Adam Joseph Lewis

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Adam Joseph Lewis
team feedback
center for environmental studies

• matt bowers
• lauren merski
• robert gaskill

reverberation analysis
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The reverberation in the lobby is dependent on
the location of the sound source, and the
material on the wall.
hypothesis
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Tools
Computer Reverberation software Recording
device Tone software
Testing methods
Calculate the levels of reverberation relative to
the material in the lobby. Materials analyzed
brick, glass, and drywall. Two story space
houses a catwalk that extends into the
atrium. Brick and drywall were tested in the
areas that are in the one story space to test the
reverberation of these two materials.
method
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The red areas indicate the areas where the
reverberation level was tested.
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3
1
4
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5
2
1
Atrium
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Floor plan
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Speaking range (Hz)
220-2200
Hearing range (Hz)
20-20000
Sound absorption coefficients, 1000Hz
Brick, unglazed 0.04 Flooring 0.02 Glass
0.03 Gypsum board 0.03
Live Space-alphalt0.2 Given condition
Given data
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Collected data
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Collected data
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Collected data
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Collected data
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After testing the drywall, brick and glass our
hypothesis proved correct. We also noticed a
relationship between the height of the space, and
the amount of sound reflected by the material.
The tall space, combined with the highly
reflective materials creates an audibly
unacceptable environment when speaking.
Conclusions
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To reduce the amount of reverberation in the
atrium during speaking and dining events, soft
fabrics can be hung on the walls or down into the
space from the ceiling. Light velour fabric
0.17 Medium velour fabric 0.75 Orating from
beneath the catwalk will reduce reverberation, as
the space is half the height of the main atrium,
and contains sound Insulating panels. During
dinner events, tall plants or umbrellas could be
placed around tables to reduce the distance
sound travels before reflecting off a surface.
Recommendations