Acoustic test fixtures: From KEMAR and beyond!

Abstract

In 1972, KEMAR was introduced to the world. Based on the average of about 5000 males and females from the U.S. Air Force. It was the first head and torso simulator designed especially for acoustic research and enabled the hearing aid laboratories to perform simulated in-situ measurements of hearing aids. Today, more than 47 years after its introduction, KEMAR is able to test any device that contains both loudspeakers and microphones as well as performing binaural recordings of product sound and music. Fixturing, ear simulators, and special microphones, also known as couplers, are used by acousticians and engineers to design and test the many forms of modern acoustic electronics used from entertainment (Ear Buds, Headphones, IEMs, Smart Speakers, etc.), to hearing protection (Noise Cancelation), to medical devices (Hearing and Augmentation and Aids), to automotive cabins and sound systems, to military headsets alike. This presentation will discuss the evolution, ongoing design challenges, and future direction of Acoustic Test Fixtures required for the acoustic discovery and development going forward.In 1972, KEMAR was introduced to the world. Based on the average of about 5000 males and females from the U.S. Air Force. It was the first head and torso simulator designed especially for acoustic research and enabled the hearing aid laboratories to perform simulated in-situ measurements of hearing aids. Today, more than 47 years after its introduction, KEMAR is able to test any device that contains both loudspeakers and microphones as well as performing binaural recordings of product sound and music. Fixturing, ear simulators, and special microphones, also known as couplers, are used by acousticians and engineers to design and test the many forms of modern acoustic electronics used from entertainment (Ear Buds, Headphones, IEMs, Smart Speakers, etc.), to hearing protection (Noise Cancelation), to medical devices (Hearing and Augmentation and Aids), to automotive cabins and sound systems, to military headsets alike. This presentation will discuss the evolution, ongoing design challenges, and future direct...