All items tagged with audio measurements (138)
Searching for a Unicorn Part 2: Generating a Good Signal Source
January 27, 2021 by Brian Lowe

Searching for a Unicorn Part 2: Generating a Good Signal Source

In this second article, Brian Lowe (Belleson LLC) continues his search for the Unicorn of "Measuring Voltage Regulator Ripple Rejection," this time focusing on the test fixtures. Testing a voltage regulator with exceptionally good performance requires an even more exceptional signal source and measurement setup to measure sub-microVolt ripple across a wide frequency range. Complementing the final article, Jan Didden, offers an informative sidebar about super regulators. This article was originally published in audioXpress, June 2019.
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Searching for a Unicorn Part 1: Measuring Voltage Regulator Ripple Rejection
January 20, 2021 by Brian Lowe

Searching for a Unicorn Part 1: Measuring Voltage Regulator Ripple Rejection

In this article Brian Lowe shares a fascinating journey in his search for a "Unicorn" that is measuring voltage regulator ripple rejection - or power supply rejection ratio (PSRR). Lowe is the founder and principle engineer at Belleson, LLC, and he has devoted a lot of time to this fascinating "quest." This article was originally published in audioXpress, May 2019.
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Fresh From the Bench: QuantAsylum QA401 and QA451 Compact and Modular Audio Measurement System
January 7, 2021 by David Logvin

Fresh From the Bench: QuantAsylum QA401 and QA451 Compact and Modular Audio Measurement System

On the cover of audioXpress December 2020, many of our readers instantly recognized the familiar look of the increasingly popular QuantAsylum QA401 audio analyzer. What many readers didn't recognize by then was the second module, the completely new QA451 programmable load, so new that audioXpress tested a pre-production version. In this review article, David Logvin shares his valuable perspective on this modular solution for audio measurements from QuantAsylum.
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Practical Test & Measurement: Mastering Wireless Multi-Tone Testing
December 29, 2020 by Andrew Taylor

Practical Test & Measurement: Mastering Wireless Multi-Tone Testing

This article explains the issues resulting from measuring a wireless audio connection and how wireless multi-tone testing can help us to overcome those obstacles. The article is particularly focused on the needs of manufacturers and designers of modern wireless audio devices and offers valuable insights on multi-tone testing, a technique that has been around for many years, and which Klippel perfected in its own multi-tone measurement module (MTON). This article was originally published in audioXpress, December 2020.
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Practical Test & Measurement: What to Measure for Quality Control of Audio Devices
December 3, 2020 by Dan Knighten

Practical Test & Measurement: What to Measure for Quality Control of Audio Devices

In this Test & Measurement article from Dan Knighten (Audio Precision), the author focuses on the practical question of manufacturing test strategies and objectives and shares what measurements reveal about the device under test, offers suggestions for specific measurements, and provides techniques for various devices and scenarios. This article was originally published in audioXpress, November 2020.
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Audio Precision Announces New APx517B Acoustic Analyzer Fulfilling the Requirements of Production Test
November 19, 2020 by audioXpress Staff

Audio Precision Announces New APx517B Acoustic Analyzer Fulfilling the Requirements of Production Test

Audio Precision announced the APx517B acoustic analyzer, specifically designed, configured and built for the production-line testing of speakers, microphones, headphones, headsets and the wide range of consumer electronics incorporating speakers and microphones. With the introduction of the APx517B acoustic analyzer, manufacturers can deploy an integrated acoustic test system that brings the renowned quality, reliability and robustness of Audio Precision’s lab-oriented analyzers to their production lines.
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Klippel Analyzer System Receives Software Updates for Testing DSP-Based Audio Devices
November 17, 2020 by Joao Martins

Klippel Analyzer System Receives Software Updates for Testing DSP-Based Audio Devices

Klippel has been keeping busy in the last months, continuously improving their measurement technology for loudspeakers and audio systems. With the dB-Lab 210.918 and QC 6.7 software updates, Klippel introduced new tools for testing DSP-enhanced speakers, headphones and connected audio systems, first with and hardware add-on for the SCN Scanning Vibrometer, and second with an extension for automatic testing at multiple excitation levels using the TRF module.
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HEAD acoustics Promotes Days of Acoustics 2020 Online Seminars
November 4, 2020 by audioXpress Staff

HEAD acoustics Promotes Days of Acoustics 2020 Online Seminars

Record. Analyze. Understand. In 2020, you are all sitting in the front row! This is the inspirational appeal for this year's HEAD acoustics "Day of Acoustics" roadshow, a series of free online seminars with dedicated focus topics, taking place from October 29 to December 03, 2020. The online sessions are offered by HEAD acoustics experts in integrated acoustics solutions, sound and vibration analysis, and audio measurement, in areas such as telecommunications, automotive, and speech and audio quality optimization.
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Brüel & Kjær Launches a New Pressure-Field Measurement Microphone and Cartridge
September 14, 2020 by audioXpress Staff

Brüel & Kjær Launches a New Pressure-Field Measurement Microphone and Cartridge

To help engineers and acousticians achieve accurate measurements in everyday tasks, Bruel & Kjaer has created a robust and reliable 1/2-inch CCLD pressure-field microphone - Type 4971-H-041. This new microphone was designed for measuring close to hard reflective surfaces, close to sound ports of audio devices or in flush mountings. The new Bruel microphone is also suitable for random-incidence measurements and free-field measurements with 90° incidence.
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L-Acoustics Releases M1 Suite of Measurement and Monitoring Tools
July 24, 2020 by audioXpress Staff

L-Acoustics Releases M1 Suite of Measurement and Monitoring Tools

In tandem with the recent release of LA Network Manager 3, L-Acoustics announced it is taking its sound reinforcement system control and monitoring software to a new level with the introduction of the M1 suite, a comprehensive set of measurement and monitoring tools. From data acquisition through system tuning to live monitoring, M1 harnesses the power of the manufacturer’s P1 processor and amplified controller hardware to deliver a streamlined system calibration process as well as real-time performance monitoring.
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