Manfred Schroeder (right) subjectively evaluates the quality of the reverberated sound

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., Credit Line: Bell Laboratories / Alcatel-Lucent USA Inc., courtesy of AIP Emilio Segrè Visual Archives, Physics Today Collection
Abstract/Description: 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.
Subject(s): Laboratories
Equipment and supplies
Control boards (Electrical engineering)
Signal theory (Telecommunication)
Profile portraits
Eyeglasses
Sound equipment & supplies
Schroeder, M. R. (Manfred Robert), 1926-
Credit Line: Bell Laboratories / Alcatel-Lucent USA Inc., courtesy of AIP Emilio Segrè Visual Archives, Physics Today Collection
Catalog ID: Schroeder Manfred F1