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Novel Acoustic Materials for Passive Hearing Protection

Award Information

Agency:
Department of Defense
Branch:
Defense Advanced Research Projects Agency
Award ID:
Program Year/Program:
2012 / SBIR
Agency Tracking Number:
D2-1139
Solicitation Year:
2010
Solicitation Topic Code:
SB103-006
Solicitation Number:
2010.3
Small Business Information
Oceanit Laboratories, Inc.
Oceanit Center 828 Fort Street Mall, Suite 600 Honolulu, HI -
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Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 2
Fiscal Year: 2012
Title: Novel Acoustic Materials for Passive Hearing Protection
Agency / Branch: DOD / DARPA
Contract: D12PC00354
Award Amount: $1,000,000.00
 

Abstract:

Hearing loss is the number one disability of soldiers returning from today"s battlefield. Issued hearing protection devices are often not worn by soldiers because it can reduce situational awareness through undesired acoustic attenuation. Current passive hearing protection options cannot offer protection against high intensity noise such as gunshots and explosions while allowing users to hear everyday noises. The current state-of-the-art nonlinear hearing protection systems using orifice limiters suffer from broadband loss across important acoustic bands. A successful hearing protection system technology would enable selectively attenuation of noise amplitudes at different frequencies and filter harmful noise levels while allowing everyday conversation. Newly developed acoustic metamaterials may be leveraged to address this problem. Metamaterials are composite materials that derive their properties through their composite geometry. In a Phase I effort, Oceanit showed the feasibility of a unique metamaterial design that can provide a tunable frequency selective acoustic filter with amplitude-dependent attenuation. In the Phase II effort, Oceanit will develop, test and demonstrate prototype passive hearing protection devices ear plugs and earmuffs based on this unique tunable, amplitude-dependent metamaterial and demonstrate them to a Technology Readiness Level of 6.

Principal Investigator:

Chris Sullivan
Senior Aerospace Engineer
(808) 531-3017
CSullivan@OCEANIT.COM

Business Contact:

Ken Cheung
Science&Technology Mana
(808) 531-3017
kcheung@oceanit.com
Small Business Information at Submission:

Oceanit Laboratories, Inc.
Oceanit Center 828 Fort Street Mall, Suite 600 Honolulu, HI -

EIN/Tax ID: 990238128
DUNS: N/A
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No