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MAY 24 '96 14:45 FROM DRUID BRASLAU ASSOC PAGE.006 <br />• Noise levels from activities within bubble <br />The bubble material is more transparent to sound than normal construction. Therefore, sound <br />from activities within the bubble should be minimized. No amplified sound should be used <br />within the bubble. Normal sounds will be slightly enhanced within bubble (+ 3 to 5 dB) <br />because it is an enclosed space. Based upon the weight of the bubble material, an attenuation <br />of 10 to 15 dB at typical speech frequencies can be expected. Therefore, sounds from within <br />the bubble should be somewhat lower than from the same location but without the bubble. <br />.• s <br />The north/south orientation of the athletic field is preferred over the east/west orientation <br />since: <br />Bleachers may provide less shielding of fan noise when oriented east/west <br />Pole- mounted speakers cannot be as well-shielded from homes <br />Some trees will have to be removed <br />RECEIVED <br />JUN .092003 <br />CITY OF LINO LAKES <br />Academy of the Holy Angeb - Noise Assessment <br />Page 4 <br />