USA flag logo/image

An Official Website of the United States Government

Portable Methane Flux Meter

Award Information

Environmental Protection Agency
Award ID:
Program Year/Program:
1999 / SBIR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Solicitation Number:
Small Business Information
Southwest Sciences, Inc.
NM Santa Fe, NM 87505-3993
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Phase 1
Fiscal Year: 1999
Title: Portable Methane Flux Meter
Agency: EPA
Contract: N/A
Award Amount: $70,000.00


Not Available Dynamic Structures and Materials proposes to develop dissipative acoustic arrays for the control of interior noise in launch vehicle payload fairings. The innovation in this work is the use of discrete noise control sources that utilize feedback control to dissipate acoustic energy. Acoustic energy dissipation is a robust method of reducing sound pressure levels in the interior of the payload fairings. The goal of the research is to provide payloads with a quieter ride to orbit through new methods of active acoustic suppression in launch vehicles. The motivation for this work is the control of low-frequency in small to medium-sized launch vehicle payload fairings. Low-frequency noise is a problem in launch vehicle fairings due to the lack of significant energy dissipation below 200 to 300 Hz. The conventional method for reducing fairing sound pressure levels is to line the interior with sound absorbing acoustic blankets. Although very effective at higher frequencies, acoustic blankets provide less sound absorption at frequencies in which the acoustic wavelength is large compared to the thickness of the material. The effectiveness of the passive acoustic treatment is limited at low frequencies by the thickness of the blanket material.

Principal Investigator:

Business Contact:

Small Business Information at Submission:

Southwest Sciences, Inc.
1570 Pacheco Street Suite E-11 Santa Fe, NM 87505

Number of Employees: N/A
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No