audioXpress Magazine July 2025

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audioXpress Magazine August 2025

audioXpress remains the authority on audio and reproduced sound by connecting manufacturers and distributors with developers, buyers and consultants around the globe! It's readers are the audio product designers, consultants, integrators, DIY enthusiasts, opinion leaders and your best customers. All of them agree that the coverage of trending topics, unique in the audio industry, make audioXpress a must read.

Every month, audioXpress combines the best educational articles on topic such audio electronics, speaker and headphone design, amplifiers (from tube to Class D), acoustics, practical test and measurement, audio engineering praxis, and standards. audioXpress provides inside stories on new audio developments, on R&D Stories, the most complete objective reviews of innovative products and software, and selects some of the best DIY audio projects from worldwide experts.

The Endless Mysteries Of Acoustics
Real-time simulation of acoustic environments now includes auralization.
Editorial By J. Martins
I had great experiences at AXPONA and the High End Show in Munich this year. Both shows are extremely influential in projecting trends every year, revealing both the extreme high-end of audio designs for those that are aiming for the ultimate and the latest concepts for the more approachable home audio tiers of the market, which increasingly also include more high-quality lifestyle products. On top of the audio and design innovations that audioXpress reports, those trade shows reveal the overall directions for audio technology for the home market, showing how brands are revived and refreshed, and how technology creates new listening possibilities in the living room, for entertainment systems, and even whole home and multiroom approaches. This is more noticeable at the European show, and needs to be reinforced in the expo area of AXPONA, creating a welcome and much-needed opportunity for more mainstream products and brands, many of whom have more products than those they are able to fit in a listening room.
---> The Endless Mysteries Of Acoustics.

5 Supporting Companies

Features
50 The Audio Circuits Cookbook By Ethan Winer
Practical Circuits And A Touch Of The Old-School Charm
By Dimitri Danyuk
In this book review, we delve into Ethan Winer's
The Audio Circuits Cookbook, which is exactly what
the title promises—a rich, no-nonsense collection of
audio-related circuits that bridges the gap between
textbook theory and real-world application.

52 Neumann RIME
Reference Immersive Monitoring Environment
By Philipp Paul Klose
Neumann RIME (Reference Immersive Monitoring
Environment) is a headphone correction and
binauralizer plug-in for the Neumann NDH 20 and
NDH 30 headphones, making immersive and stereo
production workflows practical and reliable.

60 A Microacoustics Modeling Primer Part 2
Numerical Modeling
By René Christensen
This two-part article is a deep dive on the topic
of modeling acoustic losses in small or narrow
geometries, discussing various thermoviscous loss
models, and categorizing these models into analytical
and numerical approaches. After discussing the
analytical implementation methods in the first part,
this article now expands on the numerical modeling.

Columns
Sound Control
44 Acoustical Effects Of Floor Finishes
By Richard Honeycutt
In any room where acoustics are important—be it a studio, a rehearsal room, a lobby, a conference room, a
classroom, an auditorium, a lecture hall, a sanctuary, or whatever—the effects of the floor finish must be considered.
This article explains why.

Acoustics
Market Update
8 New Dimensions In Acoustics
By João Martins
In previous Market Updates about acoustics, we explored several first-approach solutions
for acoustics treatment for all sorts of environments and objective applications. But
there's much more to acoustics, and this year we discuss ways companies are leveraging
more advanced simulation and analysis tools to address acoustics-related solutions.

22 The Room Impulse Response (RIR) Paradox
Audio Machine Learning Needs Better Physics, Not Just More Voices
By Daniel Gert Nielsen
This article explores the disconnect between sophisticated source generation and often
simplistic environmental simulation, arguing for a renewed focus on physics-based Room
Impulse Responses (RIR) and highlighting how new simulation capabilities, such as those
offered by platforms such as the Treble SDK, are paving the way to truly advance the field.

26 Real-Time Acoustic Simulation
EASE 5's Acousteer Engine Redefines Design Workflows
By Stefan Feistel and Wolfgang Ahnert
Acoustic simulation has long been a cornerstone for audio professionals, yet the iterative
process of design, calculation, and analysis has traditionally been hampered by significant
computation times and laborious workflows. AFMG's new Acousteer engine transforms
direct sound field simulation into an interactive, real-time experience.

34 Anechoic Chamber Design Fundamentals
By Neil A. Shaw
This article offers a detailed and experience-founded overview of some of the physical,
acoustical, electrical, and other fundamental considerations that are essential in the
acoustic design, planning, and implementation of anechoic chambers.

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