NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Collections About News Help Login
Back to Results
A Comparison of Signal Enhancement Methods for Extracting Tonal Acoustic SignalsThe measurement of pure tone acoustic pressure signals in the presence of masking noise, often generated by mean flow, is a continual problem in the field of passive liner duct acoustics research. In support of the Advanced Subsonic Technology Noise Reduction Program, methods were investigated for conducting measurements of advanced duct liner concepts in harsh, aeroacoustic environments. This report presents the results of a comparison study of three signal extraction methods for acquiring quality acoustic pressure measurements in the presence of broadband noise (used to simulate the effects of mean flow). The performance of each method was compared to a baseline measurement of a pure tone acoustic pressure 3 dB above a uniform, broadband noise background.
Document ID
19980201049
Acquisition Source
Langley Research Center
Document Type
Technical Memorandum (TM)
Authors
Jones, Michael G. (NASA Langley Research Center Hampton, VA United States)
Date Acquired
September 6, 2013
Publication Date
May 1, 1998
Subject Category
Acoustics
Report/Patent Number
L-17736
NASA/TM-1998-208426
NAS 1.15:208426
Funding Number(s)
PROJECT: RTOP 538-03-12-02
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

Related Records

There are no records associated with this record.
No Preview Available