All items tagged with test and measurement (386)

Just One More Thing. Don't Miss Voice Coil December 2023

November 29, 2023 by audioXpress Staff

Just One More Thing. Don't Miss Voice Coil December 2023

This is the last issue of Voice Coil for 2023, which includes a combination of valuable industry resources and expert knowledge for loudspeaker engineers. Mike Klasco and Nora Wong (Menlo Scientific) have compiled an updated directory of Engineering Simulation Software and Test & Measurement Hardware Vendors. And in Test Bench, Vance Dickason characterizes the latest PTT8.0X04-NAB-02 8" aluminum cone woofer from Purifi Audio.

Redrock Acoustics Relaunches Loudspeaker Testing Services

November 20, 2023 by audioXpress Staff

Redrock Acoustics Relaunches Loudspeaker Testing Services

Redrock Acoustics, the company founded by Patrick Turnmire, announced the launch of a new website that also signals the return of the company to offering loudspeaker testing services. Renowned for offering engineering and design services, Redrock Acoustics is again opening access to services that include Klippel testing and transducer analysis. Visitors to the new website will find information about all services, and the SpeaD transducer development software, as well as other design tools.

Audio Precision Expands Electronic Audio Testing with New APx516B Audio Analyzer

November 15, 2023 by Joao Martins

Audio Precision Expands Electronic Audio Testing with New APx516B Audio Analyzer

Audio Precision announced the new APx516B, a modular and affordable audio analyzer that expands electronic audio testing with even better performance and flexibility. The new Audio Precision APx516B Audio Analyzer is a budget-friendly solution to test both analog and digital audio with two analog generator/analyzer channels with performance suitable for testing consumer and professional audio devices, a digital interface module slot, and seamless integration with APx500 measurement software.

Everything That's Audio in audioXpress December 2023

November 14, 2023 by audioXpress Staff

Everything That's Audio in audioXpress December 2023

audioXpress December 2023 includes a market overview of multiroom audio, Brent Butterworth writes about new ways to measure ANC earbuds, and Stuart Yaniger measured the new Axign and GaN Systems Class-D audio amplifier board. Richard Honeycutt writes about tubes, BJTs, JFETs, MOSFETs, and ICs, and Dimitri Danyuk, discusses JFETs in audio circuits. Douglas Self explains how to optimize variable-frequency tone controls, and Jan Didden shares his eDD direct-drive amplifier project.

Measuring Loudspeaker SPL Response and Harmonic Distortion at Low Frequencies

November 8, 2023 by Reinhold Lutz

Measuring Loudspeaker SPL Response and Harmonic Distortion at Low Frequencies

This article discusses how to measure loudspeaker SPL response and harmonic distortion at low frequencies in a standard environment, full of reflections from acoustically hard boundaries (e.g., walls, floor, and ceiling), room resonances, and even ambient noise reducing the dynamic range and accuracy of the measurements. The method combines near-field measurements with two identical microphones. This article was originally published in audioXpress, October 2023.

Klippel Releases dB-Lab Version 212 and QC 7 Update

October 27, 2023 by Joao Martins

Klippel Releases dB-Lab Version 212 and QC 7 Update

Klippel released the dB-Lab 212.616 and QC 7.5 maintenance update for the Klippel Analyzer System. The October 2023 software release is now available and features significant revisions to the Klippel Endurance Test (KET) as well as extended analysis opportunities for R&D modules like Multi-Tone Measurement (MTON) and Time Frequency Analysis (TFA). The update is free of charge for all users running dB-Lab 212 or QC7.

AES Publishes AES75-2023 AES Standard for Acoustics Update

October 18, 2023 by Audio Engineering_Society

AES Publishes AES75-2023 AES Standard for Acoustics Update

The Audio Engineering Society Standards Committee has published an updated to the recently approved standard, AES75-2023: "AES standard for acoustics – Measuring loudspeaker maximum linear sound levels using noise." The standard, originally announced and adopted in March 2022, addresses the need for a practical and repeatable procedure for quantifying this key aspect of loudspeaker performance. The update reflects industry support from audio manufacturers, audio test and measurement manufacturers, and service providers.

October 17, 2023 by Joao Martins

GRAS Releases New Production Line Measurement Microphone with EQset Technology

GRAS Sound & Vibration, announced the new GRAS EQ 40PM-1 microphone. This new miniature microphone joins the already successful family of GRAS measurement microphones with EQset technology, lowering the cost of precision in production line acoustic measurements. GRAS EQset technology essentially guarantees fixed sensitivity and a flat response curve across all frequencies, out of the box, vastly reducing the risk of measurement errors. The GRAS EQ 40PM-1 with EQset is an upgraded version of the EQ 40PM, the first in the EQset line.

Echo Test + Measurement Announces Enhanced Support for National Instrument's LabVIEW Software

September 20, 2023 by audioXpress Staff

Echo Test + Measurement Announces Enhanced Support for National Instrument's LabVIEW Software

Echo Test + Measurement, the manufacturer of the AIO Test System family of modular, soundcard based, audio test hardware, announced enhanced support for National Instrument's LabVIEW software. LabVIEW is a graphical programming environment engineers use to develop automated research, validation, and production test systems. The Enhanced LabVIEW Virtual Instruments is now available, supporting 64-bit LabVIEW 2023.

COMSOL and Klippel, Integration of Simulation and Measurement Data

August 4, 2023 by Roger Shively

COMSOL and Klippel, Integration of Simulation and Measurement Data

Modeling and Simulation and Measurement systems evolved significantly in the past decade. Important progress is now bridging the gap between COMSOL simulation and Klippel measurement data, Roger Shively reports after returning from Orlando, FL, where we attended another edition of the ALTI Expo & Conference (June 11-13, 2023). This article summarizes the content covered in a very important session as part of the APDA-ALTI Education Symposium 2023.

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