All items in category Magazine Articles
R&D Stories: A Groundbreaking Approach to Gain Control that Cuts Conference Call Annoyance
by Erica Yorga

R&D Stories: A Groundbreaking Approach to Gain Control that Cuts Conference Call Annoyance

Nureva was granted three new patents for its Microphone Mist technology, including the ability to focus sound signals in a shared 3D space, and the use of sound source positional information to derive automatic gain control output parameters. In this article, two Nureva’s engineers to explain the thought process that lead to these innovations, which give the company substantial market runway. This article was originally published in audioXpress, February 2020.
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The Impact of MEMS Speakers in Audio
by Mike Klasco

The Impact of MEMS Speakers in Audio

In this article for Voice Coil focused on MEMS loudspeakers, Mike Klasco reviews a bit of the history of the technology and previews the evolution and impact on the audio industry in general. The article examines MEMS devices in general, provides a basic explanation of how the various types of MEMS speakers work, and what commercialization challenges are ahead. This article was originally published in Voice Coil, December 2019.
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Fresh From the Bench: Audio Precision APx555 B Series Audio Analyzer
by Stuart Yaniger

Fresh From the Bench: Audio Precision APx555 B Series Audio Analyzer

Stuart Yaniger offers his review of the latest Audio Precision APx555 B Series audio analyzer, and the corresponding new updated V5 software for the APx series. The APx B series now features a new High Performance Sine Generator and a High Performance Sine Analyzer, which Audio Precision claims reduces THD+N to better than -120 dB, with a 1 MHz bandwidth and Fast Fourier Transforms (FFTs) of up to 1.2 million points. This article was published in audioXpress, December 2019.
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Fresh From the Bench: Benchmark HPA4 Headphone/Line Amplifier
by Gary Galo

Fresh From the Bench: Benchmark HPA4 Headphone/Line Amplifier

Gary Galo reviews the Benchmark HPA4, a reference headphone/line amplifier designed to deliver amplification of analog sources for audio enthusiasts, mixing and mastering engineers. Resulting from Benchmark’s collaboration with THX, the HPA4 features a THX-888 headphone amplifier for an output signal with high voltage, current, and and power complemented by low distortion, noise, and crosstalk. This article was published in audioXpress, November 2019.
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Book Review: A Look Inside Bob Cordell’s Designing Audio Power Amplifiers, 2nd Edition
by Jan Didden

Book Review: A Look Inside Bob Cordell’s Designing Audio Power Amplifiers, 2nd Edition

We know many of our readers will enjoy this extended book review by our technical editor, Jan Didden, about Bob Cordell’s Designing Audio Power Amplifiers, 2nd Edition. When Cordell published his long-awaited first edition of Audio Power Amplifier Design, it was hailed as a significant addition on the subject. Reactions of readers made it clear that Cordell hit his mark, and in this article, Didden explains why the long-awaited second edition is an essential buy. This review was originally published in audioXpress, October 2019.
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Bringing 6DoF to Live Recorded Audio and Video
by Piotr Szczechowiak

Bringing 6DoF to Live Recorded Audio and Video

In this article for audioXpress, Piotr Szczechowiak and Tomasz Zernicki, the two founders of Zylia, explore the fascinating world of true 6DoF (six degrees of freedom) audio experiences in 3D spaces. With 6DoF technology in VR/AR, users can experience 3D audio content from an unlimited number of listening points, wearing an appropriate headset and headphones to plug into an immersive experience that allows them to move freely through the entire audio soundscape. This article was originally published in audioXpress, October 2019.
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R&D Stories: Achieving Frictionless Lower-Power Application Connectivity with Data-Over-Sound
by Adib Mehrabi

R&D Stories: Achieving Frictionless Lower-Power Application Connectivity with Data-Over-Sound

Anytime we need to login to the local Wi-Fi or pair with another Bluetooth device, we think, "There must be a better way to do this!" That's precisely one of the exciting possibilities for data-over-sound technology. This article explains what else we can do with it, and how it works. It also explores how data-over-sound can be realized in embedded scenarios, and how Chirp’s new technology, using the Arm Cortex-M4 and Cortex-M7 processors, can be implemented in connected products. This article was originally published in audioXpress, November 2019.
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Zero Phase In Studio Monitors
by Vance Dickason

Zero Phase In Studio Monitors

This Voice Coil’s Spotlight, written by Vance Dickason with commentary from Floyd Toole, Wolfgang Klippel, Andrew Jones, and James Croft, focuses on Zero Phase in Studio Monitors. As Dickason explains, "the implication of using FIR filters to zero out the phase of a loudspeaker to improve its subjective performance seems inherently flawed given all the research done over years that concluded that the human ear is not very sensitive to phase or group delay." This article was originally published in Voice Coil, October 2019.
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Fresh From the Bench: The DPA d:vice MMA-A Mobile Recording Interface
by Stuart Yaniger

Fresh From the Bench: The DPA d:vice MMA-A Mobile Recording Interface

Stuart Yaniger reviews the DPA d:vice MMA-A Digital Audio Interface, a two-channel microphone preamp and A/D converter that allows the use of the renowned DPA microphones with any iOS device, a Mac or a PC. Apart from being an audio measurement expert, Yaniger is also an enthusiastic music recordist and this device not only fit in his pocket but he also found it to be "a slick piece of engineering and industrial design." Originally published in audioXpress, October 2019.
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2019 Midwest Audiofest Speaker Design Competition
by Thomas Perazella

2019 Midwest Audiofest Speaker Design Competition

One of the most important audio events for the speaker building and DIY audio communities, the Midwest Audiofest (MWAF) is held in Springboro, OH, in July every year. Sponsored by an impressive group of vendors and hosted by Parts Express, this event combines several activities including a huge tent sale at Parts Express. For Thomas Perazella the highlight of the event is the Speaker Design Competition, for which he was again one of the competition judges. This article was originally published in audioXpress, October 2019.
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