The Analog Impedance Meter – Tools of the Trade
By Pat Brown
This article gives an overview of the TOA ZM-104…
2010 NFPA 72
By John Murray.
If anyone has a chart or formula for adding a higher noise level to STI results measured at a lower noise level, I would be most interested in using it
TetraMic™ – Sights and Sounds of Commonwealth Stadium
A mic array allows the realism of a college football rivalry to be captured
Reliable Computing
By Ray Rayburn
Reliable Computing - Ray Rayburn shares some valuable…
What's in a word?
By Ray Rayburn
Sincere
Is it always meaningful to talk about T60?
by Ray Rayburn
In this article, Ray Rayburn helps us understand…
Low-Frequency Loudspeakers Cancellation – Black Hole Sum
By Dale Shirk
At the Loudspeaker Arrays Workshop, Kurt Graffy…
Manifold Drivers – How Much Additional SPL is Realized.
Two drivers can be manifolded onto a single horn to achieve increased acoustic output. But "how much "is not as straightforward as one might think.
Polarity 101 – Some subtleties regarding device polarity
Since most sound reinforcement equipment uses bipolar power supplies (allowing the audio signal to swing positive and negative about a “zero” reference point), it is possible for signals to become inverted in polarity (flipped over).
Understanding Horn Directivity Control
Pattern control is essential in sound reinforcement systems. The beamwidth of a horn is determined by some key size/wavelength relationships. Charlie provides a short history and an overview of the math.