Acoustic noise reduction for large aircraft

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N41756-03-M-1176
Agency Tracking Number: N031-2180
Amount: $68,869.00
Phase: Phase I
Program: SBIR
Awards Year: 2003
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
780 Lakefield Road, Unit G, Westlake Village, CA, 91361
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Bruce Walker
 Vice President
 (805) 373-8533
Business Contact
 Alan Hersh
Title: Vice President
Phone: (805) 373-8533
Research Institution
The feasibility of applying the following five in-house innovative active noise control technologies to suppress turbofan and turboprop engine noise will be investigated: (1) the design of a hybrid active/passive compact active control system, to reducetonal and broadband noise radiated by rotor/stator interaction in turbofan engines, (2) the design of an active control system to reduce aircraft turbofan engine inlet/exhaust tone noise generated when rotor tip speeds become transonic, (3) to assess thefeasibility of installing vane-mounted microphones for reference signal acquisition and quasi-near field duct-wall mounted actuators for anti-sound injection to suppress broadband rotor/stator noise,. (4) to develop active control double degree of freedomacoustic liners and (5) to assess the feasibility of installing active transducers to cancel radiated noise in specified directions to reduce noise footprint area. Development of a feasibile active control strategy to suppress excessive engine noisegenrated from naval aircraft offers the opportunity to meet the Navy's target goals to reduce source aircraft noise levels by more than 20dB.

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

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