All items tagged with loudspeaker measurements (76)

Klippel New dB-Lab Version 212 and QC 7 Updates Extend Speaker and Enclosure Characterization Tools

July 1, 2021 by audioXpress Staff

Klippel New dB-Lab Version 212 and QC 7 Updates Extend Speaker and Enclosure Characterization Tools

Klippel released a major software update to its Klippel Analyzer System. The new dB-Lab Version 212 and QC 7 updates now add shared sensor management, support for the new Multi-Scanning Workbench hardware and three further modules (LSIM, MTON, RMA). The Klippel Multi-Scanning Workbench supports near-field holographic soundfield scanning measurements in a much smaller form factor, while the new modules add linear signal modeling and simulation and multi-tone measurements, dedicated to speaker and enclosure design.

Practical Considerations for Quality Control Testing of Loudspeakers

June 30, 2021 by Dan Knighten

Practical Considerations for Quality Control Testing of Loudspeakers

Integrating a power amplifier, microphone power supply, and analyzer required for speaker tests, the article details how the Audio Precision APx517B can save time in the overall test process through reduced setup and configuration steps. The authors also explain how this new AP solution meets the need to balance the cost of test including time, test methods, and system cost, against "the cost of failure" that might result from the expense of warranty repairs, or the possible negative impact to brand from product returns. This article was originally published in Voice Coil, April 2021.

Achieving Loudspeaker Design Goals Using Multiphysics Simulation

June 11, 2021 by audioXpress Staff

Achieving Loudspeaker Design Goals Using Multiphysics Simulation

Dolby Laboratories and COMSOL join the Audio Product Education Institute in a discussion on the role of modeling and measurements in the loudspeaker design process. The webinar, June 16 (12pm EDT) shares speaker design project experiences, detailing how simulation, measurements, and experiments help in meeting projects' requirements. The use of simulation in audio system design and multiphysics modeling of loudspeakers is addressed.

How to Measure Free-Field Speaker Response Without an Anechoic Chamber

June 7, 2021 by Steve Temme

How to Measure Free-Field Speaker Response Without an Anechoic Chamber

One of the biggest challenges with working from home during the pandemic was not having access to an anechoic chamber. This short tutorial, explains a simple solution for this: a “splice” measurement. The capability for such measurements has been included in SoundCheck since 2001. Despite its long history, this method has not seen widespread use. However, the current pandemic’s working challenges are sparking renewed interest. This article was originally published in Voice Coil, March 2021.

Audio Precision Releases APx500 Version 6.1 Audio Measurement Software

June 1, 2021 by audioXpress Staff

Audio Precision Releases APx500 Version 6.1 Audio Measurement Software

Audio Precision released the APx500 audio measurement software, version 6.1. With this update, AP is adding new measurement results, options, and test signals for production test of loudspeakers, headphone drivers, and microphones. Most importantly for speaker designers and manufacturers the new APx software now offers the broadest set of methodologies available for detecting rub and buzz defects.

New Klippel SCN Near Field Add-On (SCN-NF) Now Available

March 9, 2021 by audioXpress Staff

New Klippel SCN Near Field Add-On (SCN-NF) Now Available

Announced earlier in 2020, Klippel now confirmed availability of its new SCN Near-Field Add On (SCN-NF), a new solution that accurately enables all the most relevant transducer measurements using a single hardware setup in a non-anechoic room. This new powerful addition to the Klippel Scanning Vibrometer is a smart alternative to using an anechoic chamber, and the fastest way to get full directivity holographic measurements, extrapolate SPL to any point in 3D half-space and obtain balloon, contour, polar and sound power plots.

Loudspeaker Knowledge Inside and Out in Voice Coil March 2021

February 26, 2021 by audioXpress Staff

Loudspeaker Knowledge Inside and Out in Voice Coil March 2021

In this edition of Voice Coil, Steve Temme explains "How to Measure Free-Field Speaker Response without an Anechoic Chamber," Mike Klasco writes about "Plastics and Composites for Audio Products in 2021," and there's an updated Speaker Enclosure Vendor Directory. James Croft provides a fascinating patent review of a speaker assembly design for low-frequency control using an acoustic dipole. And Vance Dickason characterizes two new tweeters: the D2404 Ellipticor Tweeter from Scan-Speak, and the Satori AT60NC-4 AMT Tweeter from SB Acoustics. Now available in print and online!

Voice Coil Lab Notes: Phase, Group Delay, and Impulse Response - A Quick Primer

February 24, 2021 by Christopher J. Struck

Voice Coil Lab Notes: Phase, Group Delay, and Impulse Response - A Quick Primer

This short article by Chris Struck (CJS Labs) is mainly focused on the definition and interpretation of phase, helping to make sense of complex data. This reference article is an expanded version of a previous Lab Note published by CJS Labs, and is certainly a great summary of essential knowledge in speaker design. This article was originally published in Voice Coil, December 2020.

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.

Practical Test & Measurement: Fast and Reliable End-of-Line Acoustic Defect Detection

September 23, 2020 by Wolfgang Klippel

Practical Test & Measurement: Fast and Reliable End-of-Line Acoustic Defect Detection

This article discusses end-of-line testing, a crucial step in production, which requires very specific procedures and measurements. Specifically, the authors focus on testing irregular acoustic defects (also known as Rub & Buzz) to reduce the test time and optimal solutions to speed automatic testing in a production environment. This article was originally published in audioXpress, September 2020.

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