Idaho Administrative Code
Title IDAPA 26 - Parks and Recreation, Department of
Rule 26.01.37 - RULES GOVERNING TEST PROCEDURES AND INSTRUMENTS FOR NOISE ABATEMENT OF OFF HIGHWAY VEHICLES
Section 26.01.37.010 - DEFINITIONS
Current through August 31, 2023
As used in this chapter: (3-18-22)
01. All Terrain Vehicle (ATV). Any recreation vehicle with three (3) or more tires, under eight hundred fifty (850) pounds and less than forty-eight (48) inches in width, having a wheelbase of sixty-one (61) inches or less, traveling on low pressure tires, less than ten (10) pounds per square inch (psi). (3-18-22)
02. A-Weighting Scale. A sound filtering system contained in a sound meter which adjusts (weights) the incoming sound energy to approximate human hearing. (3-18-22)
03. Calibrator. A device used to standardize the reading of a sound level meter. (3-18-22)
04. CC. The displacement (size) of an engine in cubic centimeters. The kc's of an engine refers to the piston displacement or engine size. (3-18-22)
05. Db or Decibel. A unit used to measure the amplitude of sounds. As a sound measured in decibels increases, so does its loudness. (3-18-22)
06. Off Highway Vehicle (OHV). Any ATV or motorbike as defined in Section 67-7101, Idaho Code, used off public highways but excluding those vehicles used exclusively on private land for agricultural use or used exclusively for snow removal purposes. These vehicles, together with others not covered by these rules, are sometimes commonly known as off-road vehicles or ORMV's. (3-18-22)
07. Operator. Any person who is in physical control of an OHV. (3-18-22)
08. Red-Line Speed. The lowest numerical engine speed included in the red zone on the OHV tachometer or prescribed by the manufacturer as compiled in the "Off-Highway Motorcycle and ATV Stationary Sound Test Manual" published by the Motorcycle Industry Council, Inc. (3-18-22)
09. Revolutions per Minute (RPM). The number of times the crankshaft of an engine revolves in one (1) minute. (3-18-22)
10. Sound Level Meter. An instrument used for measuring sound levels, which includes a microphone, an amplifier, and meter with frequency weighing networks, such as the A-weighting scale. (3-18-22)
11. Tachometer. A device used to measure RPM of an engine. Tachometers used to obtain sound level measurements may be permanently affixed to the OHV or may be portable units such as hand-held electric, vibrating reed, or inductive tachometers. (3-18-22)
