All items tagged with René Christensen (20)

Capture Adaptive Audio Intelligence in audioXpress February 2024

January 9, 2024 by audioXpress Staff

Capture Adaptive Audio Intelligence in audioXpress February 2024

In the February 2024 issue of audioXpress read the latest on AI, Adaptive Audio Enhancement, and Noise Cancellation, Microphones, and Voice Capture. René Christensen writes about Acoustical Shape Optimization, and Richard Honeycutt writes about Sustainable Acoustical Products. David Ralph writes about Duelund vs. Linkwitz-Riley crossovers, and Paul Kittinger explains how to build the Duetta Transmission-Line speakers. Chris Paul writes about A Better Beta Follower amplifier, while Richard Honeycutt puts together an Imaginary Silvertec Guitar Amplifier.

audioXpress.com - The Most Popular Stories of 2023

December 29, 2023 by audioXpress Staff

audioXpress.com - The Most Popular Stories of 2023

We looked at the popular articles of 2023 in audioXpress.com (including selected articles from audioXpress and Voice Coil magazines), and we created this Top 11 list of news stories and online articles. As the number of visitors and pageviews registered by audioXpress.com continues to break records every year, visitors from all over the world returned more often to read the many stories available. Which of the topics and stories published online in 2023 were the most popular? Here are the results!

Simulation Techniques: Loudspeaker Driver Displacement Decomposition

October 25, 2023 by René Christensen

Simulation Techniques: Loudspeaker Driver Displacement Decomposition

This article by René Christensen (BSEE, MSc, PhD), offers a valuable tutorial that discusses the unique possibilities of three-dimensional analysis of loudspeaker driver displacement, using Phase Decomposition and Axial-Symmetrical Decomposition techniques. The article demonstrates how a total displacement on a cone surface can be decomposed into different components directly in COMSOL Multiphysics, and how this can reveal some of the underlying mechanisms of the driver.

Simulation Techniques: Misconceptions in the Audio Industry

September 20, 2023 by René Christensen

Simulation Techniques: Misconceptions in the Audio Industry

In this fascinating article about common sound theory misconceptions that exist in the audio and hifi communities, René Christensen debunks three of them. Starting with group delay and phase delay, what actually happens when a loudspeaker driver moves outward and inward, and the effects of polarity and phase flip. True reference material with detailed mathematical expressions and numerical analysis. This article was originally published in audioXpress, June 2023.

Active Acoustics, Noise Cancellation, and Product Development in audioXpress August 2023

July 14, 2023 by audioXpress Staff

Active Acoustics, Noise Cancellation, and Product Development in audioXpress August 2023

As audioXpress August 2023 focus on Acoustics, read the report on Electroacoustic Enhancement and Active Acoustics. René Christensen details the model and application of the SonicEdge Ultrasound Speaker. Philipp Paul Klose writes about Noise Cancellation in Automotive Audio. And we visit the Western Electric Tube Factory in Rossville, GA. Read the AXPONA 2023 show report, how to Design a True Midrange Driver, and how to build an Instrumentation Amplifier-Based Preamplifier Line Stage.

Audio Amplifiers and Exciting Innovations in audioXpress July 2023

June 12, 2023 by audioXpress Staff

Audio Amplifiers and Exciting Innovations in audioXpress July 2023

audioXpress July 2023 provides an updated market and technology overview of Audio Amplifiers, includes the review of the Hypex Nilai500DIY 500W Power Amplifier Kits, a visit to Dutch company Grimm Audio, and an interview with Rémi Guastavino to discuss the new GRAS EQset measurement microphone series. Plus a review of the new WiiM Pro Music Streaming System, a new article series about Bass Reflex speaker performance, and a lot more.

Spatial, Immersive, Inside and Out Automotive Sound in audioXpress June 2023

May 11, 2023 by audioXpress Staff

Spatial, Immersive, Inside and Out Automotive Sound in audioXpress June 2023

audioXpress June 2023 combines must-read articles on Automotive Audio, essential knowledge, cutting-edge R&D, practical build projects and much more. Learn about the latest innovations and sound design for Electric Vehicles. Read about DSP tuning in automotive audio. Learn about Audioscenic's extraordinary journey in 3D audio beamforming technology, build a new signal amplifier and processor for the ACH-01 Accelerometer, and much more.

Hearables, Headphones Testing, Audio Electronics, and More in audioXpress April 2023

March 10, 2023 by audioXpress Staff

Hearables, Headphones Testing, Audio Electronics, and More in audioXpress April 2023

Want to understand what's ahead in the most revolutionary audio product category of the 21st century? Read the State of the Hearables Industry Market Update. And for product developers and manufacturers, there's also a Headphones Test and Measurement report. Burkhard Vogel discusses op-amp noise in simulated models, Bruce E. Gillingham offers a complete monoblock power amplifier project, and René Christensen writes about acoustic topology optimization. And so much more....

audioXpress March 2023 Test and Measurement Issue Now Available!

February 10, 2023 by audioXpress Staff

audioXpress March 2023 Test and Measurement Issue Now Available!

audioXpress March 2023 offers an overview of the latest solutions and trends in audio measurement. Stuart Yaniger reviews the new Echo AIO modular audio test system, Philipp P. Klose writes about measurements in automotive audio environments, and Steve Temme shares his knowledge on audio testing in the production line. René Christensen explores Lumped Element Modeling of Transducers, Chuck Hansen expands the topic of power transformer losses, and Ethan Winer concludes his two-part article about Modern PCB Design Practices.

Find the Best Way to Kickstart Your Audio Developments in audioXpress January 2023

December 12, 2022 by audioXpress Staff

Find the Best Way to Kickstart Your Audio Developments in audioXpress January 2023

Multiple perspectives to inspire you in the new year. A Market Update on Bone Conduction Transducers, an article on the development of the Taction Transporter haptic transducer, and a valuable article by Hans W. Gierlich explaining an effective approach for testing structure-borne sound applied to in-ear developments. Andrew Bellavia writes about why the FDA’s OTC hearing aid rule could be quickly obsolete, Adam Levenson introduces the new Audio Foundry automotive audio development platform, and René Christensen makes its debut with audioXpress, writing about simulation techniques

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