Patent ID: 7983425
Filing Date: 2011-07-19
Classification: H04R

Abstract:
1. A method for detecting acoustic shock in an audio input signal (s(t)), comprising the steps of monitoring the input signal (s(t)) in the time-domain, thereby detecting a signal floor (Sn), detecting a peak level of the input signal (L), detecting an attack time (t determining a shock contrast level (dL) as a difference between the peak level (L) and the signal floor (Sn), determining a shock index (SI) based on a shock index normalization constant (σ), the shock contrast level (dL) and the attack time (t comparing the shock contrast level (dL) and the shock index (SI) with respective thresholds (MCL; MSI) and indicating an acoustic shock if one or both of said thresholds (MCL; MSI) are exceeded.