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All Measurement Posts

  • Thursday, June 30, 2016
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    Nigel Redmon 06/30/16 12:45 PM,
    This article is provided by EarLevel Engineering.   Here we lay the foundation. We’ll look at analog to digital conversion, and we’ll look at the spectrum of the resulting digital signal. We’ll use that knowledge to help understand the conversion process back to analog. Though we can build real-world converters that work as described, we’re not building practical converters here; we’re interested in the mathematical concepts involved and their relationships to digital signal processing. Analog To Digital Conversion The sampling… View this post
    Filed in: AVFeatureStudy HallAVDigitalDigital Audio WorkstationsEducationMeasurementSoftware

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    Merlijn van Veen 06/30/16 06:13 AM,
    “It turns out that, within very generous tolerances, humans are insensitive to phase shifts. Under carefully contrived circumstances, special signals auditioned in anechoic conditions, or through headphones, people have heard slight differences. However, even these limited results have failed to provide clear evidence of a “preference” for a lack of phase shift. When auditioned in real rooms, these differences disappear…” – Dr. Floyd Toole As Dr. Toole states, a lot of people, including myself, have a hard time detecting phase… View this post
    Filed in: AVFeatureStudy HallAVEducationLoudspeakerMeasurementSound Reinforcement

  • Wednesday, June 29, 2016
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    PSW Staff 06/29/16 06:51 AM,
    Listeners can hear a difference between standard audio and better-than-CD quality, known as high-resolution audio, according to a new study published in the June issue of the Journal of the Audio Engineering Society (JAES) by Dr. Joshua Reiss of the Centre for Digital Music, Queen Mary University of London (QMUL).  The meta-study compared data from 18 studies involving 450 participants listening to samples of music in different formats. In total, the studies involved over 12,000 different trials where participants were… View this post
    Filed in: RecordingNewsDigitalEducationMeasurementStudio

  • Tuesday, June 28, 2016
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    Joe Gilder 06/28/16 06:04 AM,
    This article is provided by Home Studio Corner.   I know it may be hard to believe, but I too used to believe this was true. I had simply never given it much thought. Maybe you’re in the same boat? The issue was, I made the mistake of confusing headroom with dynamic range. Put simply, when I looked at the master fader, if there was a lot of room between the loudest peak of my mix and 0 dBFS (clipping,… View this post
    Filed in: RecordingFeatureProductionAudioDigitalMeasurementMixerMonitoringSignalSoftwareStudioSystem

  • Wednesday, June 22, 2016
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    PSW Staff 06/22/16 06:18 AM,
    Thousands of fans attending the annual Country Music Association (CMA) Music Festival, held in Nashville June 9-12, enjoyed outdoor entertainment at Ascend Amphitheater featuring a significant change in audio approach and production. Morris utilized its new d&b audiotechnik J-Series system along with the NoizCalc solution to achieve as much noise reduction in the far field as possible while maintaining the concert experience fans are accustomed to when attending a show at an amphitheater. “This was the first year Ascend Amphitheater… View this post
    Filed in: Live SoundNewsAVBusinessConcertLine ArrayLoudspeakerMeasurementSound ReinforcementSubwoofer

  • Tuesday, June 21, 2016
    dennis bohn
    Dennis A. Bohn 06/21/16 11:20 AM,
    This article is provided by Rane Corporation.   This paper discusses the pitfalls (often subtle) of our industry’s failure to define and standardize what “unity gain” means, and the conditions necessary to measure it. It further discusses how people improperly use one piece of misinformation (impedance matching) to correct for this lack of standardization. All done, without knowing discrepancies exist between different pieces of equipment, and without knowing impedance matching is unnecessary, signal degrading, and wasteful. For me, it began… View this post
    Filed in: AVFeatureBlogStudy HallAmplifierAVInterconnectMeasurementPowerSignalSound Reinforcement

  • Friday, June 17, 2016
    amplifiers
    Pat Brown 06/17/16 06:26 AM,
      How much power can an audio amplifier produce? As you might expect, “it depends.” I will approach this from two angles—in theory and in practice. This article will deal with the theory. Part 3 will show how things play out in the real world. Importance Of Efficiency Amplifiers don’t make power. They convert it. Any audio power that comes from your amplifier must in turn come from the utility outlet that it is connected to. This is why the… View this post
    Filed in: AVFeatureBlogStudy HallAmplifierAVMeasurementPowerSound Reinforcement

  • Thursday, June 09, 2016
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    Bruce Main 06/09/16 11:34 AM,
    Trap boxes and line arrays get all the attention. And that’s no surprise – they’re big and loud, and dare I say it, glamorous. But the truck rarely rolls without a complement of two-way loudspeakers sporting a 12-inch or 15-inch woofer and a horn. Whether its monitor wedges, drum fill, front fill or just “speakers on sticks,” small 2-way boxes do many of the everyday jobs that make up a typical sound reinforcement day. We take the performance of these… View this post
    Filed in: AVFeatureStudy HallAVEducationEngineerInstallationLoudspeakerMeasurementSound Reinforcement

  • Thursday, June 02, 2016
    prosoundweb
    Jonah Altrove 06/02/16 12:09 PM,
    Every time a new audio innovation arises, it’s met by a certain amount of resistance. This is ironic and puzzling to me, seeing as our field is driven almost entirely by technology. What motivates this response? Perhaps fear that technology will replace us. Are system techs quaking in their boots, fearful of being replaced by a system processor with auto-EQ abilities? How many engineers have become unemployed as a result of automixer technology? More likely, I think it’s fear that… View this post
    Filed in: Live SoundFeatureBlogAnalogBusinessDigitalEngineerMeasurementProcessorSound Reinforcement

  • isemic
    Craig Leerman 06/02/16 04:05 AM,
    As an audio technician, my ears have the final say in how a system is tuned, but with the passing of time, they’re not quite as reliable as they used to be. As a result, I’m increasingly relying on measurement systems to help with dialing in the PA. I also utilize SPL apps on my phone and iPad to help monitor volume levels, and that’s worked out well. So when I first saw the iSEMic 725TR measurement microphone from iSEMcon,… View this post
    Filed in: Live SoundFeatureBlogProductAVMeasurementMicrophoneSignalSound Reinforcement



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