The effect of Position to Sound Source on the Intensity of different Frequencies in Swarthout...
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The effect of Position to Sound Source on the Intensity of different Frequencies in Swarthout Recital Hall FINDING THE ACOUSTIC SWEET SPOT Ann Gorsuch University of Kansas, Mathematics Collaborators: h Legresley, Kip Haaheim, Brad Williamson, Steve Obenhaus, Andrew Ja
The effect of Position to Sound Source on the Intensity of different Frequencies in Swarthout Recital Hall FINDING THE ACOUSTIC SWEET SPOT Ann Gorsuch
The effect of Position to Sound Source on the Intensity of
different Frequencies in Swarthout Recital Hall FINDING THE
ACOUSTIC SWEET SPOT Ann Gorsuch University of Kansas, Mathematics
Collaborators: Sarah Legresley, Kip Haaheim, Brad Williamson, Steve
Obenhaus, Andrew Jackson
Slide 3
HTTP://WWW.YOUTUBE.COM/WATCH?V=SVYJE3L57ZY What is the acoustic
sweet spot? Its a magical place where: -all frequencies are
balanced. -the volume is ideal Dealing with THREE variables:
frequency, volume, and spot (location)
Slide 4
BIG QUESTION: How do FREQUENCY, POSITION, and VOLUME relate in
the concert venue setting?
Slide 5
QUESTIONS AND OBJECTIVES 1.Is the hall symmetric? 2.How does
angle affect sound intensity? 3.How does angle affect certain
frequencies? Find the acoustical sweet spots.
Slide 6
METHODS
Slide 7
WENT TO SWARTHOUT
Slide 8
TOOK MEASUREMENTS WITH A DECIBEL READER AT EACH FOOT ON 5
DIFFERENT ANGLES
Slide 9
USING A METRONOME, A LONG RANGER, AND MY FRIEND ANDY
Slide 10
LAYOUT
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RESULTS
Slide 12
VISUALS: CONTOUR MAP Low FrequencyMid FrequencyHigh Frequency
100 95 90 85 80 75 70 65 60 55 50 108 100 96 92 88 84 80 76 72 68
64 117 112 107 102 97 92 87 82 77 72 67 Notice the maximum dB for
each f
Slide 13
VISUAL: POINTS Low Frequency Mid Frequency High Frequency
LIGHTER is LOUDER The darker the blue, the quieter the sound
Slide 14
RESULTS 1. The hall is symmetric. Paired t-test
Slide 15
2. HOW DOES ANGLE AFFECT SOUND INTENSITY? Outside 30 degrees
there was a significant difference in the intensity of sound
compared to the center reading in all frequencies. From the
visuals: There was more variance in the front and sides than the
back stage* -back stage= consistently worse -front = inconsistent
but better Directly back stage (180 degrees) differs less than 90
and 135 degrees. SAFE ZONE
Slide 16
Low frequencies dissipate slower in all directions. Mid
frequencies start to fail on the sides. High frequencies dissipate
quickly in all directions Especially directly behind. 3. HOW DOES
ANGLE AFFECT CERTAIN FREQUENCIES? LOW MID HIGH MID HIGH
Slide 17
Slide 18
DISCUSSION -Sweet spots seem random. -Possible Error: Accuracy
of the reader and my measuring string -Would results be different
for a different venue? -Create a model?