Event Details

Digital Signal Processing Techniques Applied in Acoustical Standards at National Research Council

Presenter: Dr. Lixue Wu - Scientist at National Research Council, Acoustic Standards Laboratory, Ottawa.
Supervisor:

Date: Thu, July 15, 2004
Time: 14:00:00 - 15:00:00
Place: EOW 430

ABSTRACT

Outline:

The following topics will be discussed:

  • Acoustical Standards Program at NRC
    Three main functions, personnel and international comparisons
  • Digital Signal Processing (DSP) and Its Use in Metrology
    Historical review, current status and future challenges
  • DSP Techniques Applied in Acoustical Standards
    Linear prediction in automated sound level meter calibration, noise reduction in sound calibrator calibration and adaptive noise cancellation in reciprocity microphone calibration
  • DSP Techniques Applied in Vibration Standards
    Time series capture and LMS fit in method 1 of primary vibration
    Calibration, model based minimum point search in method 2 of primary vibration calibration and quadrature sampling in method 3 of primary vibration calibration
  • DSP Techniques Applied in Ultrasound Standards
    Modeling of unknown random process in very low ultrasonic power calibration
  • Future Work Using DSP at NRC
    Primary shock calibration and rocking acceleration measurement
  • Conclusions

Education:

Dr. Lixue Wu received a Ph.D. (1992) in electrical engineering and an M.A.Sc. (1989) in electrical engineering from the University of Victoria. He completed a B.Sc. in physics (1982) and M.Sc. coursework (1984) in physics at East China Normal University.

Expertise:

Underwater acoustics, underwater acoustic systems, transducers and arrays, fisheries acoustics, acoustical standards and measurements, acoustical instrumentation and calibration, ultrasonics, vibration and measurements, noise control, statistical and digital signal Processing and data compression.

For further information, please contact: Dr. Adam Zielinski (721-8622)