Testing of health canada's acoustic chamber at the consumer and clinical radiation protection bureau based on ISO standard 3745: 2003

Authors

  • Jason T. Tsang Healthy Environments and Consumer Safety Branch, Product Safety Directorate, Consumer and Clinical Radiation Protection Bureau, Acoustics Division, 775 Brookfield Road, Ottawa, ON K1A 1C1, Canada
  • Stephen E. Keith Healthy Environments and Consumer Safety Branch, Product Safety Directorate, Consumer and Clinical Radiation Protection Bureau, Acoustics Division, 775 Brookfield Road, Ottawa, ON K1A 1C1, Canada
  • William J. Gastmeier HGC Engineering, 2000 Argentia Road, Plaza 1, Mississauga, ON L5N 1P7, Canada

Keywords:

Acoustics, Electric breakdown, Electroacoustic transducers, Microphones, Radiation shielding, Tropical engineering, Acoustic chambers, And models, Directivity effects, Dynamic loudspeakers, Higher frequencies, ISO standards, Octave bands, Ontario, Pure tones, Signal to noises, Sound level meters, Sound sources, Third parties

Abstract

Third party acoustical certification testing was performed in Health Canada's acoustic chamber at the Consumer and Clinical Radiation Protection Bureau in Ottawa, Ontario. Tests were made using the pure tone method prescribed in Annex A of ISO 3745 (2003) and the results of the free fold performance testing were discussed. Measurements were conducted with a Gras Model 40 BE 1/4 inch microphone and Model 26CB preamplifier connected to a Bruel & Kjaer Type 2260 Precision Integrating Sound level Meter. Sound traverses were performed using pure-tome signals at 1/3 octave band center frequencies and the microphone was moved at 10 cm intervals. The results show that the dynamic loudspeaker directivity effects are more prevalent at the higher frequencies above 2 kHz. The two sound sources are found to be in accordance with the directionality and signal to noise requirements of ISO 3745.

Published

2008-09-01

How to Cite

1.
Tsang JT, Keith SE, Gastmeier WJ. Testing of health canada’s acoustic chamber at the consumer and clinical radiation protection bureau based on ISO standard 3745: 2003. Canadian Acoustics [Internet]. 2008Sep.1 [cited 2021Apr.13];36(3):92-3. Available from: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/2053

Issue

Section

Proceedings of the Acoustics Week in Canada

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