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Friday, March 08, 2013
Bob Thurmond 03/08/13 02:26 PM,There exists a long list of important sound system characteristics that we have no meaningful way to measure or evaluate. Besides, the really important skill is to be able to listen, identify problems by ear and correct them on the spot, right? But is this realistic or just an elusive dream? Even if problems can be identified subjectively, they still need to be solved physically. Therefore, we must know exactly what, where and how much. These parameters can be learned… View this story
Filed in: Live Sound • Feature • Blog • Study Hall • Loudspeaker • Measurement • Processor • Signal • Software • Sound Reinforcement • System -
Wednesday, March 06, 2013
Ken DeLoria 03/06/13 10:57 AM,Last time out (here), we looked at early forms of audio measurement equipment, including chart recorders, heterodyne analyzers, and real-time analyzers (RTAs). Now let’s pick it up with fast Fourier transform analyzers (FFTs), which are still in widespread use the world over in a variety of forms. In addition to accurately characterizing audio signals, FFTs are used for vibration analysis, order analysis of rotating machinery, RF and microwave measurements, and many other purposes. One could say they’re the gold standard… View this story
Filed in: AV • Feature • Blog • Study Hall • AV • Measurement • Signal • Sound Reinforcement -
Thursday, February 14, 2013
PSW Staff 02/14/13 06:45 PM,L-Acoustics has announced that new modules are now available for third party software, including CATT-Acoustics (Dynamic Link Library - DLL), EASE (Generic Loudspeaker Library - GLL), ODEON and LARA. Sound designers and acousticians can now simulate L-Acoustics’ line source arrays via specific GLL or DLL files for the electro-acoustic software EASE and CATT-Acoustics, respectively. L-Acoustics coaxial speakers can also be simulated using the dedicated GLL file in EASE and the Common Loudspeaker Format (CLF) file for CATT-Acoustics, ODEON and LARA.… View this story
Filed in: AV • Live Sound • Church Sound • News • Product • Production • Audio • AV • Line Array • Loudspeaker • Measurement • Software -
Friday, February 01, 2013
Michael MacDonald 02/01/13 12:24 PM,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: AV • Feature • Opinion • Product • Production • Audio • AV • Line Array • Loudspeaker • Sound Reinforcement • Subwoofer -
PSW Staff 02/01/13 09:55 AM,Engineer Jimmy Nicholson of These Go To Eleven Ltd. recently deployed his newly acquired Kaltman Creations Invisible Waves X RF Command for the recent North American tour by Peter Gabriel that saw him performing his 1986 album “So” in its entirety, with the band members that made up the original tour 25 years ago. Nicholson was responsible 32 wireless microphone and IEM systems, and due to the nature of the stage set and lighting truss layout, had a very limited… View this story
Filed in: AV • Live Sound • Production • News • Production • Audio • AV • Manufacturer • Signal • Sound Reinforcement • Wireless -
Thursday, January 31, 2013
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 decades. Way, way back in time, graphical acoustic measurements were acquired by means of chart recorders. A chart recorder looks a lot like the lie detector seen in old-time movies and is analogous to a mechanical version of a CRT… View this story
Filed in: AV • Feature • Blog • Study Hall • Production • Audio • AV • Engineer • Loudspeaker • Measurement • Processor • Signal • Sound Reinforcement -
Tuesday, December 18, 2012
Ken DeLoria 12/18/12 07:31 AM,In the previous segment, we looked at the basic process of using a high-resolution FFT (Fast Fourier Transform) analyzer to view the frequency and phase response of a 12-inch cone driver in a typical 12-inch/2-way loudspeaker. In that segment, we established that the 30-degree off-axis response of the cone driver is substantially lower in level (12 to 18 dB), as well as highly irregular in phase and frequency above approximately 2 kHz, when compared to the driver’s on-axis response (Figure… View this story
Filed in: Live Sound • Feature • Study Hall • Loudspeaker • Measurement • Processor • Signal • Sound Reinforcement -
Wednesday, November 21, 2012
Ken DeLoria 11/21/12 09:04 AM,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: Live Sound • Feature • Poll • Digital • Loudspeaker • Measurement • Processor • Signal • Sound Reinforcement -
Thursday, November 01, 2012
Pat Brown 11/01/12 05:42 PM,Human listeners are effective “comparators.” We are very sensitive to changes in what we hear. When comparing loudspeakers, we are most sensitive to differences between models or brands rather than similarities. This powerful analytical tool can be emulated in the world of test and measurement. I have long considered the “difference” measurement to be one of the most valuable tools available to the sound practitioner. The procedure involves: 1. Performing a measurement 2. Storing it as a reference 3. Introduce… View this story
Filed in: AV • Feature • Blog • Study Hall • AV • Loudspeaker • Measurement • Signal -
Tuesday, July 03, 2012
Tom Lubin & "Dr. Don" Pearson 07/03/12 02:26 PM,When the earliest recordings were done there was little if any attention given to the acoustic phase or electrical polarity of the mechanical devices used to record and reproduce sound. Phase and polarity have little significance as long as only one microphone picks up the sound and one loudspeaker plays. When recording left the experimental stage it became possible to mix together more than one microphone. This allowed for better control and balance among the instruments. With advancements in technology,… View this story
Filed in: AV • Feature • Poll • Study Hall • AV • Loudspeaker • Measurement • Microphone • Signal • Sound Reinforcement
Articles Tagged Test And Measurement
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