[AUDITORY] Sound proof booth and EEG recording

[Massimo Grassi <massimo.grassi@xxxxxxxx>]

Dear list members,

we are about to buy a IAC soundproof booth and, because here many people 
do EEG recordings, we were thinking to have the booth electrically 
shielded. The booth will be used to run psychoacoustics, cognitive 
science and neuroscience experiments.

Here comes the problem. What is the best way to carry the EEG-signal 
from the inside of the booth to the outside of the booth?

So far we thought two possible solutions.
1. Place a panel on the booth's wall that has (inside and outside) the 
specific plug of the signal cable that comes out of EEG amplifier. In 
practice, we interrupt the signal cable at the booth's wall.
2. Make a hole on the booth's wall. The hole starts high in the inside 
of the booth, runs downward inside the booth's wall and arrives low at 
the outside of the booth. I this way the booth is acoustically safe 
because the hole is not direct and the EEG-signal cable is not 
interrupted, but it needs to be very long (wild guess about 6/8 meters).

Some of my EEG colleagues are unhappy with both solutions because:
1. You interrupt the signal cable and this interruption could introduce 
artefacts in the EEG-signal.
2. The cable is too long and this could introduce artefacts in the 
EEG-signal.

Is there anybody out there that had this same problem and that can 
suggest me which is the best way to solve it?

All the best,
m
--
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