audioXpress - October 2021
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October 2021 issue Digital Access. - Magazine Details
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In this issue
FROM THE EDITOR’S DESK—Home Theater and Home Entertainment, by J. Martins, p. 4 USound Megaclite 4.0 UH-R2040 MEMS Earphones, by Brent Butterworth, p. 8 MARKET UPDATE—Raising the Bar on Residential Entertainment, by J. Martins, p. 14 The Complete Linear Audio Library on USB, Review by Gary Galo, Bob Cordell, and Dimitri Danyuk, p. 28 SOUND CONTROL—A Tale of Speakers in a Room, by Richard Honeycutt, p. 32
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Power Transformer Parameters, Selection, and Testing
Part 3 Insulation Materials, Winding Bobbins, and Testing Methods, In the previous two articles in this series, Chuck Hansen detailed the history of transformer cores and their various construction methods. This article explores transformer insulation materials and winding bobbins, and testing methods for the insulation system.
Loudspeaker Driver Displacement Decomposition
This valuable tutorial offers a unique overview on the possibilities of three-dimensional analysis of loudspeaker driver displacement, using Phase Decomposition and Axial-Symmetrical Decomposition techniques.
The Audio Foundry Automotive Audio Development Platform
This article details the possibilities of the Audio Foundry platform for automotive audio prototyping and to support the development of audio experiences in vehicles with powerful design tools and services. The result of a collaboration between Tymphany and DSP Concepts.
OTC Hearing Aids
Is Innovation Leaving the Rule Behind? A wave of new developments promises to solve the most pressing need for people with milder hearing loss, allowing mass-market hearables to supplant over-the-counter hearing aids with less stigma.
Acoustical Test Sources
The choice of a sound source for acoustical testing and reporting is decisive and should be determined according to the applications. Let’s explore the characteristics and benefits of available sources for acoustical measurements.
The Benefits of Using Structure-Borne Sound in Headset Signal Processing
This article details the latest testing strategies for bone conduction technology used in product development for headsets and in-ear devices. It showcases new possibilities for manufacturers to better evaluate device performance, since no appropriate test equipment and methods were commercially available until now.
Building a Haptic Dimension The Science Behind the Taction Transporter
Haptic motors are finding applications in gaming, music, VR/AR, and therapeutic/wellness. The Transporter is a patented transducer that delivers faster more accurate bass and is designed to work with the main audio driver in headphones. It subtly vibrates against the user’s skin to produce an extra dimension that can be described as a high-fidelity extension.
Bone Conductors Going Mainstream
Bone conduction technology that sends vibrations directly to the inner ear, bypassing the eardrums, is seeing increasing use-evolving from its origins in medical hearing devices to mainstream consumer and strategic communication applications. The advantages in open-ear wireless applications have great appeal and the audio industry is responding.
Unusual Tubes
Most aficionados of hollow-state electronics—at least most of the people reading this column—are familiar with the tubes most commonly used in classic or contemporary audio amplifiers. In this article, we explore some of the less common tube types used for audio applications.
Power Transformer Parameters, Selection, and Testing
Part 2 Transformer Cores and Their Construction Methods, In the second part of this article series, Chuck Hansen details the history of transformer cores and shares information about their various construction methods.
