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                 BioSignetics Corporation
                                                                    Digital Stethoscope Company                             

NVH Discovery Tool


BSIGNAL NVH Version 3.5: Dynamic and Machine Health Monitoring
for Noise, Vibration and Harshness Testing

Advanced Engineering, Noise Vibration and Harshness NVH
and Aerospace Applications
Price: $15,000.
Annual single-seat license: $5,000; Annual Academic License: $2,500
To purchase please contact Biosignetics at

Application Presentation: NVH Advanced DIscovery Tool.pdf

Papers: Gear Fault Detection with Time-Frequency Based Parameter
                Polyshchuk V, Choy F, Braun, M. Int. Journal of Rotating Machinery, 2002
                Polyshchuk, V., Choy, F.K., Braun, M.J. “New Gear-Fault-Detection parameter
                by Use of Joint Time-Frequency Distribution”, AIAA Journal Of Propulsion and
                Power, Vol. 15, No. 5, 1999.


Processing JTFA up to 150,000 points in 1GB of RAM

Hardware:   PC-based Windows NT, 2000, XP, XP Home computer
Analysis Methods: Time Signal, History, Signature
Discrete Fourier Transform (DFT)  Fast Fourier Transform (FFT) 
Auto Power Spectrum   Hilbert Transform Hartley Transform
Joint Time-Frequency Analysis with Pseudo Wigner-Ville Distribution (PWVD)   
Other Transforms (optional): Short-Term Fourier Transform (STFT),
S-Transform, Continuous Wavelet Transform (CWT), Choi-Willams Distribution,
Margenau-Hill Distribution (MHD), Real Wigner-Ville Distribution (WVD),
Window Functions: Uniform, Hanning, Hamming, Flat Top, Low Sidelobe,
Blackman-Harris, Exact Blackman,
Four Term Blackman-Harris, Seven Term Blackman-Harris
 Statistical and Diagnostic Signal Indicators:
Peak-to-Peak, RMS, Skew, Kurtosis, Crest Factor,
Normalized K-Factor, Normalized Energy, NP4
Signal Residual Analysis (Peak FFT Spectrum Removal)
Filters: Ideal Filter, Butterworth, Chebyshev-I, Inverse Chebyshev (Chebyshev-II), Bessel, Elliptic (Cauer)
Types: Lowpass, Highpass, Bandstop, Bandpass
Ripple Limits Selection
Noise Reduction: PolyShrink, VisuShrink, SureShrink using Soft and Hard
thresholds with wavelets,
 Daubechies up to 18th order, Coiflet up to 30rd order,
Symmlet up to 30rd order
Report Generation in MS Word




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Copyright: 2004-2009 BioSignetics Corporation
Last modified: 02/02/09