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Re: Subtracting regularly repeating sounds

Dear Kyle,

I dont have experience with MRI scanner sounds in particular, but it seems like such a structured interfering source should be a good match for the exemplar-based source separation techniques I have been using over the past few years. You can find more information on my website, www.amadana.nl , as well as a demo (matlab) and some links to related techniques that may be of use.

Feel free to contact me directly if you think this can be of use, then we can give it a try.

Jort Gemmeke
Postdoctoral Researcher
KU Leuven, ESAT-PSI Speech group

Date:    Wed, 19 Sep 2012 16:59:06 -0400
From:    Kyle Jasmin <kyle.jasmin.11@xxxxxxxxx>
Subject: Subtracting regularly repeating sounds

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Dear all,

I wonder if anyone has successfully removed the sound of a helium pump from
auditory recordings made in an MRI scanner. It occurs regularly (every 1s),
and changes over time (Praat thinks it is a formant with downward
trajectory). Any advice is appreciated on subtracting regularly repeating
sounds would be appreciated.

With thanks,

Kyle Jasmin
Speech Communication Laboratory, UCL Institute of Cognitive Neuroscience
& Laboratory of Brain and Cognition, National Institute of Mental Health