This sound frequency meter circuit is simple to build and can be constructed in a portable format. In can measure frequencies with a minimum level of 10 mVrms and a maximum frequency of up to 100kHz.

Beaverton, Oregon—If you're developing a multi-channel audio product such as a Dolby 7.1 Surround Sound or automotive sound system, here's news of a PC-controlled tester from Audio Precision, Inc.

High-quality audio devices and wearables are becoming more common and affordable, and that means there are more options than ever when it comes to purchasing. And audio quality itself is a subjective ...