All items in category Magazine Articles
Comparative Studies on the Behavior of Beryllium, Titanium, and CN Fiber Hybrid Dome in the Last Octave
by Peyu Vlaevski

Comparative Studies on the Behavior of Beryllium, Titanium, and CN Fiber Hybrid Dome in the Last Octave

For some years, Oberton has been conducting efforts in the development of a new composite fiber diaphragm, combining a low relative weight and a high damping factor as in beryllium, with mechanical characteristics similar to titanium. The article details the comparative study that took place directly within the research conducted by the famous loudspeaker manufacturer from Bulgaria. This article was originally published in Voice Coil, May 2020.
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Our Future Car: Audio Bubbles, Sterile Cockpits, New Business Models
by Elia Shenberger

Our Future Car: Audio Bubbles, Sterile Cockpits, New Business Models

We probably listen to more music and podcasts in our cars than anywhere else. Which means this is where we’re pushing the boundaries of audio experience — less noise, personalized sound zones, and control. And we’re more aware of the safety implications, not distracting or tiring the driver. This article was published in audioXpress, June 2020.
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Progress on Calculating Edge Effect of Acoustical Absorption
by Richard Honeycutt

Progress on Calculating Edge Effect of Acoustical Absorption

For his audioXpress monthly column Sound Control, Richard Honeycutt explored new methods to calculate the edge effect of acoustical absorption and the research behind these methods. The research focuses on the recognized fact that rooms in which Reverberation Time (RT) is important, requiring the application of absorptive wall panels, seem to achieve better results when the absorptive material is applied only to parts of each wall. The physical reasons behind this apparent anomaly are often lumped into the category of "edge effect." This article was originally published in audioXpress, December 2017.
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More Developments in Loudspeaker Enclosure Materials
by Mike Klasco

More Developments in Loudspeaker Enclosure Materials

In this report, Klasco once again shares his knowledge with loudspeaker enclosures and reports on the progress in enclosure materials and technologies in 2020. And if someone has interesting things to share about wood enclosures, composites, plastics, improved plastic-based formulas, ABS/PA (polyimide), thermoset and thermoplastic resins, bulk-molded and sheet-molded thermosets and more, it's certainly Mike Klasco. This article was originally published in Voice Coil, March 2020.
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R&D Stories: Acoustic Echo Canceller Calibration in Real Time
by Erica Yorga

R&D Stories: Acoustic Echo Canceller Calibration in Real Time

Is it an understatement to say that echo cancellation has been a kind of “holy grail” ever since the first conference call? Nureva’s patented Microphone Mist technology rethinks that quest in innovative ways. In this article, Erica Yorga shares how the development process of a real-time calibration method for acoustic echo cancellation awarded surprising results. This article was originally published in AudioXpress, June 2020. This article was originally published in AudioXpress, June 2020.
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Audio Precision APx500 Flex Audio Analyzer — Hands-On
by Vance Dickason

Audio Precision APx500 Flex Audio Analyzer — Hands-On

Vance Dickason writes about the Audio Precision APx500 Flex Audio Analyzer and shares his hands-on experience with this latest affordable analyzer solution, designed to work with third-party USB audio recording interfaces. Dan Knighten, AP's VP of Product Development, and Michael Martin, AP's Product Marketing Manager, brought a complete system to Dickason's place and assisted him in performing a series of R&D type measurements on the same driver featured in a Test Bench column. Which means, readers can compare the readings and results directly! This article was originally published in Voice Coil, March 2020.
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Speakers: Parts Is Parts - High-Polymer Film, Headphones, Microphones, and Other Audio Applications (Part 2)
by Mike Klasco and Steve Tatarunis

Speakers: Parts Is Parts - High-Polymer Film, Headphones, Microphones, and Other Audio Applications (Part 2)

Lightweight and flexible, piezoelectric film transducers can serve as highly reliable low-cost alternatives to more expensive speakers, headphones, microphones, and even musical instrument sound pickups. This second article about the technology focuses precisely on the many other successful applications of this technology. We can only hope that this article will serve as a reintroduction to the technology. This article was originally published in audioXpress May 2013.
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Speakers: Parts Is Parts - High-Polymer Film, The Lost Speaker Technology (Part 1)
by Mike Klasco and Steve Tatarunis

Speakers: Parts Is Parts - High-Polymer Film, The Lost Speaker Technology (Part 1)

This article explores Polyvinylidene Fluoride Film (PVDF), a piezoelectric polymer used in various transducers for headphones, microphones and loudspeakers. It seems that the audio engineering community at large is either not familiar with PVDF film or misunderstands PVDF piezoelectric film technology. Hopefully, this article will serve as an introduction (or reintroduction) to the technology. This article was originally published in audioXpress April 2013.
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The TechTube Blackburn E813CC: A New Approach to Tube Design
by Neville Roberts

The TechTube Blackburn E813CC: A New Approach to Tube Design

We invite our readers to a return to the past, when the original Blackburn manufacturing site where Millard tubes were once made, was shipping the TechTube Blackburn E813CC - an engineering effort to redesign the ECC83 dual triode, claiming more accuracy and more consistency. "The famous Blackburn MicroTech Solutions tube factory has launched the first in a line of audio tubes featuring the first radical re-design in tube technology in over 40 years," writes Neville Roberts in his original 2009 report for audioXpress.
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Fresh From the Bench: Dayton Audio Test System (DATS) V3
by David Logvin

Fresh From the Bench: Dayton Audio Test System (DATS) V3

After a decade of widespread use, the Dayton Audio Test System (DATS) has acquired an impressive reputation for fast and accurate testing. Now, Dayton Audio has taken the easy-to-use audio test system and improved it in almost every way when creating the DATS V3 Computer-Based Audio Component Test System. This is an ultraportable audio test system that provides a reliable method for collection of Thiele-Small parameters, loudspeaker measurements and component measurements. This article was originally published in audioXpress, March 2020.
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