Commentaires sur le dépouillement des événements acoustiques isolés

Abstract
We consider isolated noise events, due for instance to isolated vehicles passing in front a sonometer, with an increasing step and a decreasing one. For a time varying level L(t) = Lmax + 10 log b(t), (b an attenuation fonction model, 0<b≤1), and the noise emergence a dB we consider noise equivalent level Leq = Lmax - I(a) corresponding to all the delay for which Leq ≥ Lmax-a ; I(a) is the "intrinsic" relation of the acoustic event, depending of b function. Some properties of I are investigated, it is shown that the influence of b is rather weak for different b models, with no more than 1.6 dB for an emergence a = 15 dB.