Acoustics

Sest, Inc. has proven performance and demonstrated capabilities in the Quite Aircraft Technology development and research specifically in the following areas:

• Wind Tunnel and anechoic chamber test project engineering


• Aerodynamic and acoustic data analysis, comparison to theory, and reporting


• Noise characterization and control/reduction


• Noise reduction concept development such as trail edge blowing of fan blades


• Determine requirements, selection and installation of data acquisition systems


• Integration of electronic measurement and control devices with computers for data acquisition


• Selection and setup of Pressure transducers, Strain gages, Accelerometers, Hotwire anemometer


• Expertise in LABVIEW, MATLAB, MATHEMATICA BASIC, FORTRAN, and C programming for data acquisition

Following are some examples of the completed acoustics projects:

Inlet Mode Measurement with ICD Array
Active Noise Reduction Concept
Trail Edge Blowing

Inlet Mode Measurement with ICD Array

Schematic of Active Noise Control Fan General location of microphone ICD



Measured ICD microphone data for 16 blades, 10 rods, 30 vans, 2200 RPMC

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Active Noise Reduction Concept

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Trail Edge Blowing

Flow path through blade with outer skin removed



Flow path through the shaft and hub

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