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Adding of NAX type dynamic indicators

From a Receiver type calculation and in the presence of railway sources, it is now possible to launch a simulation to calculate NAX type dynamic indicators based on the Lmax,S, SEL and LeqTp indicators. This calculation must be performed with the Signature storage mode, as is the case for the display window of the acoustic signature of trains.

Once the calculation is finished, this information is available in a window called Dynamic indicators, accessible directly by right-clicking on the calculation concerned.

These new indicators, presented in France in 2022 in article 4 of the Mobility Orientation Law, make it possible to indicate the number of train passages causing a certain noise level to be exceeded.

The available indicators are:

•NAX_Lmax,S : Number of train passages for which the value of the indicator Lmax,S exceeds the value X.

•NAX_SEL : Number of train passages for which the value of the SEL indicator exceeds the value X.

•NAX_LeqTp : Number of train passages for which the value of the LeqTp indicator exceeds the value X.

 

These indicators are displayed via a diagram, with the values ​​in dB on the vertical (in steps of 2 dB), and on the horizontal the number of passages causing this value to be exceeded.

Values ​​can be expressed in dB(A) or dB(C).