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Architectural Acoustics: How Theatre Design Influences Sound

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Bridgette cooke

on 4 November 2013

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Transcript of Architectural Acoustics: How Theatre Design Influences Sound

Architectural Acoustics:How Theater Design Influences Sound Waves.
Bridgette Cooke

Introduction
Theaters and music halls are designed to increase intensity of the sound waves that reach the audience.
Reverberation Time
a measure of the acoustic properties of a room, equal to the time taken for a sound to fall in intensity by 60 decibels. It is usually measured in seconds
Conclusion
Theaters are designed to reflect the sounds coming from the stage, increase the amount of waves that hit the audience, and absorb any excess sound.
Theater Design
Theaters are designed to have short reverberation time.
The less sound waves hit objects the longer it lasts.
Objects absorbing sound
The audience absorbs sound waves and can effect the quality of sound.
To prevent the people from absorbing the sound the seats are on a steep angle to create a clear path between the stage and the audience member.
Materials
Soft materials, like fabric or carpets, absorb sound while materials like limestone reflect it and increase what can be heard.
Ancient Greek theaters design and material use blocked out all low-frequency sounds like murmuring or wind.
Higher frequency sounds like the actors voices could be heard up to 60 meters away.
Sources
http://www.nature.com/news/2007/070319/full/news070319-16.html
https://courses.physics.illinois.edu/phys193/Student_Reports/Fall03/Lisa_Egner/Architectural_Acoustics_Lisa_Egner.pdf
http://www.google.com/url?q=http%3A%2F%2Fen.wikipedia.org%2Fwiki%2FArchitectural_acoustics%23Interior_space_acoustics&sa=D&sntz=1&usg=AFQjCNEqGNabf5wHYqCdaXLNunTy6SB_JQ
http://hyperphysics.phy-astr.gsu.edu/hbase/acoustic/revtim.html
http://www.concerthalls.unomaha.edu/
http://www.nature.com/news/2007/070319/full/news070319-16.html
http://sound-prospects.com/building-design-for-sound-and-acoustics-part-5-overview-of-sound-control/
Absorbing: Absorbing excess sound waves to remove unnecessary sounds
Reflection: Using Reflective surfaces like concrete or wood to reflect sound waves.
Ways to Improve Audio Quality
Full transcript