Fresh From the Bench: G.R.A.S. Sound & Vibration RA040X Ear Simulator

Brent Butterworth reviews the new RA040X Ear Simulators from G.R.A.S. Sound & Vibration. Measuring headphone response at frequencies above-10 kHz has been an imprecise, non-standardized process. The new RA040X ear simulator represents part of an effort by G.R.A.S. Sound & Vibration to update headphone measurement equipment to suit the needs of today’s headphone industry, and make the measurements more meaningful. This article was originally published in audioXpress, March 2018.

Audio Precision introduced a series of calibrated measurement microphones to its portfolio, creating a robust solution for end-to-end testing of electro-acoustic components, products and systems. This expansion of Audio Precision's electro-acoustic test offering includes free-field, pre-polarized microphones, combining mic capsules with low-noise preamplifiers, an ideal complement to the APx line of audio analyzers, software and accessories.

audioXpress March 2016 issue focused on Test and Measurement and featured an exclusive review of a new very important device for the audio industry. In this article, Mike Klasco discusses the new G.R.A.S. 43BB Low-Noise Ear Simulator, which enables to test headphones, earphones, and hearing aid devices with an extended bandwidth, up to 20 kHz. This is an industry first and the new G.R.A.S. 43BB solution will be of great interest globally.

Rocky Mountain Audio Fest (RMAF) is the premier event in the United States for high-end audio and increasingly also for headphone and personal audio experiences. The 12th edition of RMAF is about to start once again at the Marriott Denver, CO (October 2-4) and promises to be the largest and best ever, with great seminars and product launches.