ear defenders/sound attenuation (Gerry Stefanatos )


Subject: ear defenders/sound attenuation
From:    Gerry Stefanatos  <gstefana@xxxxxxxx>
Date:    Tue, 7 Feb 2006 17:08:30 -0500

Hi all: I was wondering if I could tap the collective expertise of this Listserv to help resolve a problem that has reemerged. We are conducting an fMRI study examining speech perception in normal controls and in individuals who are recovering from aphasia. Like several other labs, we have tried to mitigate the influence of scanner noise by inserting electrostatic transducers in industrial ear defenders. We found that both 3M and Bilsom produce defenders that work well in this regard. However, we have recently upgraded the coil in our scanner, and unfortunately there is now insufficient room to have subjects wearing our modified eardefender/electrostatic headsets. I hope I can avoid a lot of trial and error by asking if anyone has recommendations on slimline eardefender's or other sound attenuation techniques/materials that may enable us to continue to use our electrostatic headphones. Your input would be most appreciated. Thanks. Gerry Gerry A. Stefanatos, D. Phil. Director, Cognitive Neurophysiology Laboratory Moss Rehab Research Institute Albert Einstein Medical Center 1200 W. Tabor Rd. Philadelphia, PA 19141 Tel: (215) 456-5962 Fax: (215) 456-5926


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DAn Ellis <dpwe@ee.columbia.edu>
Electrical Engineering Dept., Columbia University