[Ord. 218, 3/21/2006, § 1]
1.
The following words and phrases, when used in this Part, shall have, unless the context clearly indicates otherwise, the meanings given to them in this Section.
2.
All acoustical terminology shall be interpreted in accordance with that contained in ANSI S1.1, "Acoustical Terminology." All other words and terms not defined herein shall be used with a meaning of standard usage.
3. AMBIENT SOUND PRESSURE LEVEL ANSI BACKGROUND NOISE CONTINUOUS SOUND DECIBEL (dB) EXCESSIVE NOISE IMPULSIVE SOUND NIGHT TIME NOISE NOISE LEVEL NOISE POLLUTION NORMAL AGRICULTURAL OPERATION PERIOD OF OBSERVATION PERSON PURE TONE SOUND LEVEL (UNWEIGHTED SOUND PRESSURE LEVEL) SOUND LEVEL METER SOUND PRESSURE LEVEL TOWNSHIP VEHICLE
Specific Definitions.
The all-encompassing background sound pressure levels associated with a given environment at a specified time, without the sound contribution of the specific source in question. Ambient noise is usually a composite of sounds from near and far sources, none of which is particularly dominant.
American National Standards Institute or its successors.
The total noise from all sources other than a particular sound that is of interest (i.e., other than the sound being measured).
Any sound which is in a steady, fluctuating or intermittent state of prolonged duration.
A unit of level which denotes the ratio between two quantities that are proportional to power; the number of decibels is 10 times the common logarithm of this ratio. One decibel is 1/10 of a bel.
Excessive noise is sound that: (1) is injurious or unreasonably interferes with the comfortable enjoyment of life and property. Measured noise levels in excess of limits established in these regulations or those specified in valid permits are declared to be excessive noise; (2) is annoying to a person of ordinary auditory sensibilities.
Any sound of short duration (less than one second), with an abrupt onset and rapid decay (including metal-to-metal impacts or exploding impacts) separated in time by at least one second.
10:00 p.m. to 7:00 a.m., prevailing time, conversely, Day Time- 7:00 a.m. to 10:00 p.m., prevailing time.
Any sound which annoys or disturbs humans of normal auditory sensitivity or which causes or tends to cause an adverse psychological or physiological effect on humans of normal auditory sensitivity, excluding all aspects of noise regulated by the Federal Occupational Safety and Health Act.
Same as sound level but usually used to describe unwanted sound.
Noise of such loudness and character from a single source or from multiple sources, which is or may be predicted with reasonable certainty to be, injurious to health or which unreasonably interferes with the enjoyment of property or with any lawful business or activity. Noise/sound pressure levels exceeding those permitted in any district shall constitute noise pollution.
The customary and generally accepted activities, practices and procedures that farmers adopt, use or engage in year after year in the production and preparation for market of poultry, livestock and their products, and in the production and harvesting of agricultural, agronomic, horticultural, silvicultural and aquacultural crops and commodities.
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.
Includes an individual, firm, association, organization, partnership, trust, company, corporation or any other similar entity.
A sound that can be distinctly heard as a single pitch or a set of single pitches. For the purposes of this Part, a pure tone shall exist if the 1/3 octave band sound pressure level in the band with the tone exceeds the arithmetic average of the sound pressure levels of the two contiguous 1/3 octave bands by 15 dB for bands with center frequencies less than 160 Hz, by 8 dB for bands with center frequencies of 160 Hz to 400 Hz, and by five dB for bands with center frequencies greater than 400 Hz.
20 times the common logarithm of the ratio of a given sound pressure (obtained with a standardized frequency weighting, with standard exponentially weighted time averaging) to the reference sound pressure of 20 micropascals. Time and frequency weightings employed should be specified; if not specified, fast time- and A- frequency-weightings are understood. Unit symbol: dB.
Instrument or combination of instruments used for the measurement of sound level, with a standard frequency-weighting and standard exponentially weighted time-averaging, which meets or exceeds the requirements for an ANSI Type S1A or Type S2A Sound Level Meter.
In air, 20 times the common logarithm of the ratio of the given sound pressure to the reference sound pressure of 20 micropascals. Unit symbol: dB.
East Rockhill Township, Bucks County, Pennsylvania, its Board of Supervisors, Township Manager, and all employees and appointees of the Township.
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, farm machinery, industrial machinery, highway graders, tractor-trailers, and semi-trailers.