NASA/Langley Research Center, Mail Stop 144, Industry Assistance Office, Hampton, VA 23681-0001

A -- RESEARCH IN AIRCRAFT ACOUSTICS AND NOISE CONTROL SOL 1-109-DF.1336 DUE 062899 POC Betty Mayhew, Contract Specialist, Phone (757)-864-2530, Fax (757) 864-7709, Email B.B.MAYHEW@larc.nasa.gov WEB: Click here for the latest information about this notice, http://nais.nasa.gov/EPS/LaRC/date.html#1-109-DF.1336. E-MAIL: Betty Mayhew, B.B.MAYHEW@larc.nasa.gov. NASA/LaRC plans to issue a draft RFP via the internet, on or about April 23, l999. This document is for information and planning purposes and to allow industry the opportunity to verify reasonableness and feasibility of the requirement, as well as promote competition. Prospective offerors are invited to submit comments or questions to:Betty B. Mayhew/BID DISTRIBUTION OFFICE, no later than May 7,1999. In responding, reference Solicitation l-109-DF.1336. Description of Procurement: NASA has begun a program to improve the understanding, prediction and control of aircraft noise to meet the Environmental Compatibility goals of NASA's Aeronautics and Space Transportation Enterprise. These goals, which are necessary to meet increasingly stringent local, national, and international noise regulations, are to reduce the perceived level of aircraft noise in airport communities by 10 dB by 2007 and by 20 dB by 1027 without affecting safety or affordability. The objective of this contracting effort is to provide part of the required research in aircraft acoustics and noise control which will permit the attainment of the aggressive NASA goals. Because of the broad range of research and diverse disciplines and facilities required, the proposed research has been divided into the following work areas: A. Engine and Airframe Noise Prediction, Control and Measurement: Research areas include theoretical and experimental studies of engine fan tone and broadband noise, and jet noise; development of advanced noise reduction concepts including advanced nacelle liners and active control; development of fan, and jet noise prediction methods including effects of active control; development of advanced zero acoustics test methods and hardware; theoretical and experimental studies of the noise generated by airflow over high-lift devices and landing gears and by jet/flap interaction, including the development of Reynolds number and velocity scaling laws; noise reduction concepts and diagnostics utilizing both passive and active controlmethods based upon the fluid mechanics of the source; and improvements in microphone array technology emphasizing its extension for obtaining both directivity and quantitative spectra in reverberant chambers; B. Structural Acoustics and Aircraft Interior Noise Prediction and Control: Research areas include measurement and prediction of aircraft interior noise; development of diagnostic techniques to determine the paths by which noise reaches the passengers and crew of different classes of aircraft; development and implementation of active and passive noise and vibration control techniques for jet and propeller airplane and rotorcraft cabins; theoretical and experimental studies of the response and fatigue of aerospace structures to acoustic and fluctuating pressure loads; and development of advanced structural acoustics test methods and hardware; C. Rotorcraft Noise Prediction, Control and Measurement: Research areas include theoretical and experimental studies to understand aerodynamics and acoustic behavior of rotorcraft noise sources; development and demonstration of innovative methods of reduction of rotorcraft source noise, such as blade/vortex interaction noise high speed impulsive noise, and noise duet o fountain flow effect of tiltrotor aircraft; development of methodology for noise prediction and application studies and assessments; integration of acoustic models with other disciplines, such as aerodynamic performance, for tradeoff studies; and design, planning and execution of helicopter and tiltrotor flight tests for acquiring noise data bases for analytical validations; D. Community Noise Prediction and Impact: Research areas include analytical and experimental studies of long distance sound propagation in the atmosphere; development of models or algorithms for predicting aircraft noise exposure and for minimizing aircraft noise impact through flight track or profile optimization; assessment of aircraft noise exposure and the impact of that exposure on community residents and structures; surveys of reactions of community residents to aircraft flyover noise and sonic booms; development of models for predicting community response to aircraft noise; and development of models for predicting the overall impact of aircraft noise on areas close to and remote from airports, which considers population distributions, land use, terrain, ambient noise levels, wildlife, and historical or archeological sites. This DRFP is issued to solicit industry's comments on the requirements, planned terms and conditions of the proposed contract, instructions for proposal preparation and evaluation approaches. Potential offerors are specifically requested to identify unnecessary or inefficient requirements, and any barriers to the implementation of the program in a cost effective, performance based manner. Comments may be forwarded to Betty B. Mayhew via electronic transmission or by facsimile transmission. The Government does not intend to hold an industry workshop as part of the DFRP Process. A final RFP is planned for release on or about May 14, l999, with an anticipated proposal due date on or about June 29, l999. Any subsequent RFP will be synopsized prior to release. The Contractor shall furnish the management, personnel, materials, equipment, and facilities necessary to perform specific task orders as defined by the Government. An indefinite delivery, indefinite quantity contract with cost plus fixed fee/firm fixed price task orders is contemplated with a 4 = year period for issuance of task orders commencing November l999. The solicitation will contain the option to make multiple awards. Offerors may propose on one or more of the four Work Areas. The total potential value including all contracts awarded as a result of this procurement is $30 million. Specific work requirements will be issued in "performance-based" task orders. This procurement will be conducted on a full and open competitive basis and will include a fifteen (15) percent small business goal. Comments on the DRFP are not mandatory. The use of industry comments to structure the final RFP is at the discretion of the Government. Pursuant to FAR 52.215-3, Solicitation for Information and Planning Purposes, the Government does not intend to award a contract on the basis of this DRFP, or to otherwise pay for information solicited. The Government does not intend to acquire a commercial item using FAR Part 12. See Note 26. The SIC Code and Size Standard are 8731 and l,500, respectively. All qualified responsible sources may submit a proposal which shall be considered by the agency. Any questions regarding this announcement should be directed to the identified point of contact. An ombudsman has been appointed -- See Internet Note "B". The solicitation and any documents related to this procurement will be available over the Internet. These documents will be in Microsoft Office Suite (Word 6.0, Excel 5.0, or PowerPoint 4.0) format and will reside on a World Wide Web (WWW) server, which may be accessed using a WWW browser application. The WWW address, or URL of the NASA/LaRC Business Opportunities home page is http://procurement.nasa.gov/EPS/LaRC/class.html It is the offerors responsibility to monitor this cite for the release of the solicitation and amendments (if any). Potential offerors will be responsible for downloading their own copy of the solicitation and amendments, if any. Any referenced notes can be viewed at the following URL: http://cbdnet.access.gpo.gov/num-note.html and http://genesis.gsfc.nasa.gov/nasanote.html Posted 04/13/99 (D-SN318970). (0103)

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