All items tagged with March 2022 (10)

Test Bench: Eighteen Sound NSD1095N Compression Driver and XT120 Horn

June 22, 2022 by Vance Dickason

Test Bench: Eighteen Sound NSD1095N Compression Driver and XT120 Horn

The NSD1095N is a 1" throat compression driver with a compact footprint for “high quality” sound applications in professional audio, from studio monitors or stage monitors to high-power sound reinforcement cabinets. It uses a field replaceable True Piston Motion (TPM) TiN coated titanium diaphragm, extending the frequency response by 25% and incorporates a proprietary phase plug architecture that has been designed to give a smooth coherent wave front at the horn entrance across the whole working frequency range.

Voice Coil Test Bench The U80W Air Motion Transformer from Mundorf

June 16, 2022 by Vance Dickason

Voice Coil Test Bench The U80W Air Motion Transformer from Mundorf

As a respected manufacturer of high-quality condensers and crossover components, Mundorf is also capitalizing on the industry's “renaissance” in AMTs and now offers five models in this updated U series, each driver having the same width, but different heights. The U80W AMT model features a 63mm x 19mm pleated proprietary AMT diaphragm, an optimized rear chamber, a flat face plate with an optional secondary aluminum face plate, and is rated for 80W power handling and 94dB sensitivity. The U Series is the fourth in Mundorf's AMT portfolio. This article was originally published in Voice Coil, March 2022.

Practical Test & Measurement - Measuring MEMS Microphone Arrays

June 16, 2022 by Joe Begin

Practical Test & Measurement - Measuring MEMS Microphone Arrays

This article addresses the practical approach to testing and evaluation of multichannel MEMS microphone arrays. The simultaneous acquisition and measurement of signals from a microphone array presents a variety of challenges to developers seeking to evaluate their designs. This article explains the fundamentals to address challenges in smartphones, smart speakers, and all sorts of voice-activated devices, typically using two, and up to seven or more microphones. This article was originally published in audioXpress, March 2022.

Fresh From the Bench: KEF KC62 Subwoofer with Uni-Core Driver Technology

May 17, 2022 by Oliver A.Masciarotte

Fresh From the Bench: KEF KC62 Subwoofer with Uni-Core Driver Technology

Following the review of the KEF LS50 Meta speakers for audioXpress, this article offers a detailed review of the KC62 compact subwoofer, which combines KEF's force-canceling and Uni-Core technologies in a new approach to allow maximizing bass in a minimum space. Masciarotte did the listening and spoke with Jack Sharkey, Senior Technical Engineer at GP Acoustics, about this fascinating design. The subwoofer was also measured by Peterson at Warkwyn’s facility using the Klippel measurement system.

Practical T&M: REST for Automated Test and Measurement

May 12, 2022 by Matt Taylor

Practical T&M: REST for Automated Test and Measurement

Adding a great perspective on the topic of test and measurement, in particular for production lines, this article makes the case for using web interfaces, and embrace web standards for automated testing of audio equipment. The founder of QuantAsylum advocates an open-design philosophy for controlling and querying things via REST, which stands for Representational State Transfer, a widely accepted set of guidelines for creating reliable web APIs and leveraging the know-how of millions of developers.

Development and Design: Sound Level Evaluation for Raspberry Pi 4

April 13, 2022 by Ben Chen

Development and Design: Sound Level Evaluation for Raspberry Pi 4

This article proposes a Sound Level Evaluation solution based on the popular Raspberry Pi 4 and the possibilities of using the Sfera Labs' Exo Sense Pi - a compact multi-sensor module - as a sound meter. The Exo Sense Pi combines several environmental sensors and connectivity options, and integrates a digital microphone which can be used to evaluate ambient noise levels or measuring noise sources. This article was originally published in audioXpress, March 2022.

Some Thoughts on Plastics for Speaker Enclosures

April 7, 2022 by Mike Klasco

Some Thoughts on Plastics for Speaker Enclosures

Discussing speaker enclosures, this article examines all the different options for plastic applications and the implications for loudspeaker driver design in general. Enclosure characteristics, construction features, advantage comparisons between wood and wood particle board cabinets, and production techniques are some of the topics explored. This article was published in Voice Coil, March 2022.

Echo Test + Measurement - Specifically Made for Audio Testing!

March 21, 2022 by Joao Martins

Echo Test + Measurement - Specifically Made for Audio Testing!

audioXpress March 2022 Test and Measurement issue addresses the latest tools and solutions meeting real-world challenges in audio. This year's extensive Market Update report, offers a complete overview of all the audio test and measurement products and solutions released during the past 12 months. One of the major highlights was Echo Test + Measurement, with its modular, and highly cost-effective range of audio test interface solutions.

Voice Coil March 2022 Focus on Speaker Enclosures

February 28, 2022 by audioXpress Staff

Voice Coil March 2022 Focus on Speaker Enclosures

The March 2022 issue of Voice Coil offers a complete overview of loudspeaker cabinet design options, plastic enclosure materials, and production techniques, as well as an updated directory of Speaker Enclosure Vendors. This month, in Test Bench, Vance Dickason characterizes the Mundorf U80W from its latest U Series of Air Motion Transformers. And addressing demanding professional audio applications, this issue also includes a Test Bench on Eighteen Sound’s NSD1095N Compression Driver and XT120 Horn. Start reading online. Printed copies are on the way.

The Audio Measurement Issue! audioXpress March 2022 is Now Available

February 11, 2022 by audioXpress Staff

The Audio Measurement Issue! audioXpress March 2022 is Now Available

audioXpress March 2022 features an extensive Market Update report on the latest audio test and measurement tools. Matt Taylor explains the possibilities of REST for automated test and measurement, and Joe Begin (Audio Precision) addresses testing multichannel MEMS microphone arrays. The KEF KC62 subwoofer is reviewed by Oliver Masciarotte and measured by Kent Peterson, and Ben Chen explains how to use the Sfera Labs' Exo Sense Pi module as a sound meter. Download or read online now.