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Project Leader
Peter Hanes
Phone: 613-998-1282
Fax: 613-952-1394
Email: Peter.Hanes@nrc-cnrc.gc.ca
Acoustic Transfer Impedence For Pressure Reciprocity Calibration
The primary calibration of laboratory standard microphones using the pressure reciprocity technique is critically dependent on the determination of the acoustic transfer impedance of pairs of coupled microphones. The acoustic transfer impedance depends on the electromechanical properties of the microphones and the distribution of the sound pressure in the cavity that couples the microphones. Various improvements to the existing standardized model for the distribution of sound pressure are being investigated for their suitability.
Application areas and stakeholder requirements for research results include sound level measurement for hearing and other health effects, transducers for telecommunications and entertainment industries, performance of road, rail and air transportation, performance of materials and buildings for construction industry, and machinery monitoring and diagnostics.
