys.wearables

Wearable People-

I was in Sharper Image the other day and saw the TalkAbout walkie
talkies which are rather nice.

What especially appealed to me about them was the speaker-microphone
headset.  You know, the ones that look like walkman headsets, but with a
microphone that swivels out in front of your mouth.  This one was very
nicely designed to be black and lightweight.  It was monaural, but this
is nice, because I often like to have an ear tuned to the real (i.e.
immediate) world.

I have been thinking about one of these things for some time as I
explore videoconferencing and distance teaching/consulting.  This leads
me to a three questions: one is a specific problem I have, the other two
are broader questions.

Problem.  I bought the headset, figuring I could hook the 1/16"
microphone output to a pre-amp and input it to my Mac PB1400 sound input
port (which require line-voltage input, hence the pre-amp).  In
addition, the 1/16" plug needed a size adapter to bring it up to the
1/8" miniplug standard.

Maybe I have the output design wrong.  The headset has two jacks out,
both embedded into a plastic plug holder which keeps them a fixed
distance (about 1/2 inch) apart.  One is the standard miniplug (1/8
inch) and the other is a micro-mini plug (1/16 inch and about 3/4 length
of the standard miniplug).  The big one is for the earphone, and I
assume the little one is for the microphone.

However, I can't get any sound from the microphone into the computer. 
Strangely, if I send the earphone jack (this one is 1/8") through the
pre-amp and into the computer, I can talk into the earphone and get the
sort of sound from that I wanted from the microphone, but the mic itself
doesn't give me anything.  I've checked connections, and I've checked
the headset with the TalkAbouts in the store, there are no broken
circuits as far as I can tell.  Could it be that the microphone needs
juice put in from somewhere?

Has anyone else made these conversions or know how the Motorola model
50226 works? (I know that Radio Shack makes one of these things for
computers, but God the thing is ugly... don't want to do
videoconferencing with that if I can help it).

Now the other questions:  who out there has bought an
earphone/microphone headset, what brand, did you like it, and did you
think it expensive.

Secondly, wouldn't it be nice to have a wireless headset, so you weren't
tied to your computer by a wire.  I'm sure this product exists, I've
just never seen or heard of one.  Tips?

Thanks,

Bruce

-- 
Bruce P. Chadwick
Columbia University

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