Pollution Control
Consultancy and Design

Noise Prediction (Modeling of Dispersion of Noise)
 

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Opus Operandi


We adhere to the old, good, simple
and quite often forgotten business philosophy that the most effective form of advertising is to satisfy our clients.
 

Our strength


We not only pinpoint,
we also effectively resolve
engineering problems.
 

Pollution Control Consultancy and Design carries out noise prediction
(noise propagation, noise dispersion) modeling that takes into account:
1.    spectrum of noise (frequency of noise in octave or one-third octave bands);
2.    geometric spreading (divergence, distance attenuation) of noise;
3.    absorption of noise by air depending on atmospheric temperature, pressure and humidity;
4.    atmospheric stability (temperature gradient effects, temperature inversion);
5.    speed and direction of wind;
6.    topography;
7.    ground effects (absorption); and
8.    presence of roads, industrial sites, buildings, noise barriers, enclosures and foliage.

Depending on project-specific requirements, we carry out the noise dispersion modeling with
five different programs (software), viz.
1.   Brüel & Kjær (B&K) Predictor 7810 (Denmark) - industrial, road traffic and railway noise;
2.   DataKustic Cadna A (Germany) - industrial, road traffic and railway noise;
3.   RTA Environmental Noise Model (ENM) (Australia) - industrial noise;
4.   Federal Highway Administration (FHWA) Traffic Noise Model (FHWA TNM)
      (United States) - road traffic noise; and/or
5.   Pollution Control Consultancy and Design (PCCD) developed-in-house
      industrial noise model (Australia).
 

Below, an example of results of our noise dispersion modeling with
the PCCD developed-in-house software -
- isopleths (isophones) of the LAeq,T around drilling operation (source of noise at 0,0): 


Such results allow to significantly reduce noise impact in sensitive directions just by proper orientation of noisy equipment.

Note that the isopleth of 50 dB(A) reaches:

  •     450 metres on the East;

  •     500 metres on the West;

  •     just over 500 metres on the South; and

  •     nearly 1100 metres on the North.