audioXpress Magazine - August 2018

In this issue

8 High End 2018
Higher-End Audio Electronics in Munich
By Ward Maas

18 The Challenges of
Live Recordings
By Neville Roberts
Making a high-quality audio recording in a recording studio is one thing, but making a similar recording at a live concert has its own challenges.

SOUND CONTROL
26 What Was That Masked Sound Anyway?
By Richard Honeycutt

30 Acoustic Solutions
Round-Up 2018
By J. Martins
Learn more about the companies that offer innovative acoustic treatment solutions, and their latest products and materials.

38 COMSOL Multiphysics Acoustics Module
Making the Case for Acoustic Modeling and Simulation Apps
By Mads J. Herring Jensen
This article discusses modeling software in terms of the ability to couple physics effects relevant to the full system.

40 Curing the Open Office Noise Epidemic...With Nature?
By Robert Manassero
Noise distraction is the number one complaint for open plan office workers according to a recent study from Oxford Economics. Plantronics tested and developed its own solution to noise and distraction using biophilic acoustics or acoustics based on elements from nature.

46 Measuring the Performance of Diaphragm Absorbers
By Jorge Castro, Nathaniel Bailey,
Bruno Fazenda, and Kelvin Griffiths
This article aims to describe empirical and finite element analysis prediction of the performance of weighted diaphragmatic membrane absorbers, which is the predominant acoustic core employed in Artnovion low-frequency absorbers, such as the “Corner Bass Trap” and the “Sub Trap” range.

56 Current Feedback: Fake News or the Real Deal? (Part 2)
A Detailed Examination of Current Feedback Amplifiers
By Christopher Paul
This article employs bench tests, simulations, and equations derived from various circuits to test the existence of current feedback. In Part 2, we take a detailed look at some commercially available current feedback amplifiers and voltage feedback amplifiers.