by John Eargle Editor’s Note: Written by John Eargle, and republished courtesy of Harman Professional, this article is Chapter 1 of a book he co-authored with Chris Foreman entitled “Audio Engineering for Sound Reinforcement”. Eargle, who passed away in 2007, was JBL’s Vice President of Engineering for many years and became a well-known author and consultant. He was a skilled recording engineer responsible for more than 250 CD releases and his work in cinema sound brought him a Technical Oscar in 2001. Eargle’s many books on audio and acoustics are industry benchmarks and we are pleased to bring Pro...Read More
Author: Chris Foreman
by Kevin Young If someone had taken Stan Miller aside 40 years ago and told him how much of his career he’d spend on tour with Neil Diamond, he likely wouldn’t have believed it. “I remember driving the bus for a Johnny Cash tour and some members of the band saying they’d played with Johnny for 20 years. I thought, that’s a long time.” Now, however, after over four decades with Diamond. “it actually doesn’t seem that long.” In all that time, Miller has never missed a gig. When he suffered a heart attack at age 37, Diamond actually...Read More
by Chris Foreman Stan Miller founded Stanal Sound in the early 1970s and became one of touring sound’s best known and most influential audio engineers and business owners. Stanal Sound provided concert sound for a long list of well-known artists including Neil Diamond, Johnny Cash, John Denver, The Supremes, the Young Americans and many others. Starting his company in the early days of the industry, Stan pioneered tour sound innovations including hanging systems, fiberglass-covered loudspeaker cabinets and molded fiberglass horns and he was influential in the development of Yamaha’s PM Series mixing consoles, JBL’s Concert Series and Vertec line...Read More
by John Eargle, James B. Lansing Sound, Inc. – as published in R-e/p Magazine October, 1981 Most practical loudspeaker systems do not exhibit minimum phase performance. Rather, we might view their response as the combination of an ideal system whose performance is minimum phase, operating in series with an all-pass (no attenuation) network providing the phase error observed in the system’s response. It is this phase error that we would like to minimize. As long as any loudspeaker behaves like a band-pass filter, it will exhibit a unique phase response that is related to its amplitude response. If the...Read More
by Michael Rettinger – as Published in Re/p Magazine, August 1980 Since the late 1970’s recording studios have increasingly relied on so-called bass traps in their walls, ceilings and floors to control low-frequency absorption of sound. Broadly defined these bass traps are cavities or recesses of various dimensions, lined with one- or two-inch thick, vertically suspended, free hanging, glass fibre panels. The face of the opening is covered with a thin layer of material (grid cloth), and when installed as a pit in the floor is covered with a substantial mechanical grid capable of bearing typical floor loads. Design...Read More
- Comments on the importance of the early-to-reverberant sound-energy ratio, “Clarity,” in speech and music acoustics, related to use of sound-reflecting panels with attention to data in Dr. Leo L. Beranek’s three concert-hall books.
- The Early-To-Reverberant Sound-Energy Ratio In Concert Hall Acoustics
- An Autobiographical Assessment of the Importance of the Early-to-Reverberant Sound-Energy Ratio, “Clarity,” in Speech Acoustics.
- History Repeats Itself: Boston’s Hatch Shell, New York City’s Holy Apostles Church, Albert Einstein, Joseph Albo, and Variable Time
- “Speech Intelligibility – a JBL Professional Technical Note” Technical Notes Volume 1, No. 26