Date post: | 17-Jan-2016 |
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Kurt RobinsonMoussa KanteAlex Gardtner
Movie Theater Noise
The Hearing ProcessComponents of the
earOuter Ear
Pinna Ear Canal
Middle EarEardrumMalleus, Incus, Stapes
Inner EarCochleaCochlear Nerve
The Hearing ProcessEnergy Conversions of
Sound
Acoustical Energy
Mechanical Energy
Hydraulic Energy
Chemical Energy
Electrical Energy
Aims of StudyIdentify noise levels in theatresCompare noise levels to OSHA guidelinesDiscuss with viewers if they were adversely
affected by the noise
Description of TaskPurchased 4 Individual C batteriesSnuck Octave Band Analyzer on the inside
of our coatsSat in multiple sections of the Movie
TheatreHeld the Octave Band Analyzer in our lapsHad the Analyzer on Db(A)Paid close attention to the Analyzer at all
times
Technical EquipmentOctave Band Analyzer
o Features whole and 1/3-octave real-time spectral analysis using digital Butterworth bandpass filters, as recommended by ANSI Standards
o Supports calibrated sound level measurements in whole and 1/3-octave bands, including Lp, Lp_max, Lp_peak, and Leq
o Flat, A, and C frequency weightingo Fast, Slow, and Impulse time weightingo Supports non-acoustic signals with units other
than Pascalso Captures current spectrum for later review
Table G-16 TABLE G-16 - PERMISSIBLE NOISE EXPOSURES (1) ______________________________________________________________ | Duration per day, hours | Sound level dBA slow response ____________________________|_________________________________ | 8...........................| 90 6...........................| 92 4...........................| 95 3...........................| 97 2...........................| 100 1 1/2 ......................| 102 1...........................| 105 1/2 ........................| 110 1/4 or less................| 115 ____________________________|________________________________
Movies
Quantitative FindingsBank Job – Action/Suspense
Peak – 88.7 dBA Mean – 72 – 76 dBA
“21” – DramaPeak – 84.7 dBAMean – 65 – 70 dBA
Qualitative DataSpeaker ArrangementNoise Readings from Multiple AreasInterviews with patronsSeating Arrangement
Types of Seating
IMAX 3D TheaterMuseum of Discovery and Science IMAX 3D
Theater
Several Sound Complaints
Possible Different Speaker Arrangement
Intervention Methods
Not much that can be done.
Speak to a manager.
Call theater company and file a complaint.
SummaryOnly one reading exceeded action level.No readings exceeded exposure limit.Very subjective study
Different theaters by different companiesDifferent policiesDifferent genres of movies
Is this an outdated study?Different time era