Acoustical Presentation

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Acoustical Presentation

• Auditorium
• Adam Joseph Lewis Center
• Oberlin, Ohio
• Adam P. OBrien

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Hypothesis

• Natural Based Materials can be used to simulate ,
  and or duplicate the acoustical properties of
  current materials used in sound absorption, and
  transmission.
• Can be determined by testing for reverberation
• Using Green Materials will help with the
  buildings overall environmental attitude.

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Tools Used

• Digital Voice Recorder
• Courtesy of Adil Sharag-Eldin
• Ecotect Version 5.2
• Full Registered Version
• Courtesy of Computer Resources

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Progress

• Hypothesis Proven
• 3-d Model completed
• Imported to Ecotect V.5.20
• Portion Completed
• Phoned William McDonough for acoustical
  contacts
• Received Acoustical Information

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Photos of Auditorium
Auditorium Located in Oberlin, ET.III Visited
and Presented in this auditorium
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Circular Distribution of Sound
Source (500 Hz Speaker)
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Linear Distribution (One Point)
Source (500 Hz Speaker)
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360? Sound Source
Source (500 Hz Speaker)
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Testing Locations
Nine Locations Tested with Pulse Tones Locations
Tested within Ecotect, and through Physical Sound
Recorder
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Test Frequencies

• 125 Hz
• 250 Hz
• 500 Hz
• 1000 Hz
• 2000 Hz
• 4000 Hz
• 8000 Hz

Due to Computer and Software Limitations only 125
Hz through 2000 Hz Were available for testing,
although all sounds were produced and recorded.
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Spectrogram 9.2
Looks Cool, but causes lots of Problems
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More Gram 9.2
Showing numerous Frequencies, unfortunately some
at the same time
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Using Gram 9 to Discover a Deviation Factor to
Improve Data
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Graphic Results
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Results

• According to Computer Generated Results, the
  hypothesis was proven true
• According to Physical testing the Hypothesis is
  Half True, and therefore proven incorrect.
• After consulting Prof. Adil, the decision was
  made that the hypothesis is true, due to the fact
  the inaccuracy was located within the thousandths
  of a second, and testing materials used were not
  high performance

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What did I learn?

• Acoustics is not simple
• Many factors go into creating acousitcal systems,
  that both function and provide adequate
  performance.
• ECOTECT
• The Program is wonderful
• People really are nice if you ask nicely!