All items tagged with June 2018 (11)

Patent Review: Smart Bass Reflex Loudspeaker

October 25, 2023 by James Croft

Patent Review: Smart Bass Reflex Loudspeaker

James Croft (Croft Acoustical) reviews a very curious patent from Amazon Technologies, Inc. (Reno, NV), filed in 2013, and awarded in April 2017. Basically, the patent discusses a new technique to tune a port of a loudspeaker, in this case multiple ports that will be open or selectively closed, in function of an analysis of the frequencies of the signal being played. This article was originally published in Voice Coil, June 2018.

You Can DIY! The TSM-100 - A Turntable Speed Measurement Device

June 24, 2020 by George Ntanavaras

You Can DIY! The TSM-100 - A Turntable Speed Measurement Device

In this article, George Ntanavaras explains how to build a turntable speed measurement device using a microprocessor-controlled device that measures the speed of a turntable's platter. The project uses an Arduino board and the Arduino software IDE, and a micro sensor manufactured by Omron to sense the platter rotation. This article was originally published in audioXpress, June 2018.

Back EMF Phase Relationships in Moving-Coil Loudspeakers - Part 2

January 8, 2020 by Andy Lewis

Back EMF Phase Relationships in Moving-Coil Loudspeakers - Part 2

In this article series, Andy Lewis explores the generation of Back EMF in the region of a loudspeaker’s resonance. In this second article of the four-part series, he performs simple “thought experiments” to make qualitative observations about the activity of a moving-coil driver in the region of its resonance. This article was originally published in audioXpress, June 2018

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Audio Praxis: Mixing and Mastering for Today’s Music Streaming Services

September 20, 2018 by Jon Schorah

Audio Praxis: Mixing and Mastering for Today’s Music Streaming Services

On the cutting-edge of current audio industry trends, this article by Jon Schorah explains what you should know about delivering music to Spotify, Apple Music, TIDAL, and other platforms. Jon Schorah explains how to deal with different audio codecs, the effects of masking, Spectral Band Replication (SBS), Parametric Stereo (PS) and others way these services deal with data rate reduction, as well as loudness normalization. This article was originally published in audioXpress, June 2018.

R&D Stories: MPEG-H Audio Brings New Dimensions to TV Sound

September 20, 2018 by Stefan Meltzer

R&D Stories: MPEG-H Audio Brings New Dimensions to TV Sound

Fraunhofer Institute for Integrated Circuits IIS designed a way to significantly improve immersive sound reproduction capabilities on consumer playback devices, based on MPEG-H decoding and rendering and Fraunhofer’s upHear soundbar processing. This article is a technology update on MPEG-H and Fraunhofer upHear implementations, now available for licensing to audio video receiver (AVR) and soundbar manufacturers.

Test Bench: B&C Speakers DE680TN 1.4" Exit Pro Sound Compression Driver

September 5, 2018 by Vance Dickason

Test Bench: B&C Speakers DE680TN 1.4" Exit Pro Sound Compression Driver

The transducer I examined in this Test Bench came from Italian OEM manufacturer B&C Speakers. The DE680TN-8 compression driver is the latest addition to B&C Speakers’ extensive ferrite and neodymium motor 1.4” exit compression drivers. In terms of features, the titanium diaphragm has been redesigned and incorporates a new bent-edge former along with a new dome and surrounds geometry. This article was originally published in Voice Coil, June 2018.

Tang Band Speaker 25-2234SD High-Resolution 1-Inch Aluminum and Magnesium Dome Tweeter

August 29, 2018 by Vance Dickason

Tang Band Speaker 25-2234SD High-Resolution 1-Inch Aluminum and Magnesium Dome Tweeter

In this edition of Test Bench I characterized a transducer from Tang Band (TB) Speaker, the 25-2234SD, a new 1” high-resolution dome tweeter with response to 40 kHz. The 25-2234SD is a compact tweeter that features a 1” aluminum/magnesium inverted dome, a neodymium motor structure, an injection-molded faceplate, a protective grill, and a rear cavity with magnetic fluid in the motor gap for cooling. This article was originally published in Voice Coil, June 2018.

Test Bench: The T34A-4 Tweeter from BlieSMA

August 21, 2018 by Vance Dickason

Test Bench: The T34A-4 Tweeter from BlieSMA

BlieSMa was founded January 16, 2018, by Stas Malikov. The first product being released by BlieSMa is a 34 mm tweeter, the T34A-4. Available from May 2018, the T34A-4 is a 30 mm metal aluminum/magnesium alloy dome tweeter with a substantial feature set that includes extremely low moving mass, and a fully saturated neodymium motor with copper sleeve shorting ring. Particularly impressive is the T34A-4's extremely wide frequency range, going from 1.3 kHz to 35 kHz. This article was originally published in Voice Coil, June 2018.

R&D Stories: Engineering Voice-Enabled Smart Gadgets

July 18, 2018 by Ofer Elyakim

R&D Stories: Engineering Voice-Enabled Smart Gadgets

The first step companies face in enabling a voice user interface (VUI) experience is to decide whether to partner with a current market offering or to build a proprietary voice solution, which requires a significant amount of resources. In this article, Ofer Elyakim (Chief Executive Officer, DSP Group) offers an overview of DSP Group’s experience in enabling voice in a variety of new consumer electronics devices, using its open audio/voice DSP platform. This article was originally published in audioxpress, June 2018.

Prepare for Change: Voice Coil June 2018 is Ready to Download

May 24, 2018 by audioXpress Staff

Prepare for Change: Voice Coil June 2018 is Ready to Download

Preparing for the forthcoming InfoComm 2018 show, this edition of Voice Coil will be a welcome update for all industry professionals. Mike Klasco and Nora Wong discuss the latest trends and technologies for Earphones and Headphones, and provide an updated 2018 directory of leading OEM/ODM headphone and earphone factories. James Croft discusses a new Smart Bass Reflex Loudspeaker patent from Amazon, and Vance Dickason characterizes three different high-frequency drivers: one from a new company, BlieSMA, a dome tweeter from Tang Band (TB) Speaker, and a pro sound compression driver from B&C Speakers.

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