Sound level variation correcting method for use in vehicle, involves detecting characteristics` changes of frequency section according to given criteria, so as to determine control variable for variation of signal amplification

摘要

The method involves analyzing audio receiving signal on variation, and determining a control variable for the variation of signal amplification. An averaged frequency section is continuously generated from frequency spectrum of the audio-receiving signal for a given time slot. Characteristics` changes of the frequency section are detected according to given criteria, so as to determine the control variable for the variation of the signal amplification. A time frame for the change of the frequency section is provided as the criteria. An independent claim is also included for an audio-receiving system for executing a method for correcting sound level variation.