Patent ID: 7995772
Filing Date: 2011-08-09
Classification: G01H

Abstract:
1. A method for assessing interfering noise in motor vehicles, the method comprising the acts of: dividing the noise occurring during a predefined measuring time into different frequency ranges comprising at least a low-frequency range, a medium-frequency range and a high-frequency range; within each of the frequency ranges, determining changes in noise level relative to a background noise; and evaluating the determined changes in noise level to assess the interfering noise, wherein for determining the background noise, the method further comprises the acts of: scanning the noise within their frequency range with first time windows; and averaging the noise over the first time window, wherein for determining an unsteady noise fraction, the noises are scanned within their frequency range with second time windows having a duration shorter than that of the first time windows, and wherein the second time windows for higher frequency ranges have a shorter time duration than for lower frequency ranges.