Emilio Segrè Visual Archives

More than 30,000 photos of scientists and their work

Schroeder Manfred F1

Share This


Schroeder Manfred F1

How will you use this image ?
Select one of the following options.
Individual Use
Not-for-profit Use
For-profit Use (educational only)
Not sure yet

We charge a usage fee per photo if the photo is published, reproduced in a product or publicly exhibited. This is not a license in the legal sense. As a non-profit institution, we do not make any money providing these photographs. It is only by assessing usage fees that we are able to cover the cost of providing publication quality copies of our photos, preserving the photograph collection according to archival standards, and providing access to the collection by maintaining an online image database. The copyright holder may charge a fee in addition to our service fee.

Images are for use in educational projects only and must be used in a respectful manner.

Image title: 
Manfred Schroeder (right) subjectively evaluates the quality of the reverberated sound
Credit line: 
Bell Laboratories / Alcatel-Lucent USA Inc., courtesy of AIP Emilio Segrè Visual Archives, Physics Today Collection

B. F. Logan (left) of Bell Telephone Laboratories adjusts an artificial reverberation filter (unit with hand grips, center) to obtain an all-pass characteristic -- that is, an equal response for sound at all frequencies. Manfred Schroeder (right), who supervises acoustics research at the Laboratories, subjectively evaluates the quality of the reverberated sound. Both researchers are perfecting a truly 'colorless' artificial reverberator.

Original format: 
1 photographic print (black and white; 8 x 7.5 inches)
Schroeder, M. R. (Manfred Robert), 1926-