All items tagged with test and measurement (414)
audioXpress March 2017, Focus on Test and Measurement, Now Available!
February 13, 2017 by audioXpress Staff

audioXpress March 2017, Focus on Test and Measurement, Now Available!

A long-standing tradition, audioXpress' Focus on Test and Measurement 2017 is now available. Start with a thorough review of Audio Precision’s new APx1701 Transducer Interface; explore the DIM-100 device for interfacing and measuring with sound cards; build an Audio Dummy Load; learn how to measure Harmonic Distortion and discover the effects of Community Noise and their measurements. And just how good TIDAL's streaming quality actually is? All that and more in audioXpress March 2017. Get your copy now.
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Smartphone Apps for Sound Measurement
February 4, 2017 by Richard Honeycutt

Smartphone Apps for Sound Measurement

In audioXpress' November 2015 Sound Control column, Richard Honeycutt, addressed the topic of Smartphone Apps for Sound Measurement. Touching on the challenges and benefits of the smartphone approach as a mobile test and measurement device, as well as reviewing available apps for iOS (Apple), Android, and Microsoft Windows, this an article that needs to be broadly shared while it is still up to date. Read the full article now available online.
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Tektronix Announces Automated USB 3.1 Type-C Test Solution
December 7, 2016 by audioXpress Staff

Tektronix Announces Automated USB 3.1 Type-C Test Solution

Tektronix announced an automated USB 3.1 Type-C transmitter test solution for Gen1 and Gen 2 that combines full SigTest support with DPOJET debug and analysis tools, allowing designers to bring devices with improved margins to market in less time. The new solution delivers 100 percent compliance test coverage as well as full support for the new Type-C connector, fixtures and associated channel tests.
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HEAD acoustics Launches VoCAS Speech Recognition Evaluation Software
December 1, 2016 by audioXpress Staff

HEAD acoustics Launches VoCAS Speech Recognition Evaluation Software

German company HEAD acoustics launched VoCAS (Voice Control Analysis System), an efficient software analysis solution for evaluating speech recognition systems. From voice control in vehicles to the use of speech commands for smartphones, tablets or telephone hotlines, VoCAS allows quick and objective quality evaluation, under realistic and repeatable test conditions, of Automatic Speech Recognition (ASR) systems, found in an increasing number of applications today.
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Target SPL and Required Amplifier Size
November 16, 2016 by Charlie Hughes

Target SPL and Required Amplifier Size

In a previous article (Loudspeaker Sensitivity: What’s a Watt Anyway? April 2010 Voice Coil), I examined the topic of loudspeaker sensitivity and how it may or may not relate to the overall sound pressure level (SPL) produced by a loudspeaker. The output capability of the amplifier driving the loudspeaker is of equal importance to achieving the target SPL from the direct field of a loudspeaker. This can also be related to the driving signal or the intended program material. This article was originally published in Voice Coil, May 2010.
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Testing Loudspeakers: Which Measurements Matter, Part 2
November 16, 2016 by Joe D'Appolito

Testing Loudspeakers: Which Measurements Matter, Part 2

In this reference article, published by audioXpress in 2008, Joe D’Appolito shares his experiments with loudspeaker evaluation. In the two parts of this article, D’Appolito tries to answer the question: “Of all the measurements available to the designer, which ones are the best predictors of listener preference?" In over 30 years of designing loudspeakers, I have found the following measurements taken as a group provide the strongest predictor of loudspeaker preference available to us today,” he states.
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Testing Loudspeakers: Which Measurements Matter, Part 1
November 10, 2016 by Joe D'Appolito

Testing Loudspeakers: Which Measurements Matter, Part 1

The controversy over subjective versus objective loudspeaker evaluation has raged on for decades. However, to my mind, there is no controversy. These criteria are simply two faces of the same coin. In over 30 years of designing loudspeakers, I have found the following measurements taken as a group provide the strongest predictor of loudspeaker preference available to us today. Want to know more? Read this reference article, originally published in audioXpress, September 2008.
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NI Announces High-Speed, High-Resolution, High-Voltage PXI Oscilloscope with User-Programmable FPGA
October 31, 2016 by Cristina Costa

NI Announces High-Speed, High-Resolution, High-Voltage PXI Oscilloscope with User-Programmable FPGA

National Instruments (NI) announced the PXIe-5164 oscilloscope, which delivers 100 Vpp maximum input range at 1 GS/s and 14 bits. The PXIe-5164 features 400 MHz of bandwidth, 250 volts of measurement range and is built on the open, modular PXI architecture, and includes a user-programmable FPGA to help aerospace/defense, semiconductor and research/physics applications that require high-voltage measurements and high levels of amplitude accuracy.
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Listen Releases SoundCheck Version 15 and is Awarded Patent for SC Amp Amplifier
October 4, 2016 by audioXpress Staff

Listen Releases SoundCheck Version 15 and is Awarded Patent for SC Amp Amplifier

Listen, Inc., announced the release of SoundCheck Version 15. This release for Mac and Windows expands the testing capability of SoundCheck with additional external control, calibration, audio mixing and hardware integration, and introduces the first in the company’s redesigned virtual instruments, the multimeter. Meanwhile, the Boston-based company was awarded a patent for its audio test amplifier, SC Amp.
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Audio Precision Introduces AGC, Octave Analysis and Audio-Video Sync Measurement Plugins
August 31, 2016 by audioXpress Staff

Audio Precision Introduces AGC, Octave Analysis and Audio-Video Sync Measurement Plugins

Audio Precision introduced a trio of new measurement plugins for their intuitive and versatile APx audio test software, now offering attack-and-release, fractional octave analysis and audio-video sync measurements. Each plugin integrates directly with APx software (version 4.3 or later) and adds new capabilities while allowing users to take advantage of built-in APx features such as limits, sequencer control, derived results and reporting.
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