All items tagged with resonance (11)

Alta Audio Receives US Patent for its XTL II Hybrid Transmission Line Technology

June 5, 2024 by Joao Martins

Alta Audio Receives US Patent for its XTL II Hybrid Transmission Line Technology

Alta Audio, the company created by industry veteran Michael Levy, announced that it received US patent 11917361B2 for its XTL Transmission Line technology. Recently introduced in the company's latest Aphrodite four-way loudspeaker, updating an already patented original technology that applies the cabinet internal geometry to tune the frequency response, the new approach evolves to a hybrid transmission line, a ported enclosure design that Michael Levy says greatly increases power handling, lowers distortion, and extends bass frequencies.

R&D Stories: The Role of Resonance in Audio Clarity

February 14, 2024 by Roger Tall

R&D Stories: The Role of Resonance in Audio Clarity

Years of research conducted by ClarityCap, the audio capacitor manufacturer, and the UK-based Institute of Acoustics at the University of Salford, explored how the resonance from the body of a capacitor in a loudspeaker crossover circuit has an audible impact on sound quality. The article details the extensive testing, measurements, and conclusions, which allowed ClarityCap to perfect its manufacturing process, minimizing resonances in capacitors. This article was originally published in audioXpress, January 2024.

What About Loudspeaker Damping Factor and How Much Do I Need?

January 5, 2024 by Jan Didden

What About Loudspeaker Damping Factor and How Much Do I Need?

A loudspeaker is a mechanically moving system and like any such system, it cannot stop moving in zero time. For example, if a tone is reproduced, and the amplifier outputs a zero voltage at the end of the tone, the speaker cone will not stop immediately but will tend to keep on moving with lower and lower amplitude and eventually come to a stop. Jan Didden explores Loudspeaker Damping Factor in simple terms.

Continental and Sennheiser Developed New Sound Actuator Solution for Vehicle Audio

January 27, 2020 by audioXpress Staff

Continental and Sennheiser Developed New Sound Actuator Solution for Vehicle Audio

One of the key technology demonstrations in automotive audio at CES 2020 was promoted by Continental and audio specialist Sennheiser. The two German companies presented a "speakerless" audio system for the vehicle interior, which Sennheiser claims is able to generate immersive audio by exciting surfaces inside the vehicle to produce sound. The Continental actuator solution - Ac2ated Sound - reduces weight and space by up to 90% in comparison to conventional systems.

Back EMF Phase Relationships in Moving-Coil Loudspeakers - Part 4

January 23, 2020 by Andy Lewis

Back EMF Phase Relationships in Moving-Coil Loudspeakers - Part 4

In this final article of the four-part series, Andy Lewis expands upon the Back EMF concepts hinted at in the previous three articles in this series. This article explores the Electrical and Newtonian filters and their intersections, observations on reactive parallel filters as pertains to Back EMF and energy losses. The theories can be applied to virtually all areas of loudspeaker design. This article was originally published in audioXpress, November 2018.

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Back EMF Phase Relationships in Moving-Coil Loudspeakers - Part 3

January 15, 2020 by Andy Lewis

Back EMF Phase Relationships in Moving-Coil Loudspeakers - Part 3

In the third article of the four-part series, Andy Lewis continues his fascinating exploration of Back EMF Phase Relationships in Moving-Coil Loudspeakers. The author discusses what causes Back EMF to simulate inductor, capacitor, or resistor (LCR) components, and explores the concept of slip, in order to explain how and why it causes the impedance to be inductive, resistive, or capacitive, depending on frequency. This article was originally published in audioXpress, July 2018

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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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Back EMF Phase Relationships in Moving-Coil Loudspeakers - Part 1

December 26, 2019 by Andy Lewis

Back EMF Phase Relationships in Moving-Coil Loudspeakers - Part 1

In this article, Andy Lewis explores the generation of Back EMF in the region of a loudspeaker’s resonance. He also demonstrates a method for calculating the position of the moving assembly (or “cone”) relative to input signal, using complex impedance measurements. This article - part of a four part series - was originally published in audioXpress, May 2018

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Speaker Design: Driver-Induced Vibrations

May 30, 2018 by Claudio Negro

Speaker Design: Driver-Induced Vibrations

In order to generate a sound, a driver must vibrate. But what happens when one or more drivers are placed on the same baffle? In the exact moment that the cone begins to move, it starts to transmit — through the frame and the screws — vibrations to the cabinet and to the other drivers that are fixed on it. This article discusses multiples approaches to handle the problem, working on material, dimension, thickness, density, rigidity, and damping of the panels to be used. This article was published in audioXpress, February 2008.

Yamaha AFC3 Generates Positive Response at 52nd AES Conference

October 11, 2013 by Joao Martins

Yamaha AFC3 Generates Positive Response at 52nd AES Conference

Yamaha Commercial Audio sponsored the 52ndAudio Engineering Society (AES) Conference, which was held at the University of Surrey, Guildford, UK. Yamaha gave a comprehensive demonstration of the recent Active Field Control system (AFC3), which attracted a lot of positive attention. …

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