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remote controlled airplane, boat, or other vehicle powered by an engine or motor,the <br /> operation of which causes noise, unless the noise from the blower or fan is muffled and <br /> such engine or compressor is equipped with a muffler device sufficient to deaden and <br /> effectively prevent such noise so that the noise shall not annoy, disturb or affect the <br /> comfortable enjoyment of life or property. <br /> a. Sound levels. No person shall operate or cause or permit to be operated any source <br /> of noise in such a manner as to create a noise level exceeding the limit set in <br /> Table 1. <br /> TABLE 1 <br /> 7:00 A.M. — 10:00 P.M. 10:00 P.M.—7:00 A.M. <br /> Land Use L50 L10 L50 L10 <br /> Residential 60 65 50 55 <br /> Commercial 65 70 65 70 <br /> Industrial 75 80 75 80 <br /> b. Measurement procedure. The following procedures must be used to obtain a <br /> representative sound level measurement by the use of a sound measuring device: <br /> 1. A decibel meter will be used to obtain readings and be used as evidence. <br /> 2. The operator of the device has sufficient training to properly operate the <br /> equipment and can testify as to the manner in which the device was set up <br /> and operated. <br /> 3. The device is operated with minimal distortion or interference from outside <br /> sources; and has been certified as being accurate and reliable. <br /> 4. Measurements must be made at least three feet off the ground or surface and <br /> away from natural or artificial structures which would prevent an accurate <br /> measurement. <br /> 5. Measurements must be made using an A-weighting and fast response <br /> characteristics of the sound measuring device as specified in American <br /> National Standards Institute S1.4-1983. <br /> 6. Measurements must not be made in sustained winds or in precipitation which <br /> results in a difference of less than ten decibels between the background noise <br /> level and the noise source being measured. <br /> 7. Measurements must be made using a microphone which is protected from <br /> ambient conditions which would prevent an accurate measurement. <br /> 8. Measurement must be made from the property of the person making the <br /> complaint, when applicable. <br /> (33) Tracks and trails for riding motor vehicles are not allowed in a residential area unless <br /> said track or trail is: <br /> a. 1,000 feet from any residence except that of the owner; and <br /> Ordinance 22-07 <br /> Page 4 of 5 <br />