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Tuesday, May 15, 2012
Pat Brown 05/15/12 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. Playback systems may utilize any number of channels to surround the listener with sound, but two channels is always enough to simulate the human listener. Recording enthusiasts have long discovered the benefits of stereo microphones. While not necessarily “human-like,” they… View this story
Filed in: AV • Feature • Poll • Study Hall • AV • Audio • Installation • Measurement • Signal • Sound Reinforcement • System • Technician -
Tuesday, May 08, 2012
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 life, so we listen to loudspeakers in real rooms. The interaction of a loudspeaker system and a room can be very complex to understand, model or measure! One way to measure this interaction is to measure the impulse response of… View this story
Filed in: AV • Feature • Poll • Study Hall • AV • Audio • Digital • Education • Installation • Loudspeaker • Measurement • Signal • Software • System • Technician -
Wednesday, May 02, 2012
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 is so difficult, why bother? Why not tune the system based solely on listening? Because there are several very good reasons for including our eyes in the system tuning process! We humans base our concept of reality upon the evidence… View this story
Filed in: AV • Feature • Study Hall • AV • Measurement • Signal • Sound Reinforcement -
Monday, April 16, 2012
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 impression of how the system sounds. In other words, the system can sound good when it looks bad on the analyzer, and it can sound bad when it looks good on the analyzer. As a result, some users have become… View this story
Filed in: AV • Feature • Poll • Study Hall • AV • Audio • Loudspeaker • Measurement • Microphone • Sound Reinforcement -
Wednesday, April 11, 2012
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 point a transducer everywhere that needed coverage and enough power to make it good and loud. Complex interactions between devices operating in the same bandwidth, fine level adjustments for individual devices and precise flying angles were the least of our… View this story
Filed in: Live Sound • Feature • Poll • Study Hall • Line Array • Loudspeaker • Measurement • Signal • Software • Sound Reinforcement -
Wednesday, January 25, 2012
Charlie Hughes 01/25/12 03:06 PM,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. This is perhaps at the heart of the confusion. One would think that this metric should give some indication as to how loud a particular loudspeaker will be when reproducing a signal. One may also think that two loudspeakers with… View this story
Filed in: AV • Feature • Poll • Study Hall • AV • Loudspeaker • Measurement • Sound Reinforcement -
Thursday, June 09, 2011
Bennett Prescott 06/09/11 09:51 AM, 0 CommentsIn my perhaps too frequent visits to the Live Audio Board, I regularly read about weekend warriors who have just acquired their first DSP (digital signal processor) system controller and are seeking to understand how it’s auto RTA (real-time analyzer) function can help provide better performance out of their portable sound system. Invariably, the DSP unit is pressed into service for the first gig, a measurement microphone is attached, and some signal (usually pink noise) is run through the rig… View this story
Filed in: Live Sound • Feature • Poll • Study Hall • Digital • Loudspeaker • Measurement • Processor • Software • Sound Reinforcement • System -
Wednesday, June 01, 2011
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 else matters. I once spent two-plus hours tuning a church sound system using the same methods I’ve employed on more than 100 systems, and the resulting sound was terrible. Rather than trying to convince my ears that the very good… View this story
Filed in: AV • Feature • Poll • Study Hall • AV • Audio • Measurement • Processor • Signal • Software • Sound Reinforcement -
Thursday, March 31, 2011
Vance Breshears 03/31/11 01:06 PM, 2 Comments“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 calling you.” “Oh no,” I think, “this is the first sign of trouble.” After talking with him to get initial information about the scope of the project, we get to the heart of the problem: “Most of the building design… View this story
Filed in: Church Sound • Feature • Poll • Study Hall • AV • Audio • Installation • Measurement • Processor • Software • Sound Reinforcement -
Thursday, March 17, 2011
Jeff D. Szymanski 03/17/11 11:34 AM, 0 CommentsIn 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 the acoustical behavior of a room. Sound decays in a room. (Albeit, less quickly in some rooms than in others, as we’re all painfully aware.) RT is defined as how long it takes sound in a room to decay by… View this story
Filed in: AV • Feature • Poll • Study Hall • Training • AV • Audio • Measurement • Signal • Software • Sound Reinforcement
Articles Tagged Acoustic Measurement
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