511.01  DEFINITIONS.
   (a)   For the purpose of this chapter, whenever any of the following words, terms or definitions are used herein, they shall have the meaning ascribed to them in this section:
      (1)   Acoustical Terminology, Definitions of:  All acoustical terminology shall be that contained in ANSI S1.1 “Acoustical Terminology”.
      (2)   “Ambient” means the all-encompassing sound associated with a given environment without the noise source of interest.
      (3)   “ANSI”  means Amerian National Standards Institute or its successor bodies.
      (4)   “ARI”  means Air-Conditioning and Refrigeration Institute or its successor bodies.
      (5)   “ASHRAE” means American Society of Heating, Refrigerating and Air- Conditioning Engineers or its successor bodies.
      (6)   “ASTM” means American Society for Testing Materials or its successor bodies.
      (7)   “Decibel” means a unit for measuring the volume of a sound, equal to the logarithm of the ration of the intensity of the sound to the intensity of an arbitrarily chosen standard sound; abbreviated “dB”.
      (8)   “Director” means the Director of Public Service and Safety.
      (9)   “Discrete tone” means a sound wave whose instantaneous sound pressure varies essentially as a simple sinusoidal function of the time.
      (10)   “Fluctuating noise” means a noise whose sound pressure level varies significantly but does not equal the ambient environmental level more than once during the period of observation.
      (11)   “Intermittent noise” means a noise whose sound pressure level equals the ambient environmental level two or more times during the period of observation.  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.
      (12)   “IEC” means International Electrotechnical Commission or its successor bodies.
      (13)   “ISO” means International Organization for Standardization or its successor bodies.  (Ord.  103-82.  Passed 9-7-82.)
      (14)   “Vehicle” means a vehicle as defined in Ohio Revised Code Section 4501.01(A).
      (15)   “Motor vehicle” means a vehicle as defined in Ohio Revised Code Section 4501.01(B).  (Ord.  177-02.  Passed 10-21-02.)
      (16)   “Nonsteady noise” means a noise whose level shifts significantly during the period of observation.
      (17)   “Period of observation” means the time interval during which acoustical data are obtained.  The period of observation is determined by the characteristics of the noise being measured and should also be at least ten times as long as the response time of the instrumentation.  The greater the variance in indicated sound level, the longer must be the observation time for a given expected accuracy of the measurement.
      (18)   “Person” includes all natural and artificial persons, including but not limited to partners, servants, principals, agents, employees, public or private officials, associations, societies, clubs, firms, partnerships, and all bodies politic or corporate.
      (19)   “SAE” means Society of Automotive Engineers or its successor bodies.
      (20)   “Sound level (noise level)” means, for air-borne sound, a weighted sound pressure level, obtained by the use of metering characteristics and the A- weighting as specified in the reference standards (ANSI).  When the A- weighting is employed, it must be indicated.
      (21)   “Sound pressure level” means, in decibels, a sound is twenty times the logarithm to the base ten of the ratio of the pressure of the sound to the reference sound pressure.  Unless otherwise specified, the effective (rms) pressure is to be understood.  The reference sound pressure is 20 uN/m2.
      (22)   “Steady noise” means a noise whose level remains essentially constant (i.e., fluctuations are negligibly small) during the period of observation is a steady noise.
      (23)   “Zoning District” means those districts established by the Lorain Zoning Regulations in Part Eleven.
         (Ord. 103-82.  Passed 9-7-82.)