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Directivity of human talkers

National Research Council Canada. Conseil national de recherches Canada. Directivity of human talkers. W.T. Chu, A.C.C. Warnock and J-C. Guy Indoor Environment Program, Acoustics Institute for Research in Construction National Research Council Ottawa, Ontario. Canada.

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Directivity of human talkers

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  1. National Research Council Canada Conseil national de recherches Canada Directivity of human talkers W.T. Chu, A.C.C. Warnock and J-C. Guy Indoor Environment Program, Acoustics Institute for Research in Construction National Research Council Ottawa, Ontario Canada

  2. Project funded in part by Public Works and Government Services of Canada Re-assessment of open-offices including team-style offices Background ASA December 2001

  3. Project: Team style open offices • Orientation of occupants is a factor that can be controlled by orientation of work stations • Need typical levels and directivity to make calculations ASA December 2001

  4. Microphone Array +90º 15º increments -50º ASA December 2001

  5. Almost spherical coverage, 15 13-mm free-field condenser microphones Two synchronized 8-channel digital tape recorders 40 subjects, 20 male, 20 female 30 second Leq for each subject at each angle Measurements and Analysis ASA December 2001

  6. Results - A-weighted ASA December 2001

  7. Moreno et al. Horizontal plane Azimuth, degrees ASA December 2001

  8. Moreno et al. Vertical plane Elevation, degrees ASA December 2001

  9. Dunn and Farnsworth ASA December 2001

  10. McKendree NRC ASA December 2001

  11. Comparison with B&K HTS ASA December 2001

  12. Male versus female - no significant differences French versus English - no significant differences One subject showed changes in spectrum and directivity when speaking with high, normal and low vocal effort. Other factors ASA December 2001

  13. Speech privacy all details considered These data allow detailed calculations to be made if so desired Summary ASA December 2001

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