Working Group on FFT Acoustical Analyzers

Chair: ASA Standards

Scope: To develop one or more standard(s) applicable both to stand-alone FFT analysis systems and PC or laptop-based methods.  The standard(s) would address limitations and constraints on FFT analysis of acoustic signals and would define test signals and FFT results for those test signals such that the performance of FFT analysis systems could be verified and calibrated.  The test signals would consist of sine wave, triangle waves, square waves, pink noise, white noise, and at least three impulses with different rise times and pulse widths.  Other factors to be addressed will be sampling rates, A/D converter characteristics, A/D resolution, windowing, averaging, block size, overlap, radix, line spacing, and a section on uncertainty.)


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