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    NOISE ATTENUATION BY DISTANCE (Point Source)
noise distance calculator

    PROJECT DATA (Optional)

    Project
    Remarks
    Your ref Client
    Identification           Client's ref                  

    CALCULATION INPUT (Required)

    Source
    Select source input values difference between PWL and SPL
    Sound Power Level (PWL, Lw)
    Sound Pressure Level (SPL, Lp)        distance from source
     
    Noise Source Levels
    31.5631252505001k2k4k8kHz
    dB  Note: linear dB without weight factor
     
    Reduction by silencing equipment to be subtracted (mufflers, enclosures, ...)
    dB
     
    Transmission pathAtmospherical absorption
    sphericalTake into account
    hemi-sphericalNeglect
    quarter-spherical
     
    Immission Point (listener)
    Distance from Source
     
    Note: if the source is specified as SPL the transmission path will be taken the same as for the distance to the listener.
              Manufacturers often provide point source figures for spherical transmission, if in doubt verify with vendor and use PWL figures.
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