Hearing Protection Evaluation System

Award Information
Agency:
Department of Defense
Branch
Army
Amount:
$1,219,142.00
Award Year:
2010
Program:
SBIR
Phase:
Phase II
Contract:
W911QX-10-C-0080
Award Id:
n/a
Agency Tracking Number:
A2-4065
Solicitation Year:
2008
Solicitation Topic Code:
A08-060
Solicitation Number:
2008.2
Small Business Information
2020 Kraft Drive, Suite 3040, Blacksburg, VA, -
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
364131011
Principal Investigator:
Kenji Homma
Research Scientist
(540) 951-1284
kenji@adaptivetechinc.com
Business Contact:
William Saunders
President
(540) 951-1284
will@adaptivetechinc.com
Research Institution:
Stub




Abstract
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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