Baylor University has a Black Gospel Music Restoration Project. In order to digitize the materials, the library built a sound isolation booth in February 2007. The library has photos of the booth's construction on its web site. The library does not provide links about the Wenger sound isolation booth, but a quick search located information the company and its isolation booth product.
Thanks to Kim Ewart for pointing on the photos on the Baylor web site.
Technorati tag: Digitization