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DTSTART:20240310T030000
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DTSTAMP:20241028T195453Z
UID:1AE03088-8825-4F23-8301-63DF7C110CFF
DTSTART;TZID=America/New_York:20241025T153000
DTEND;TZID=America/New_York:20241025T170000
DESCRIPTION:[]\n\nThis talk addresses the severe acoustic multi-path enviro
 nment present in typical rooms (generic acoustic volumes)\, theoretical li
 mits for information transfer in those room environments and techniques re
 quired for digital transmission in those environments.\n\nTo answer the qu
 estion on why humans have little difficulty communicating in these challen
 ging acoustic environments\, the talk will provide a primer on room acoust
 ics (e.g.\, critical distance\, impulse responses)\, human hearing (e.g.\,
  loudness\, auditory masking)\, and speech intelligibility (audibility ind
 ex). Shannon bounds for reliable communications in such rooms will be disc
 ussed. The talk will conclude by describing one acoustic ultrasound Discre
 te Sequence Spread Spectrum (DSSS) technique that is widely used today in 
 millions of Cisco\n\nCo-sponsored by: FWCS Life Members Affinity Group\n\n
 Agenda: \nBackground\n\n- Human Hearing Primer\n- Human Hearing Dynamic Ra
 nge and Auditory Masking\n\n- Room Acoustics Primer\n- Direct Sound / Earl
 y and Late Reflections / Impulse Response / Reverberation Metrics\n\n- Spe
 ech Intelligibility / Speech Information Transfer Rates\n- Acoustic Inform
 ation Transfer in Rooms\n- How Room Acoustics Affect Candidate Digital Com
 munications Techniques\n\nDigital Communications\n\n- Spread Spectrum Comm
 unications in Multipath Environments\n- Code Division Multiple Access Exam
 ples (CDMAone and IS-95)\n\n- Shannon Limit for Digital Communications in 
 Multipath Environments (with high delay spread)\n- Can decode in negative 
 SNR - but at low data rates.\n\n- Putting It All Together: Using Discrete 
 Sequence Spread Spectrum (DSSS)\n- An Ultrasound DSSS example\n\n- Implica
 tions for Other Severe Multipath Environments\n\nRoom: ENB 118\, Bldg: Eng
 ineering Building II (ENB2)\, 4220 E Fowler Ave\, Tampa\, Florida\, United
  States\, 33620\, Virtual: https://events.vtools.ieee.org/m/433233
LOCATION:Room: ENB 118\, Bldg: Engineering Building II (ENB2)\, 4220 E Fowl
 er Ave\, Tampa\, Florida\, United States\, 33620\, Virtual: https://events
 .vtools.ieee.org/m/433233
ORGANIZER:mar42@cornell.edu
SEQUENCE:29
SUMMARY:Acoustic Communications in Reverberant Rooms: Why is it easy for hu
 mans\, but challenging for traditional digital communications technologies
 ?
URL;VALUE=URI:https://events.vtools.ieee.org/m/433233
X-ALT-DESC:Description: <br /><p class="MsoNormal"><img style="font-family:
  -apple-system\, BlinkMacSystemFont\, 'Segoe UI'\, Roboto\, Oxygen\, Ubunt
 u\, Cantarell\, 'Open Sans'\, 'Helvetica Neue'\, sans-serif\;" src="https:
 //events.vtools.ieee.org/vtools_ui/media/display/56b9617b-bc22-413a-b8fc-4
 5caf28addf5" alt="" width="447" height="426"></p>\n<p class="MsoNormal">&n
 bsp\;</p>\n<p class="MsoNormal">This talk addresses the severe acoustic mu
 lti-path environment present in typical rooms (generic acoustic volumes)\,
  theoretical limits for information transfer in those room environments an
 d techniques required for digital transmission in those environments.</p>\
 n<p class="MsoNormal">To answer the question on why humans have little dif
 ficulty communicating in these challenging acoustic environments\, the tal
 k will provide a primer on room acoustics (e.g.\, critical distance\, impu
 lse responses)\, human hearing (e.g.\, loudness\, auditory masking)\, and 
 speech intelligibility (audibility index). Shannon bounds for reliable com
 munications in such rooms will be discussed. The talk will conclude by des
 cribing one acoustic ultrasound Discrete Sequence Spread Spectrum (DSSS) t
 echnique that is widely used today in millions of Cisco</p><br /><br />Age
 nda: <br /><p>Background</p>\n<ol>\n<li>Human Hearing Primer\n<ul>\n<li>Hu
 man Hearing Dynamic Range and Auditory Masking</li>\n</ul>\n</li>\n<li>Roo
 m Acoustics Primer\n<ul>\n<li>Direct Sound / Early and Late Reflections / 
 Impulse Response / Reverberation Metrics</li>\n</ul>\n</li>\n<li>Speech In
 telligibility / Speech Information Transfer Rates\n<ul>\n<li>Acoustic Info
 rmation Transfer in Rooms</li>\n<li>How Room Acoustics Affect Candidate Di
 gital Communications Techniques</li>\n</ul>\n</li>\n</ol>\n<p>Digital Comm
 unications</p>\n<ol>\n<li>Spread Spectrum Communications in Multipath Envi
 ronments\n<ul>\n<li>Code Division Multiple Access Examples (CDMAone and IS
 -95)</li>\n</ul>\n</li>\n<li>Shannon Limit for Digital Communications in M
 ultipath Environments (with high delay spread)\n<ul>\n<li>Can decode in ne
 gative SNR - but at low data rates.</li>\n</ul>\n</li>\n<li>Putting It All
  Together: Using Discrete Sequence Spread Spectrum (DSSS)\n<ul>\n<li>An Ul
 trasound DSSS example</li>\n</ul>\n</li>\n<li>Implications for Other Sever
 e Multipath Environments</li>\n</ol>
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