All acoustical terminology shall be that contained in ANSI S1.1 “Acoustical Terminology”.
ANSI. American National Standards Institute or its successors.
APPLIANCE. Any device or combination of devices used or capable of being used as a means of accomplishing a desired end, such as a window air conditioning unit.
DAY. The 24-hour period starting at local midnight.
DAYTIME. 5:00 a.m. to 6:00 p.m.
DECIBEL (dB). A unit of sound level which is a division of logarithmic scale used to express the ratio of the sound intensity of the source to the intensity of an arbitrarily chosen reference intensity. The ratio is expressed on the decibel scale by multiplying its base ten logarithm by ten.
EQUIPMENT. Any devices or combination of devices to accomplish a desired end, such as a chain saw, bulldozer and the like.
EXCESSIVE NOISE. That sound which is injurious or which unreasonably interferes with the comfortable enjoyment of life and property, or annoying to a person of ordinary sensibilities. Measured noise levels in excess of limits established in these regulations or those specified in valid permits are declared to be EXCESSIVE NOISE.
FLUCTUATING NOISE. A noise whose sound level varies significantly with time.
IMPULSIVE NOISE. Characterized by brief excursions of sound level. The duration of a single impulse is usually less than one second.
INTERMITTENT NOISE. A noise whose sound level exceeds the ambient noise levels at least twice during the period of observation, which is one minute or more. The period of time during which the level of the noise remains at an essentially constant value different from that of the ambient is on the order of one second or more.
NOISE. Any sound emitted by a person, animal, vehicle, appliance, equipment or other device and its environmental interaction.
ORDINANCE ENFORCEMENT OFFICER. Any person appointed by the township with responsibility to enforce municipal ordinances or any sworn member of the Township Police Department.
PERSON. Either the owner or operator of vehicles, appliances, equipment or devices.
PERIOD OF OBSERVATION. The time interval during which acoustical data are obtained. The PERIOD OF OBSERVATION is determined by the characteristics of the noise being measured and the instrumentation being used. The PERIOD OF OBSERVATION must be at least as long as the response time of the instrumentation. The greater the variance in individual sound level, the longer must be the observation time for a given expected accuracy of measurement.
S.A.E. Society of Automotive Engineers.
SOUND LEVEL (NOISE LEVEL). Airborne sound levels are expressed in dB and obtained by the use of specific frequency dependent weighting networks, as specified in the referenced standards. The specific weighting network used must be indicated by the proper notation. If the A-weighting is employed, the SOUND LEVEL is identified as dB(A).
SOUND LEVEL METER. An instrument, or combination of instruments, which meets or exceeds the requirements for an ANSI Type S1A or Type S2A Sound Level Meter.
STEADY NOISE. A noise whose level remains essentially constant (i.e., fluctuations are less than five dB) during the period of observation is a steady noise.
VEHICLE. Any device, or combination of devices, used for or capable of being used for transporting persons or property. VEHICLES include, but are not limited to, the following: automobiles; trucks; buses; motorcycles; motorized bicycles; snowmobiles; scooters; all-terrain vehicles; go-carts, racers and like devices; farm machinery; industrial machinery; highway graders; trailers, graders and semi-trailers.
(Ord. 1969-2, passed 5-26-1969; Ord. 1989-1, passed 3-13-1989)