Hearing Protection Evaluation System

Award Information
Agency: Department of Defense
Branch: Army
Contract: W911QX-10-C-0080
Agency Tracking Number: A082-060-1529
Amount: $729,314.00
Phase: Phase II
Program: SBIR
Awards Year: 2010
Solicitation Year: N/A
Solicitation Topic Code: Army 08-060
Solicitation Number: N/A
Small Business Information
2020 Kraft Drive, Suite 3040, Blacksburg, VA, 24060
DUNS: 364131011
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Kenji Homma
 Research Scientist
 (540) 951-1284
Business Contact
 William Saunders
Title: President
Phone: (540) 951-1284
Email: will@adaptivetechinc.com
Research Institution
Selection of appropriate hearing protection devices (HPDs), such as earplugs and earmuffs, is important in mitigating noise-induced hearing loss among military personnel. The standard method of measuring the noise attenuation performances of HPDs is based on a psychoacoustic method involving human subjects, which is time-consuming, costly and inherently variable. It also cannot be used to measure the performance of earplugs with special acoustic features such as non-linear venting and active noise reduction, which are increasingly relevant for military use. An alternative is a physical measurement using a test fixture which has the advantage of being repeatable and efficient. However, conventional test fixtures are designed for the evaluation of earmuff-type HPDs and can be inaccurate for earplug-type HPDs. ATI is developing an advanced hearing protection evaluation system (HPES) which can assess a wider range of HPDs including earplugs. HPES is essentially a simulated human head with sufficient acousto-mechanical emulations for accurate evaluation of a variety of HPDs. The fixture is designed with the capability to accurately measure earplug attenuations, large microphone dynamic range and ability to take into account the bone conduction effect. This Phase II SBIR research will further refine the Phase I HPES design and develop a pre-production prototype.

* Information listed above is at the time of submission. *

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