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A/V features

  • Wednesday, June 25, 2014
    Daniel L. Newman 06/25 06:32 PM,
    This article is provided by Commercial Integrator   In the interest of full disclosure, I am not an A/V geek. I have only spent my entire career in or on the periphery of the A/V industry. I mean, A/V geeks push the cart around the school. They wear bifocals with tape around the nose and they are very susceptible to bullies’ wedgies. However, over the years I have gotten to know a lot about A/V. This tiny industry is chock… View this story
    Filed in: AVFeatureBlogStudy HallAnalogAVBusinessDigitalEngineerEthernetInterconnectNetworkingTechnician

  • amplifiers
    Pat Brown 06/25 01:07 PM,
      The crest factor of an audio signal is the dB difference between the peaks and the RMS value of the signal. The RMS (Root Mean Square) is defined as the “heating value” of the signal - the voltage that would generate the same heat as a DC (Direct Current) signal, over the same time. The RMS value of a complex signal must be read with an RMS voltmeter. Alternatively, the signal can be digitally sampled and the samples summed… View this story
    Filed in: AVFeatureBlogStudy HallAmplifierAVInterconnectLoudspeakerPowerSignalSystem

  • Tuesday, June 24, 2014
    db reference chart
    Pat Brown 06/24 06:32 AM,
      Increasingly, SynAudCon has been doing audio training for industries outside of mainstream audio. These include fire alarm, security and IT. Practitioners in these fields are being dragged “kicking and screaming” into the professional audio world. The concept most difficult for them to grasp is the decibel. Our task is to convey a working understanding of the dB in the shortest possible time span. In a one or two-day class, there is simply no time for an in-depth discussion of… View this story
    Filed in: AVFeatureBlogStudy HallAVMeasurementSignalSound ReinforcementSystem

  • Tuesday, June 17, 2014
    John Eargle & Chris Foreman 06/17 08:49 AM,
    Compression drivers and the horns that comprise the horn loudspeaker system have been a part of the audio industry from the very beginning of product development in sound reinforcement systems. As is true for cone loudspeakers, most of the early development in horn loudspeakers began when sound was first put to picture back in the 1930s when the first “talking films” were released.  Since that time, compression driver technology coupled with horn development advances have been in the areas of… View this story
    Filed in: AVFeatureStudy HallAVLoudspeakerSound Reinforcement

  • Monday, June 16, 2014
    Pat Brown 06/16 07:09 PM,
      An auditorium is a “place for hearing.” It’s very definition suggests that any aspect of the space that has to do with communication should be given high priority. Prior to the invention of the sound reinforcement system, an auditorium was a space designed to allow a large number of people to be addressed by an unreinforced talker. The room geometry and acoustical treatments in an auditorium provided natural reinforcement for the acoustic source. The ancient Greeks even built megaphones… View this story
    Filed in: AVFeatureBlogStudy HallAVLine ArrayLoudspeakerSound ReinforcementSubwoofer

  • Friday, June 13, 2014
    Ken DeLoria 06/13 01:01 PM,
    As sound reproduction has transitioned to the digital realm, audio professionals have a wealth of capabilities that were unthinkable in the analog days. Today, loudspeakers with companion digital processors are increasingly a tool of choice, going well beyond just the higher end of the application spectrum. Virtually all types and brands of digital loudspeaker processors offer a rich suite of features, often overwhelmingly so. Some have capabilities that are unique, while others seek to capture the most important functions at… View this story
    Filed in: AVFeatureBlogStudy HallAVLoudspeakerMeasurementProcessorSound Reinforcement

  • Wednesday, June 11, 2014
    power techniques
    Bill Whitlock 06/11 12:05 PM,
    When a system contains two or more pieces of equipment that are grounded, whether via power cords or other ground connections, a “ground loop” will likely be formed. (See Figure 1, below.) Although ground loops often involve power line safety ground connections, disabling them is both highly dangerous and illegal. However, devices called “ground isolators” can be inserted in the signal path to break the loop safely. This approach attacks the problem at its fundamental roots, while tampering with safety… View this story
    Filed in: AVFeatureBlogStudy HallAVInterconnectPowerSignalSystem

  • Monday, June 09, 2014
    Bruce Jackson & Steve Harvey 06/09 12:50 PM,
    Analog? Digital? Both? In professional audio, many choices exist, but there’s not enough time to make the wrong ones. We regularly hear claims floating about, often skewed by particular opinions and interests that tend to color underlying simple truths. The Merriam-Webster Dictionary defines the noun “analog” as being something that is analogous (similar or related) to something else. For example, an analog can be a food product that represents another, such as inexpensive whitefish “krab” intended to replicate more expensive… View this story
    Filed in: AVRecordingFeatureBlogStudy HallAnalogAVConsolesDigitalProcessorSignalSound ReinforcementStudio

  • ci
    Steve Greenblatt 06/09 12:48 PM,
    This article is provided by Commercial Integrator   The neverending plight of the control system programmer is to program a system with nothing more than a set of drawings and a best guess at what the system should do. Why is this such a common occurrence? Because of the problematic approach of designing the system first, then worrying about what it should do later! The first question any programmer asks when approaching a project that is already designed is, “How… View this story
    Filed in: AVFeatureStudy HallAVBusinessInstallationInterconnectNetworkingSoftwareSystem

  • Wednesday, June 04, 2014
    Pat Brown 06/04 01:01 PM,
      It is generally accepted that a large loudspeaker power rating is a sign of quality and something to be desired. It may be the performance metric that has the greatest influence on the consumer’s buying decision. A closer look reveals that it is far less significant than other metrics regarding the performance of the loudspeaker. The Basics The power rating of an amplifier describes its ability to do work on a load – like moving a loudspeaker. Generally, the… View this story
    Filed in: AVFeatureBlogStudy HallAmplifierAVLine ArrayLoudspeakerMeasurementPowerSignal