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

A -- A STUDY FOR "DEVELOPMENT AND TESTING OF A HIGH LEVEL AXIAL ARRAY DUCT SOUND SOURCE FOR THE NASA FLOW IMPEDANCE TEST LABORATORY" SOL 1-168-RBF.1003 DUE 081899 POC Kimberly D. Duncan, Contracting Officer, Phone (757) 864-3566, Fax (757) 864-8863, Email k.d.duncan@larc.nasa.gov WEB: Click here for the latest information about this notice, http://nais.nasa.gov/EPS/LaRC/date.html#1-168-RBF.1003. E-MAIL: Kimberly D. Duncan, k.d.duncan@larc.nasa.gov. NASA/LaRC plans to issue a Request for Quotation (RFQ) for a study for development and testing of a high level axial array duct sound source for the NASA Flow Impedance Test Laboratory. The Contractor shall implement an automated, optimal linear phased array of acoustic drivers modified to maximize acoustic coupling efficiency with the NASA Flow Impedance Tube (FIT) to achieve at least 155 dB from 0.5 to at least 4 kHz. The Contractor shall 1) fully automated (making use of Labview interface) the calculation and optimal phasing of a linear array of JBL-2485 acoustic compression drivers to achieve maximum sound pressures for discrete frequency type spectra in the NASA FIT. Determine optimum mechanical coupling configuration wit the NASA FIT. 2) investigate mechanical modifications of JBL-2485 compression drivers to achieve improved coupling efficiency to the NASA FIT when using an optimal phased array configuration. 3) investigate the feasibility of generating in the NASA FIT, symmetrically shaped, highintensity sound pulse trains, with peak amplitudes of at least 165 dB and periods ranging between 0.1 and 1 milliseconds. This procurement is being conducted under the Simplified Acquisition Procedures (SAP). NASA/LaRC intends to purchase the items Fuller Technologies, Inc., Virginia Beach, VA, unique services available from one source. Fuller Technologies is the only company that is able to 1) fabricate and configure specialized acoustic sources designed for efficient coupling to the NASA Flow Impedance Tube, 2) implement computer control of the acoustic driver phasing to maintain maximum acoustic power input to the system as system operating parameters change, and 3) provide automatic pulse shaping technology to achieve high peak level, symmetric pulse shapes. This combination of these features is unique to Fuller Technologies, Inc. Fuller Technologies provides the required blend of extensive background in signal processing and active control actuator technology robustness to increase the potential for successful implementation of this technique for the specialized requirements of the FITL. The Government does not intend to acquire a commercial item using FAR Part 12. See Note 26. Interested firms have 15 days from the publication of this synopsis to submit in writing to the identified point of contact, their qualifications/capabilities. Such qualifications/capabilities will be used solely for the purpose of determining whether or not to conduct this procurement on a competitive basis. Responses received after the 15 days or without the required information will be considered non-responsive to the synopsis and will not be considered. A determination by the Government to not compete this proposed effort on a full and open competitive basis, based upon responses to this notice is solely within the discretion of the Government. Oral communications [are/are not] acceptable in response to this notice. All responsible sources may submit an offer which shall be considered by the agency. An Ombudsman has been appointed. See Internet Note "B". Any referenced notes can be viewed at the following URLs: http://cbdnet.access.gpo.gov/num-note.html and http://genesis.gsfc.nasa.gov/nasanote.html Posted 08/05/99 (D-SN363654). (0217)

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