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An Acoustical Study of the Salt Lake Tabernacle

An Acoustical Study of the Salt Lake Tabernacle. Sarah Rollins Timothy W. Leishman. 147 th Meeting of the Acoustical Society of America May 25, 2004. Acoustics Research Group Department of Physics and Astronomy Brigham Young University. Overview. Background Measurements Results

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An Acoustical Study of the Salt Lake Tabernacle

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  1. An Acoustical Study of the Salt Lake Tabernacle Sarah Rollins Timothy W. Leishman 147th Meeting of the Acoustical Society of America May 25, 2004 Acoustics Research Group Department of Physics and Astronomy Brigham Young University

  2. Overview • Background • Measurements • Results • Conclusions • Further Work

  3. Motivations • Characterize the acoustics • Modern equipment and techniques • Benchmark measurements • Spatial variation of parameters • Hall geometry • Spatial statistics

  4. Measurements • Sources • Dodecahedron loudspeaker • Sound reinforcement system • Receivers • Omnidirectional microphone • Multi-pattern microphone • KEMAR • Measurements • Maximum Length Sequence

  5. Source Positions

  6. Early Decay Time Average: 4.10 Std: 0.68

  7. Clarity Factor (C80) Average: - 4.52 Std: 2.92

  8. Dietsch Echo Criterion for Music Average: 1.00 Std: 0.29

  9. Lateral Fraction Average: 0.17 Std: 0.09

  10. Binaural Quality Index Average: 0.59 Std: 0.18

  11. Statistics

  12. Conclusions • Hall geometry affects parameters • Values show focusing effects • EDT, C80 more uniform over main floor than in the balcony • Higher LF in the very center of the room

  13. Further Work • Processing • More detailed statistics • Computer Modeling (CATT, EASE) • Current acoustics • Historical acoustics • No Balcony • No Choir Loft • Smaller Organ Case • Pine Trees

  14. Acknowledgements • Timothy W. Leishman • BYU Acoustics Research Group

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