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Articles Tagged Test And Measurement

  • Tuesday, May 10, 2016
    prosoundweb
    Merlijn van Veen 05/10/16 07:49 AM,
    In this article we’ll investigate how the speed of sound in air is, for all intents and purposes, exclusively temperature dependent within the audible bandwidth of our typical applications. There are some popular misconceptions on this subject related to pressure, density, and other effects that are addressed here. The speed of sound is the distance traveled per second through an elastic medium. The medium is composed of molecules held together by intermolecular forces. Sound energy passes through the medium by… View this story
    Filed in: Live SoundFeatureBlogStudy HallConcertMeasurementSignalSound Reinforcement

  • Thursday, March 31, 2016
    speaker distortion
    Michael MacDonald 03/31/16 05:47 AM,
    Almost everybody in the pro audio business is a specification or “spec” junkie. From folks on the recording side to the sound reinforcement practitioners, we all want every detail of the technical performance of every piece of equipment in a system. Specs seem extremely important, particularly those that represent a numerical improvement from past products, which are heralded as an advantage.  But man cannot live by specs alone. Quite often, those who turn to specifications to answer questions should instead… View this story
    Filed in: AVFeatureOpinionProductProductionAudioAVLine ArrayLoudspeakerSound ReinforcementSubwoofer

  • Wednesday, January 06, 2016
    phase alignment
    Bob McCarthy 01/06/16 06:11 AM,
    The setting of delay times in signal processors is one of the principal techniques of system optimization. In most cases the timing is set to “align” two (or more) signal sources so as to create the most transparent transition between them. The process of selecting that time value can be driven by time or phase, hence the relevant terms are “time alignment” and phase alignment.”  These are related but different concepts and have specific applications. It’s important to know which… View this story
    Filed in: Live SoundFeatureBlogStudy HallLine ArrayLoudspeakerMeasurementProcessorSignalSound ReinforcementSubwoofer

  • Monday, April 20, 2015
    equalization
    Adam Shulman 04/20/15 01:04 PM,
    The term optimization stems from the French word optimisme, meaning “the greatest good” or “the best.” Historically, the sound reinforcement industry has employed the term in the context of sound system tuning or alignment, but it was not until recently that the use of the term optimization has taken on a more literal and formalized meaning. It’s important to be familiar with the concept of numerical optimization (most simply, the determination of input values to obtain a function’s maximum or… View this story
    Filed in: Live SoundFeaturePollMeasurementProcessorSound Reinforcement

  • Thursday, March 05, 2015
    system tuning
    Josh Maichele 03/05/15 01:36 PM,
    I recently traveled to Magnolia Church in Riverside, CA to commission a new house sound reinforcement system designed to support contemporary worship services, and as often happens, it proved an instructive process. The system, installed by CCI Solutions, includes main arrays of L-Acoustics ARCS WiFo (Wide/Focus) loudspeakers flown left, center, and right to provide primary coverage in what is a very wide room. The arrays are supported by a flown ring of delay loudspeakers about three-quarters out in the house.… View this story
    Filed in: AVFeatureBlogStudy HallAVEngineerInstallationLine ArrayLoudspeakerMeasurementMicrophoneSignalSound ReinforcementSystem

  • Monday, March 02, 2015
    live sound international
    Andy Coules 03/02/15 11:43 AM,
    In my experience of teaching live sound, one of the most commonly misunderstood concepts is that of phase. The source of the misunderstanding typically derives from a confusion between the concepts of phase and polarity. So let’s take a look at these two concepts and see how they relate to live sound. The first time most people come across phase is when they’re introduced to the “phase reverse” button (denoted by a circle with a line through it at 45… View this story
    Filed in: AVFeatureBlogStudy HallAVEducationLoudspeakerMeasurementMicrophoneSignalSound Reinforcement

  • Friday, February 27, 2015
    synaudcon
    Kent Margraves 02/27/15 01:11 PM,
    As the name implies, “OptEQ” is an optimized sound system tuning process developed by SynAudCon (Synergetic Audio Concepts), and it was presented to an audience of more than 100 consultants, contractors and end users over the course of two days in early January at the American Airlines Training Center in Ft. Worth. I was fortunate to be one of those attendees. As usual, the workshop was brilliantly prepared, hosted, and presented. Pat and Brenda Brown of SynAudCon are simply the… View this story
    Filed in: AVFeatureBlogStudy HallAVEducationLoudspeakerMeasurementMicrophoneProcessorSignalSoftwareSound Reinforcement

  • Friday, November 21, 2014
    system tuning
    John Murray 11/21/14 03:01 PM,
    You’ve just acquired a 3-D, FFT-based measurement system and are ready to use it to tune a sound system. (Oh, you haven’t? Then click here to learn more.) Now let’s get to it! The first thing to do is place the calibrated measurement microphone on a mic stand in the middle of the listening area, turn on all of the system’s loudspeakers and turn up the test signal, just as is done with a real-time analyzer (RTA). Right? Sorry—wrong! First,… View this story
    Filed in: AVFeatureBlogStudy HallAVLoudspeakerMeasurementMicrophoneSignalSoftwareSound Reinforcement

  • Thursday, November 13, 2014
    audio precision
    PSW Staff 11/13/14 03:25 PM,
    Audio Precision has announced the availability of version 4.0 of its APx500 audio test software, coinciding with shipment of the new APx555 audio analyzer. Version 4.0, available for download by all APx users (here), provides a multi-mode user interface for the entire APx family of analyzers, adding Bench Mode to complement the software’s existing approach of user-selectable automated measurement sequences, now called Sequence Mode. With APx systems used throughout the product development process—from design, debug and validation to final production… View this story
    Filed in: AVLive SoundRecordingNewsAVMeasurementProcessorSignalSoftwareSound ReinforcementStudio

  • Tuesday, October 14, 2014
    lab
    The LAB Community 10/14/14 03:21 PM,
    Enjoy the following thread excerpted from the Live Audio Board (LAB) here on PSW… Topic Posted By Scott I’ve been told that a church in L.A., with 8.000 seating, hit something like 172 dB at the console. Is this possible? Someone else told me there’s no way to exceed 130 dB at the board. So I’m looking for the highest dB level anyone’s seen at the house console. Reply By Tom Danley 172 dB is loud, but is a level… View this story
    Filed in: Live SoundFeatureBlogConcertMeasurementSound Reinforcement



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