In-Ear Technology Meets Music Fidelity in audioXpress April 2024!

Read the latest Earbuds and Hearables market update. sensiBel experts explain everything about the advantages of Microphone Array Beamforming with Optical MEMS Microphones. GRAS' researchers share their findings about Ear Canal Geometry for In-Ear Headphone Testing. Learn how Hearing and Audio affects our perception of music fidelity. Jan Didden interviews Menno van der Veen. Andrew Russell shares his High-Performance 60-Watt Class A Amplifier project, and Tom Perazella explains how to build a Comprehensive AC Power Controller.

Audio Precision released the latest update to its APx500 audio measurement software, version 7.0, adding new enhancements suited to a wide range of audio test applications, whether analog, digital, or acoustic. In parallel with release 7.0, Audio Precision is also introducing APx500 software subscriptions, offering APx users an alternative in how they license APx software, and access nearly any software version and option.

To help engineers and acousticians achieve accurate measurements in everyday tasks, Bruel & Kjaer has created a robust and reliable 1/2-inch CCLD pressure-field microphone - Type 4971-H-041. This new microphone was designed for measuring close to hard reflective surfaces, close to sound ports of audio devices or in flush mountings. The new Bruel microphone is also suitable for random-incidence measurements and free-field measurements with 90° incidence.

Bruel & Kjaer has a new miniature microphone ideal for high-precision acoustic measurements tests within confined spaces – Type 4988-A. A mini, yet mighty microphone, this new 1/4" low noise, prepolarized, all titanium microphone was designed to help engineers and acousticians achieve accurate measurements in everyday tasks. The new Type 4988-A is flat from 20Hz to 20KHz (±1 dB) and can be used close to hard reflective surfaces, or very close to sound ports of an audio device.

Measurement microphones are a special class of microphones, ranging from laboratory precision instruments to products used for fine tuning sound systems in commercial or residential settings. Measurement microphone pricing varies greatly from $10 to 4,000. The quality differs immensely and there are many choices in between. This article was published originally in Voice Coil October 2012.