All items tagged with loudspeaker measurements (76)

December 29, 2021 by Geoff Hill

R&D Stories: The Tetrahedral Test Chamber Story (Part 1) - Recognizing the Need for Consistent Measurements

This article revisits the story of the development of the Tetrahedral Test Chamber (TTC), by Geoff Hill, loudspeaker engineer, author, and inventor, in an effort to solve the longstanding problem of making consistent loudspeaker measurements. This innovative loudspeaker test chamber is now defined in international standards and in use throughout the world, scalable to any size of loudspeaker driver. This article was originally published in audioXpress, September 2021.

December 6, 2021 by audioXpress Staff

Klippel Announces dB-Lab Software Updates and New Virtual Lecture 2022 Event

Klippel announced a minor software update for both the R&D and QC software of the Klippel Analyzer System, free of charge for current users of dB-Lab major version 212 or QC 7. The update introduces the new Multi-Tone Measurement (MTON) and Multi-Tone Distortion Task (MTD) measurements, updates to the Near-Field Scanner (NCS) software and new capabilities for the Poly2SCN converter utility, which converts scan data from Polytec systems toto Klippel Software formats. And Klippel announced details of its 2022 Virtual Lecture event.

November 29, 2021 by audioXpress Staff

Outline Announces Globe Source Radiator Acoustic Measurement Solution

Designed in collaboration with the Department of Mechanical And Industrial Engineering at the prestigious Brescia University in Lombardy, and engineered in Italy by Outline, the new Globe Source Radiator (GSR) high-power omnidirectional sound source solution provides a vital tool for acoustic analysis. Complemented with the Outline NG01 noise generator that can be controlled with a radio remote control, and the portable Outline L3000 DSP amplifier, the GSR offers a high-SPL solution for acoustics measurements in all environments, including large venues and spaces.

November 10, 2021 by Claus Futtrup and Jeff Candy

Parameter Estimation and Box Simulation with Speakerbench (Part 1) - Model Parameter Comparisons

The two authors investigate leakage loss as identified with an advanced transducer model and verified with measurements. This is compared to classical Thiele-Small modeling with the intention to motivate the reader to further explore advanced parameter estimation and box simulation with the Speakerbench Speaker Design Calculations online tool. This two-part article concludes with an overview of how Speakerbench offers an accurate and practical approach to this problem. This article was originally published in audioXpress, August 2021.

November 1, 2021 by audioXpress Staff

Outline Announces Revamped ET Series Acoustic Measurement Turntables

A longstanding mainstay of Outline’s diverse portfolio of products, the company's ET System measurement turntables have received important new developments and refinements and are now available in two new models - ET50-3D and ET250R2-3D - to suit different speed and load requirements. Outline’s original concept of a high-precision, computer-controlled turntable capable of placing significant loads with perfect accuracy in a measurement environment is in daily use around the world.

September 13, 2021 by audioXpress Staff

audioXpress October 2021 Home Theater Edition Now Available

The October 2021 edition of audioXpress is now available in print and digital. This edition offers a balanced mix of content, starting with our annual market update report on home theater, and associated residential technologies. Brent Butterworth reviews a MEMS earphone design from USound, Geoff Hill completes his Tetrahedral Test Chamber Story, and Bruce Heran writes about refurbishing Altec Lansing Vintage Speakers. Diving into audio electronics, Morgan Jones writes about Ultra-Linear Design; Morty Tarr discusses Cascodes and Folded Cascodes; and Richard Honeycutt talks about the Effects of Negative Feedback. Jump right in!

September 8, 2021 by Brent Butterworth

CTA-2010: A Better Way to Measure Subwoofers

Exploring the Standard Method of Measurement for Subwoofers (ANSI/CTA-2010-B R-2020), Brent Butterworth discusses how this might be a better method for avoiding the confusion on measuring bass extension of subwoofers. The article details how CTA-2010 measures usable output at 1/3-octave intervals within the subwoofer’s operational range, instead of measuring frequency response at a low sound pressure level. This article was originally published in Voice Coil, June 2021.

August 11, 2021 by audioXpress Staff

audioXpress September 2021 Takes Speaker Building to the Next Level

audioXpress September 2021 celebrates its Speaker Builder magazine origins, once again offering an expanded focus on loudspeaker building, design, and testing. Mike Klasco provides an update on Speaker Technology, Claus Futtrup and Jeff Candy discuss Parameter Estimation and Box Simulation with Speakerbench, and Geoff Hill tells us the Tetrahedral Test Chamber Story. In this edition we pay tribute to Roger Russell (1935-2021) and we feature two great DIY projects. Now available online and in print.

July 23, 2021 by audioXpress Staff

Raising the Bar for Loudspeaker Knowledge in Voice Coil August 2021

It's time for Loudspeaker News and Developments, unique technology Spotlights, valuable industry Directories, great speaker patent reviews, and Vance Dickason's speaker driver characterizations in Test Bench. This month, Bruno Putzeys and Lars Risbo write about their speaker research for Purifi Audio, James Croft reviews an acoustic low-pass filter patent awarded to Bujeon, and Vance Dickason tests the 5CXN44 coaxial driver from B&C Speakers. This edition features updated directories of Voice Coil and Magnet Vendors and Distributors.

July 15, 2021 by audioXpress Staff

Genelec Introduces GLM 4.1 with AutoCal 2 Automatic Room Calibration Algorithm

Genelec is marking the 15th anniversary of its highly praised GLM loudspeaker manager software with the introduction of GLM 4.1, which is compatible with all Genelec Smart Active Monitors and Subwoofers. The GLM 4.1 update offers significant new features and improvements, thanks to the debut of the next-generation AutoCal 2 automatic room calibration algorithm, which delivers a more precise frequency response in a fraction of the time than was previously possible.

R&D Stories: The Tetrahedral Test Chamber Story (Part 1) - Recognizing the Need for Consistent Measurements​

Klippel Announces dB-Lab Software Updates and New Virtual Lecture 2022 Event

Outline Announces Globe Source Radiator Acoustic Measurement Solution

Parameter Estimation and Box Simulation with Speakerbench (Part 1) - Model Parameter Comparisons

Outline Announces Revamped ET Series Acoustic Measurement Turntables

audioXpress October 2021 Home Theater Edition Now Available

CTA-2010: A Better Way to Measure Subwoofers

audioXpress September 2021 Takes Speaker Building to the Next Level

Raising the Bar for Loudspeaker Knowledge in Voice Coil August 2021

Genelec Introduces GLM 4.1 with AutoCal 2 Automatic Room Calibration Algorithm

R&D Stories: The Tetrahedral Test Chamber Story (Part 1) - Recognizing the Need for Consistent Measurements