Acoustic Measurement-
Friday, May 24, 2013Making It Meaningful: Practical Applications Of Loudspeaker Analysis
Ken DeLoria 05/24/13 11:20 AM,Over the years many have debated the relative merits of “looking at screen traces” on an analyzer versus using human hearing to determine how a loudspeaker, or an entire system, actually performs. While both practices are of course valid, it’s… View this post
Filed in: AV • Feature • Blog • Study Hall • AV • Digital • Loudspeaker • Measurement • Signal • System -
Friday, April 05, 2013The Impact That Acoustics Can Have On Sound In Any Room
Pat Brown 04/05/13 08:04 AM,For most humans, there is nothing easier than breathing, seeing, smelling and hearing. We do these things without thought, and even take them for granted. Our senses were given to us to help us exist in a physical universe. They… View this post
Filed in: Church Sound • Feature • Blog • Study Hall • Education • Installation • Measurement • Signal • Sound Reinforcement • System -
Friday, March 15, 2013Using All-Pass Filters To Improve Directivity & Magnitude Response
Charlie Hughes 03/15/13 04:29 PM,We are all familiar (or at least should be) with a low-pass and high-pass filter. As the name implies, they pass one part of the audio spectrum while attenuating the others. They are the basis for loudspeaker crossovers. As with… View this post
Filed in: AV • Feature • Blog • Study Hall • AV • Line Array • Loudspeaker • Measurement • Processor • Sound Reinforcement • System -
Tuesday, February 26, 2013An Examination Of Bandwidth, Dynamic Range And Normal Operating Levels
John Eargle & Chris Foreman 02/26/13 05:12 PM,Audio signals are, of course, speech and music, and in this article we will examine the nature of those signals in terms of their requirements in bandwidth, dynamic range and normal operating levels. The nature of peak and average levels… View this post
Filed in: AV • Feature • Blog • Study Hall • AV • Loudspeaker • Measurement • Processor • Sound Reinforcement -
Thursday, January 31, 2013Analyze This: The Evolution Of The Audio Analyzer
Ken DeLoria 01/31/13 01:30 PM,This is the first installment in a series that will explain how various types of audio analyzers function, how they differ in capability and usage, and the way that the test and measurement industry has evolved over the past five… View this post
Filed in: AV • Feature • Blog • Study Hall • Production • Audio • AV • Engineer • Loudspeaker • Measurement • Processor • Signal • Sound Reinforcement -
Friday, January 18, 2013Church Sound: Building Your Worship Center For Quality Sound & Acoustics
Vance Breshears 01/18/13 06:37 PM,“Hi, my name is Bob. I’m with “xyz” church and we’re designing a new worship center,” says a voice on the other end of the phone. “The architect told us it’s time to get a sound guy involved, so I’m… View this post
Filed in: Church Sound • Feature • Blog • Study Hall • Business • Installation • Measurement • Processor • Software • Sound Reinforcement -
Thursday, January 17, 2013Accuracy vs. Realism: Simulating The “Human” Side Of Audio Measurement
Pat Brown 01/17/13 10:27 AM,The human auditory system is equipped with two inputs - left and right ears. This “binaural” processing system provides us with the ability to localize where sound is coming from, something that a one-eared listener would have difficulty in doing.… View this post
Filed in: AV • Feature • Poll • Study Hall • Production • Audio • AV • Installation • Measurement • Signal • Sound Reinforcement • System • Technician -
Wednesday, January 16, 2013Protecting Loudspeakers: Using Limiters To Enhance LF While Keeping Things Under Control
Charlie Hughes 01/16/13 09:39 AM,While it’s nothing new to place a limiter immediately in front of a power amplifier to keep it from clipping, there is more that can be accomplished with a limiter to squeeze a bit more low-frequency performance out of a… View this post
Filed in: AV • Feature • Study Hall • Amplifier • AV • Education • Loudspeaker • Processor • Sound Reinforcement -
Thursday, December 13, 2012Speech Intelligibility: Gathering Additional Pieces Of The Audio Puzzle
Pat Brown 12/13/12 07:35 PM,When most people think of sound reinforcement systems, or audio systems in general, they rarely do so with regard to speech intelligibility (SI). It’s usually about the music, with the assumption that if a system sounds good for music, it… View this post
Filed in: AV • Feature • Blog • Study Hall • AV • Education • Measurement • Signal • Sound Reinforcement -
Wednesday, December 05, 2012Loudspeaker Sensitivity: What’s A Watt Anyway?
Charlie Hughes 12/05/12 10:26 AM,The specification of a loudspeaker’s sensitivity is probably one of the most common, yet perhaps one of the most misunderstood. It’s common to see the magnitude response of a loudspeaker system reduced to a single number as a sensitivity rating.… View this post
Filed in: AV • Feature • Study Hall • AV • Loudspeaker • Measurement • Sound Reinforcement -
Wednesday, October 10, 2012Anatomy Of A System Measurement Rig: Probes, Preamps & Processors
Jamie Anderson 10/10/12 04:03 PM,Feed The Brain. The primary job of a measurement rig is to acquire electrical and acoustical signals and feed them to the processor so that it can analyze, compare, slice, dice, fold, spindle and mutilate those signals and produce multi-colored… View this post
Filed in: AV • Feature • Study Hall • AV • Digital • Measurement • Microphone • Signal • Software • Sound Reinforcement • System -
Thursday, September 06, 2012Tuning Without Tools: Working Through A System To Get It Up To Speed
Tim Weaver 09/06/12 06:33 AM,Tuning a sound reinforcement system can be accomplished quickly by using specialized software and a calibrated measurement microphone, combined with the knowledge of how to correctly deploy them and the ability to interpret and understand the data they provide. But… View this post
Filed in: Live Sound • Feature • Blog • Study Hall • Line Array • Loudspeaker • Measurement • Processor • Sound Reinforcement • Subwoofer -
Wednesday, September 05, 2012RT: Reverberation Time = Real Tricky? Comparisons Between Measured & Predicted
Jeff D. Szymanski 09/05/12 12:55 PM,In working with sound and acoustics, here’s something many of us do but may not actually think about enough: Comparisons between measured and predicted reverberation times (RTs). RT (a.k.a., “RT60,” “T60,” “T,” et al) is a widely used quantifier of… View this post
Filed in: AV • Feature • Poll • Study Hall • Training • AV • Measurement • Signal • Software • Sound Reinforcement • Audio -
Tuesday, August 21, 2012Acoustic Fundamentals And The Nature Of Sound
Neil Thompson Shade 08/21/12 03:12 PM,Why should one bother trying to understand basic acoustics? The most simple (and correct) answer is that study of basic concepts enables one to sort through the truth, semi-truth, myths and flat-out errors that pervade the pro audio industry. The… View this post
Filed in: AV • Feature • Study Hall • AV • Education • Measurement • Signal • Sound Reinforcement • System • Audio -
Wednesday, June 13, 2012Proper Loudspeaker Placement: How To Avoid Lobes and Nulls
Pat Brown 06/13/12 09:44 AM,Let’s say the sound system in the house of worship you’re working on goes into feedback whenever microphones pass under the loudspeaker array. Worse yet, there are “soft spots” in some sections of the audience area. Choir mics “squeal” before… View this post
Filed in: AV • Feature • Poll • Study Hall • AV • Digital • Installation • Interconnect • Loudspeaker • Mixer • Signal • Sound Reinforcement • System • Technician • Audio -
Tuesday, May 08, 2012Understanding Sound System, Loudspeaker & Room Interactions
Sam Berkow 05/08/12 05:35 PM,If one could listen to only the direct sound of a loudspeaker, the world would be a very different place! Unfortunately, free field listening, where you have no reflections, room modes or ambient noise, is hard to achieve in everyday… View this post
Filed in: AV • Feature • Poll • Study Hall • AV • Digital • Education • Installation • Loudspeaker • Measurement • Signal • Software • System • Technician • Audio -
Wednesday, May 02, 2012When Eyes And Ears Don’t Agree: Perspective On The Role Of Measurement
Pat Brown 05/02/12 07:02 AM,In my previous article (here), I addressed some of the caveats of measuring sound fields in enclosed spaces. The conclusion was that the eyes and ears do not always agree when it comes to sound quality. If making acoustic measurements… View this post
Filed in: AV • Feature • Study Hall • AV • Measurement • Signal • Sound Reinforcement -
Monday, April 16, 2012Why Measured System Response Doesn’t Match What’s Heard
Pat Brown 04/16/12 01:06 PM,Many audio field technicians are now in possession of measurement systems that can be used to assist the listening process in equalizing sound reinforcement systems. But, they’re often surprised to find that the measured system response correlates poorly with subjective… View this post
Filed in: AV • Feature • Poll • Study Hall • AV • Loudspeaker • Measurement • Microphone • Sound Reinforcement • Audio -
Wednesday, April 11, 2012Predicting Array Performance: Hanging The PA Right The First Time
Bruce Main 04/11/12 05:47 PM,Back in the good old days predicting the performance of a group of loudspeakers was a hit and miss proposition. We tried to hit all the people and miss the walls. We were happy if we had enough devices to… View this post
Filed in: Live Sound • Feature • Poll • Study Hall • Line Array • Loudspeaker • Measurement • Signal • Software • Sound Reinforcement -
Wednesday, June 01, 2011What’s The Measurement? Understanding And Properly Using RTA & FFT
John Murray 06/01/11 07:34 AM, 2 CommentsWhat’s the best way to equalize a sound system - by ear or by measurement? The short answer is both. Each method compliments the other. The ultimate qualification for sound quality is the ear. If it doesn’t sound right, nothing… View this post
Filed in: AV • Feature • Poll • Study Hall • AV • Measurement • Processor • Signal • Software • Sound Reinforcement • Audio
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