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Speech Levels in Open Offices

National Research Council Canada. Conseil national de recherches Canada. Speech Levels in Open Offices. Alf Warnock & W.T. Chu Indoor Environment Program, Acoustics Institute for Research in Construction National Research Council Ottawa, Ontario. Canada. Project: Team style open offices.

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Speech Levels in Open Offices

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  1. National Research Council Canada Conseil national de recherches Canada Speech Levels in Open Offices Alf Warnock & W.T. Chu Indoor Environment Program, Acoustics Institute for Research in Construction National Research Council Ottawa, Ontario Canada

  2. Project: Team style open offices • Can some degree of speech privacy be attained? • Need typical levels to make calculations ASA December 2001

  3. Team-style areas - real ASA December 2001

  4. Previous Work • Pearsons, Bennet & Fidell • Different voice efforts measured but none in open office • McKendree • Anechoic room • No information on speech levels measured in open offices ASA December 2001

  5. Recording Voice Levels ASA December 2001

  6. Sites and subjects • Nine offices - mix of team- and cubicle-style • 118 subjects, 53 male, 65 female • Also measured attenuations between work stations ASA December 2001

  7. Analysis • 30 second segments with no prolonged silences. • 1/16 second integration time - 480 spectra • Levels corrected to distance of 0.9 m by measurements in an anechoic chamber ASA December 2001

  8. Attenuation ASA December 2001

  9. Result for one subject L1 L10 L50 Leq L90 ASA December 2001

  10. Average for each office - Males ASA December 2001

  11. Grand Average - Males 51.0 ± 3 dBA ASA December 2001

  12. Grand Average - Females 49.7 ± 3.8 dBA ASA December 2001

  13. Voice Spectra ASA December 2001

  14. Casual vs. Open Office ASA December 2001

  15. Average Voice Levels ASA December 2001

  16. SII and voice level Measured attenuations Same noise spectrum Different voice levels ASA December 2001

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