All items tagged with acoustics (103)

Patent Review: Dynamic Acoustic Waveguide

October 26, 2022 by James Croft

Patent Review: Dynamic Acoustic Waveguide

James Croft reviews another patent of a concept ignoring abundant prior art, which apparently wasn’t scrutinized by industry experts - as it should. The patent "Dynamic Acoustic Waveguide," was awarded to William Eugene Wheeler (High Ridge, MO) as inventor and assignee, and describes a “loudspeaker and a method of operation that allow for the production and emphasis of extremely low bass tones.

John Calder Creates Calder Acoustics

September 21, 2022 by audioXpress Staff

John Calder Creates Calder Acoustics

John Calder started in the music and sound business as a teenager playing drums in a surf band, and later became a successful recording engineer, working in Minneapolis, Los Angeles, Milan and Montreal. His interest in acoustics lead him to work in studio design. After 10 years with Acoustical Surfaces (ASI), were he created and led the Acoustic Geometry brand, he now started as an independent room acoustics designer as Calder Acoustics, based in Minneapolis, MN.

Acoustics and Great Audio Electronics in audioXpress August 2022

July 12, 2022 by audioXpress Staff

Acoustics and Great Audio Electronics in audioXpress August 2022

The August 2022 issue of audioXpress, Acoustics Focus, gives a unique overview of market trends in acoustical products, with great articles on Acoustic Diffusion, Distributed Subwoofers for Room Modes, and Reverberation Control and Measurement. Michel Nieuwenhuizen proposes an improved microphone preamp for condenser microphones, Aren van Waarde builds a minimalist preamp using only discrete transistors, and Ethan Winer shares circuits for VCA and VCF analog synthesizer modules.

Patent Review: An Orthogonal Ergonomic Speaker

July 6, 2022 by James Croft

Patent Review: An Orthogonal Ergonomic Speaker

This review looks at an independently patent submitted in 2013 and awarded in 2016 to Jack Nilsson (Canton, OH), describing a system and method for an audio system including a first speaker that reproduces sounds in a first frequency range and a second speaker that reproduces sounds in second frequency range. As James Croft comments, the patent is interesting in its purposeful application of breaking currently established rules and may be useful in certain applications or environments. This article was originally published in Voice Coil, August 2016.

NTi Audio Introduces XL3 Acoustic Analyzer and Sound Level Meter

June 16, 2022 by Joao Martins

NTi Audio Introduces XL3 Acoustic Analyzer and Sound Level Meter

NTi Audio announced its latest generation handheld measurement solution, the XL3 Acoustic Analyzer. This is a completely new design, evolving from the extremely popular XL2, adding USB-C, wireless web connectivity, a large color touchscreen, and multi-language interface. The XL3 is a complete professional sound level meter and acoustic analyzer dedicated to noise measurements, room acoustics and building acoustics applications, complemented by a range of optional software modules and functions.

Noise and Vibration Expert Jacques Burillier Joins NTi Audio

May 27, 2022 by Joao Martins

Noise and Vibration Expert Jacques Burillier Joins NTi Audio

NTi Audio, a leading manufacturer of test and measurement solutions for acoustics, audio and vibration applications, announce the appointment of Jacques Burillier as International Business Development Manager. According to the Luxembourg-based company, this appointment marks a milestone in NTi Audio's journey, intended to propel the group into the first league of Noise and Vibration solutions providers. Burillier joins NTi after 23 years working in this field.

Patent Review: An Acoustic Device from Bose

May 12, 2022 by James Croft

Patent Review: An Acoustic Device from Bose

This patent analysis looks at an interesting wearable acoustic device, patented by five inventors on behalf of Bose Corp, and which the company would later apply in its Bose SoundWear Companion - the brand's own iteration of an around-the-neck or neckband concept, launched at the end of 2017. With a significant number of claims, the awarded patent describes “a neck loop that is constructed and arranged to be worn around the neck," with drivers located, one each, below the left and right ears of the user, and two acoustically coupled waveguides.

From Microspeakers to Room Acoustics: COMSOL Promotes Three Acoustics Simulation Online Events

April 21, 2022 by audioXpress Staff

From Microspeakers to Room Acoustics: COMSOL Promotes Three Acoustics Simulation Online Events

COMSOL continues its global virtual event series with COMSOL Day: Acoustics, to be held in three different time zones, with each event featuring a one-day program focusing on acoustics simulation using COMSOL Multiphysics software. Sessions will be hosted online on April 28, May 5, and May 19 by organizers in the USA, Europe, and China, respectively. Three online COMSOL Day events will showcase the benefits of multiphysics simulation to industries developing audio and acoustics products.

Patent Review: Apparatus Using Missing Fundamental Frequencies to Improve Loudspeaker Sound Focusing

March 16, 2022 by James Croft

Patent Review: Apparatus Using Missing Fundamental Frequencies to Improve Loudspeaker Sound Focusing

This review discusses an invention that promises to successfully process an audio signal to focus an acoustic signal by an arrangement of a plurality of loudspeakers, using a frequency analyzer, a signal processor, and a signal output interface. The frequency analyzer is configured to determine a fundamental frequency and the signal processor configured to adapt an overtone of the fundamental frequency. An approach that can work quite well, even though there are well-known drawbacks that the patent intends to resolve.

Voice for True Wireless Earbuds, GaN, and More Exciting Audio Frontiers in audioXpress April 2022

March 11, 2022 by audioXpress Staff

Voice for True Wireless Earbuds, GaN, and More Exciting Audio Frontiers in audioXpress April 2022

The April 2022 issue of audioXpress offers an overview of voice for true wireless stereo earbuds with contributed articles from Knowles and Fluent.ai. Stuart Yaniger reviews the possibilities with GaN amplifiers, and Steve Temme explains the evolution of Rub & Buzz measurements and the latest perceptual algorithms. Ethan Winer designs a sample & hold circuit for a guitar-controlled, all-analog synthesizer project, Richard Honeycutt explores the meaning of “frequency response” as applied to rooms, and Mark Driedger explains why and how to test tubes.

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