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Speaker
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David E. Marsh, FASA
Partner + Principal Consultant
David Marsh is a Partner + Principal Consultant at Pelton Marsh Kinsella, LLC, an acoustical, AV and low-voltage consulting firm. He is also a Fellow of the Acoustical Society of America (ASA) and the current President of the National Council of Acoustical Consultants (NCAC). Additionally, Mr. Marsh writes for industry publications, presents technical papers at industry conferences and teaches seminars. Marsh has consulted on such projects as: The Gaylord Palms Resort, Orlando, FL; Atlantis – Paradise Island, Bahamas; Tropicana Hotel/Casino expansion, Atlantic City, NJ; Phantom of the Opera Theatre at The Venetian, Las Vegas, NV; The Eisemann Center for Performing Arts, Richardson, TX; Keene Music Building renovation at Rollins College, Winter Park, FL; 3,500-seat worship center for Crossroads Community Church, Cincinnati, OH; University of Phoenix Stadium (home of the NFL Arizona Cardinals), Phoenix, AZ; Invesco Field at Mile High Stadium (home of the NFL Denver Broncos); Time Warner Cable Arena (home of the NBA Charlotte Bobcats, Charlotte, NC; Ibn Battuta Shopping Mall (longest mall in the world), Dubai, UAE; and several hotel/condo/office office towers in Dubai including Burj Dubai – the tallest building in the world.
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Synopsis
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Learn to engineer successful sound reinforcement systems using a systematic design approach. Attendees will learn:
• The basic principles of acoustics needed for sound reinforcement system design – both outdoors and indoors.
• How to directly calculate the power needed at a loudspeaker’s terminals to achieve a desired sound pressure level (SPL) at a given listener distance.
• How to account for level losses through transformers, over long cable distances or due to sound absorption by air.
• How to design systems that do not “feed back.”
• Concepts for designing successful distributed loudspeaker systems.
• Speech intelligibility concepts and how to predict whether a system in design will have adequate speech intelligibility.
• How to optimize sound coverage from loudspeaker “clusters” using effective pattern control and loudspeaker arraying techniques.
• Some key concepts for setting up and tuning installed sound reinforcement systems.
Participants will receive a course manual and an Excel workbook called “SoundCalcs” (both on CD-ROM). Therefore, attendees should bring their own laptop computers to the seminar (to gain first-hand experience using the “SoundCalcs” spreadsheets). Bringing a laptop is not mandatory, but those who have one will gain more from the experience.
Recommended Prerequisites:
• Two years experience in the industry.
• Ability to do simple algebraic equations (e.g., solving for a single variable)
• Some competency in basic electronics (e.g., Ohms Law)
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