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Training

Environmental Noise Measurement & Analysis Seminar

Mon-Tues, Mar 18-19, 2024
Mon-Tues, Oct 7-8, 2024

Background Discussion & ABSTRACT

The 2 day Environmental Noise Seminar training is intended for engineers, technicians and hygienists working in the fields of environmental, community, and/or Industrial noise measurement, analysis and control. The training will be presented at the Navcon office in Fullerton CA. 

Note: The training room is on the 2nd floor and attendees need to use stairs to get to the 2nd floor.

We will review the fundamentals of acoustics, sound source characterization, and outdoor sound propagation based upon national and international standards and  guidelines.

Upon completion of the training, attendees will be able to measure, predict and assess environmental noise impact.   Classroom lectures will be supported by hands-on laboratories which focus on test instrumentation &  planning, digital signal processing, sound pressure &  noise modeling.

The training fee includes lunch and refreshment (i.e., coffee, tea, soda, water).  Vegetarian lunch option is available on request.

Fundamentals of Acoustics

  • Basic physics: definition of motion and the wave equation
  • Sound pressure, sound intensity and sound power
  • The decibel scale (adding/subtracting/ averaging sound levels)
  • Noise descriptors Lp, LI, Lw, Ln, Leq, Lm
  • Time weighting & frequency filtering
  • Near, far, free and reverberant sound fields
  • Time and frequency domain (1/1,& 1/3 octave and FFT) analysis
  • Measurement considerations
  • Wave propagation, sound spreading, reaction, screening, sound refraction

OUTDOOR NOISE PROPAGATION

  • Principal formulas and methodologies
  • Transmission path attenuation (divergence, air absorption, screening and scattering reflections, ground effects, wind effects, meteorological stability)
  • Review of National & International guidelines/standards (ISO, VDI, GENERAL PREDICTION METHOD, CONCAWE, FHWA, …)
  • Development of propagation models for rail, traffic, industry and leisure noise)
  • “Rules of Thumb” for outdoor noise analysis

SOURCE CHARACTERIZATION

  • Point, line and area sources
  • Noise source emission (intensity and sound power)
  • Frequency spectrum (full and third octave band)
  • Interior sound pressure level, exterior sound power level
  • Sound radiation/directivity patterns
  • Steady state, transient and tonal sound sources
  • Measurement in accordance with ISO, ANSI and manufacturer standards

Demonstrations, Hands on Laboratory and Outdoor Exercises

  • Sound power determination using sound pressure & sound intensity methods
  • Community noise measurement and characterization based upon statistical descriptors
  • Development of a 3-D, computer generated acoustical model
  • Noise level predictions and noise wall/berm design using the “verified” analytical model
  • Presentation of measured noise data, sound level diagrams and noise contours
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