Acoustics, Noise, Dynamics, Vibration, Information Services
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Acoustics, Noise, Dynamics, Vibration, Information Services |
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NVA Minor SoftwareThe following applications have proved useful in some instances, and may be of interest to others. No excessive effort has been made to provide detailed on-line help or elegant interfaces. No guarantee of accuracy is provided either. If you do require any further information - or have any comments, please contact us: software@noiseandvibration.com
In the case of an extended plane incoherent radiator then the attenuation of Sound Pressure Level with distance will not be in proportion to distance squared (i.e. -6dB per distance doubling) until the measurement position is at a distance large enough to be within the "Far Field". Sometimes it is not possible to be within the Far Field to take measurements, or you require to calculate a Sound Pressure Level at a "Near Field" location.This little calculator enables computation of Sound Pressure Levels at any distance on the basis of a Sound Pressure Level at any other distance (z), from an extended panel of defined size (x, y). These calculations can be useful for assessment of "panel sources" (e.g. the side of a building) or "line sources" (e.g. visible section of road or railway line - without resort to "angle of view" corrections). Download a simple Windows Application to carry out this mundane calculation.
Simple
Incoherent Panels (Download)
UK "Calculation of Road Traffic Noise" specifies formulae for barrier assessment. This calculator facilitates these calculations. Just enter the height of the source (road), the relative distance and height of up to 2 intervening barriers and the relative distance and height of the receive location. The programme tells you if the barrier screens and what the attenuation will be. (Not very exciting - but these calculations are painfully boring by hand !). CRTN
Road Traffic Barrier Calculator (Download)
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