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Rutgers Noise Technical Assistance Center  

Octave Band Analysis

Many jurisdictions set permissible sound level limits in octave bands in their code, in addition to the limits set on the A-scale (dBA). New Jersey is one of those jurisdictions. While no certification is required for an officer to conduct octave band analysis, beyond the basic certification course Community Noise Enforcement, it is a more involved measurement method. Several years ago we developed this course at the request of the enforcement community, and it is now offered annually. Completion of the certification course is a prerequisite for this course.



The Fundamentals of Sound (Review)
          Units of Measurement and Reporting     
          Units of Measurement and Reporting
          Range of Human Hearing
          Most Annoying Frequencies
          Relative Response to Frequencies, and Weighting Systems

Octave Band Analysis  - When is it Indicated?

Octave Band Measurement
     Operation of Precision Sound Level Meter
     Measurement of Total Sound Levels in Octave Bands
     Measurement of Neighborhood  Residual Sound Levels in Octave Bands

The Mathematics of Octave Band Sound Level Measurement

     Calculation of  Source Sound Level  from  Measured Total  and Neighborhood Residual Sound Levels

Field Exercise to Familiarize Students with Operation of Octave Band Analyzer

Octave Band Analysis Noise Measurement Report Form

Regulation of Sound Levels in Octave Bands in New Jersey

     Relevant portions:
     New Jersey Administrative Code - Title 7, Chapter 29,  Subchapter 1 - Noise Control
     ("NJAC 7:29")       
     NJAC 7:29 Subchapter 2 - Procedures for the Determination of Noise from Stationary Sources      
     Model Ordinance for the State of New Jersey

Field Exercises