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Measuring noise and its impact is a very sophisti- <br />cated and often controversial task. The noise <br />levels associated with a general aviation airport <br />are often quite variable and may range from <br />occasional annoyance to persons living near the <br />airport, to outright complaints relating to air- <br />craft noise. The range of perceived noise levels <br />depends basically on three factors: 1) the type of <br />aircraft operating at the airport; 2) the number <br />of operations that occur over a certain period of <br />time; and 3) the time of day the operations occur. <br />The noise levels associated with the forecast <br />activity and mix of aircraft at Gateway is <br />expected to fall well within acceptable noise <br />levels. The actual perception of noise, however, <br />and thus the response varies for each individual. <br />The public commented on the present noise level at <br />the first public meeting on May 16, 1984. No <br />comments were expressed on noise at the second <br />public meeting held on August 22, 1984. Two (2) <br />residents expressed concern over the noise <br />generated by twin engine aircraft. They also <br />were concerned about electrical disturbances <br />created by aircraft in the approaching area. The <br />electrical disturbance was primarily limited to <br />television interference. <br />Noise generated by highway traffic and manufac- <br />turing in the area is also a concern. The airport <br />is surrounded on all sides by arterial highways. <br />The county roads and U.S. 10 carry both car and <br />truck traffic. United States Highway 10 is a <br />major corridor of traffic in the state. Both <br />County Road 56 and 57 carry north -south traffic to <br />and from the City of Ramsey. C.R. 116 presently <br />has the lowest traffic volume of the four highways <br />mentioned here. Ambient noise level and intensity <br />are high near these traffic areas. <br />8-2 <br />