Sound Reflectors and the Projection of Sound
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Sound Reflectors and the Projection of SoundKaegan Gregory
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Overview of Prior Research• Every concert hall is unbalanced• Acoustic engineers adjust acoustics in
concert hallso Sound shellso Sound Reflectors
• RCHS auditorium adjusted with sound reflectors• Tested low, middle, and high
frequencies
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Procedure• Test acoustics
o Low medium high frequencieso 9 points in auditorium
• Develop wooden sound reflectorso test, and revise positions
• Develop plastic sound reflectorso test, revise positions
• Analyze datao Standard deviation of low medium high
frequencies, this value is then plugged into ANOVA
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Data: Control• Auditorium proved to be unbalanced• Seemingly random data• Odd acoustic trend• Average decibel level: 74.9 (average
throughout auditorium)• Data was expected
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• Position of 1st wooden reflectors
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Data: Wooden Reflector (pos. 1)• Balance improved
o Still abnormalities in hot spots in auditorium, requiring further adjustment
• Data makes sense based on angles • Projected sound throughout auditorium• Average decibel level: 78
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• Graph of standard deviation of trials between left, center, and right
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• Position of 2nd wooden reflectors
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Data: Wooden Reflector (pos. 2)• Balance further improved• Angles of reflection adjusted • Average decibel level: 77.5
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• Graph of standard deviation of trials between left, center, and right
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• Position of plastic reflectors
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Data: Plastic Reflector • Balance improved to a standard
deviation of 1.36 (60% improvement from original)• Average decibel level: 76
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• Graph of standard deviation of trials between left, center, and right
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Analysis• When all trials are compared, no
significant differences. (p=.071)• When control was compared to any
trial, there were significant differences (p=.011)o Shows that adjustments caused sound to be
reflected almost certainly not by chance
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What Does This Mean??• The sound reflectors proved to be a
practical solution for the RCHS auditoriumo Hot spots nearly eliminatedo more sound projectedo Materials fairly inexpensive
• Implementationo Beta testing (band/chorus)o Design improvemento Scaled enlargemento Suspension?
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Music• Associate principal
flute ASYO• Associate principal
flute ESYO • 4th flute AYWS• 7th chair Allstate
band
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Honors • Governor’s Honors
Program (flute/dance)o Music Theory Classeso History of Music classeso Solo and orchestral
performanceso Choreography techniqueso Modern, Jazz, MOJA, and
Ballet
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Movement• Founding member of Omni Free
Runningo Flowo Parkouro Trickingo Free Runningo Tumbling