in his career, John
Prohs (along with then student Tony Zagnich)
developed a prototype time-gated spectrum analyzer
pioneering the way for commercial multiprocessor based spectrum analyzers
prevalent today. He presented a paper on it at the 57th Audio
Engineering Society convention titled Utilization of a New Time Gated
Spectrum Analyser to Measure Sound System Effectiveness and received a standing ovation.
|| He developed a fully three
dimensional distortion free array mapping system used for designing sound
reinforcement systems. And he co-authored the software known as the PHD(tm)
program, with David Harris, used by sound system designers around the world for many years.
The October 1984 issue of Sound and Communications
Magazine cover article, Sound
System Design Prohs and Cons, featured the PHD(tm)
Program and the mapping method developed by John Prohs.
one entire chapter of the well-known book, Sound System Engineering
( Editions One and Two) by
Don and Carolyn Davis was devoted to it.
Another well regarded book, The Handbook
for Sound Engineers Third Edition by Glen Ballou page 1142 also refers
to the program..
was Technical Director of the Ambassador Auditorium in Pasadena,
approved the acoustical
design and oversaw the installation of all the technical systems in it.
The auditorium drew the top artists in their field, including the
late pianist Vladimir Horowitz, the Vienna Symphony, opera star Luciano
Pavarotti, and the singer Pearl Bailey. And a number of network
television specials were held in the auditorium.
the same time, he also served as Technical Coordinator for one of the
world's largest annual conventions -- overseeing the technical crews for
the 28 US sites and providing consulting for the convention's 57
international locations. These sites were set up with video
projection, and state of the art sound reinforcement systems. Many
accommodated over 8000 people. They were linked to a live satellite
transmission originating in the U. S. on the opening day.
his reputation grew, John was increasingly called on to redesign the
permanent sound reinforcement systems for various arenas and convention
formed and managed the Ambassador Technology Group. He led his
team in the development of a wide variety of innovative technical solutions including
a remote call forwarding system, color video distribution on standard
telephone lines, and a state of art facilities security access control
leaving Pasadena in 1998, he
worked for EIS (aka Intellisys) in Northern California. On his first project with
utilized a new acoustical auralization method for the Sony Metreon in San
Francisco, as well as designing the sound systems and show control systems
for the “Wild Things”.
continues to find ways to provide better designs. He created his own more accurate tools for calculating conduit fill, heat load,
wire loss and loudspeaker attenuation. And he developed a portable highly
directive efficient sound source for analyzing building acoustics, as well
as an improved
microphone fixture for doing polar energy time curves.
John served as guest editor for the AES
Spectrometry a 279 page anthology of the late Richard C. Heyser.
He also was a guest instructor for several Syn- Aud-Con workshops
including one titled Engineering Loudspeaker Arrays. John,
along with industry notables Dr. Eugene Paronis of Georgia Tech, David Klepper of
KMK and Ted Uzzle of Altec Lansing, conducted it in 1982.
joined the international technology consulting firm of Shen, Milsom, Wilke
- headquartered in New York - in 2000.
was asked to head up Shen Milsom & Wilke Inc’s sound reinforcement systems research activities and auralization
studies and serve as an audio systems consulting
the SMW offices
In addition, he has completed numerous major AV design projects for SMW.
several years with SMW, John formed his own consulting firm.
recognized by his peers for his expertise and contributions to the field
-- John Prohs' capabilities speak for themselves.