Help with finding a compatible headset microphone for E-Prime SRbox

Mon Apr 7 19:14:26 UTC 2014

Hi,
Oomph, I stand corrected - it's clear my fiddling with a screwdriver on the
sensitivity control of the SRBox has been too long ago - good to know :)

Headset mics - I do know this - tend to be connected to the mic (red) rather
than line (light blue) input of one's GOF audio interface, if that helps. 

Best,
Michiel

PS: what happened to my text? "microphone - weâ EURO (tm)re not really"

-----Original Message-----
From: e-prime at googlegroups.com [mailto:e-prime at googlegroups.com] On Behalf
Of David McFarlane
Sent: 07 April 2014 21:59
To: e-prime at googlegroups.com
Subject: RE: Help with finding a compatible headset microphone for E-Prime
SRbox

Actually, based both on my own tests and information I got from PST Support,
the SRBox takes input from a dynamic microphone (using, as already noted, a
two-conductor tip-sleeve connector arrangement).  The dynamic microphone
provides a weak "mic-level" signal, and the SRBox then supplies any required
preamp or amp stage.  If you put a preamp between the mic and the SRBox,
then you will boost the mic-level signal to line-level, and this will almost
certainly overdrive the input to the SRBox.  Not what you want.

So you need an unbalanced, non-powered microphone that produces an output
signal at about the same level as a dynamic mic (see the Wikipedia article
on microphones if you need background info, this gets complicated!).  I have
no idea what headset mics would provide that, but perhaps armed with this
technical info you can contact a local sound engineer and they could steer
you in the right direction.  And when you get an answer, please post it back
here for the rest of us!

-- David McFarlane

At 4/7/2014 12:33 PM Monday, Michiel SovijÃ¤rvi-Spape wrote:
>Hi,
>If I remember correctly, one needs a microphone with pre-amp; I suspect 
>you might well get good results with even a fairly low quality headset 
>microphone - weâ EURO (tm)re not really talking high fidelity audio 
>capture here, as long as the signal is higher than the noise. Thatâ 
>EURO (tm)s of course the issue with soft-speaking
>participants: if their breathing is about as loud as their voice, itâ 
>EURO (tm)s not going to become brilliant even if you tweak the 
>sensitivity of the SRBOX (thereâ EURO (tm)s a thing or two about in our 
>E-Primer). Another thing thatâ EURO (tm)s often only clear once youâ 
>EURO (tm)re halfway through your experiment, is that the onset of vocal 
>audio differs drastically depending on the word; so if you have a 
>Stroop test, â EURO oePurpleâ EURO , has a nice, loud onset with the 
>popping P sound (annoying for audio engineers), whereas might only 
>register at the â EURO oeDâ EURO .
>
>Well, itâ EURO (tm)s been a while since I last did anything with the 
>voicekey, please do let us know what your experiences are!
>Best,
>Michiel SpapÃ(c)
>
>From: e-prime at googlegroups.com
>[mailto:e-prime at googlegroups.com] On Behalf Of Alain Desrochers
>Sent: 06 April 2014 14:12
>To: e-prime at googlegroups.com
>Subject: Help with finding a compatible headset microphone for E-Prime 
>SRbox
>
>With the purchase of an E-Prime SRbox I received an Audio-Technica 
>microphone (Model ATR20) with a desk stand. I am now looking for a 
>headset microphone model that is compatible with the 2-pole plug of the 
>SRbox. Has anyone in the E-Prime user community found such a microphone 
>model? Also, in your experience, does a headset microphone resolve the 
>problem of capturing responses from participants with a very soft 
>voice? Thank you for taking the time to share your recommendations with me.
>
>Alain Desrochers, School of Psychology, University of Ottawa, Canada

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