Patent ID: 7574009
Filing Date: 2009-08-11
Classification: H04R

Abstract:
1. A method for controlling bass reproduction of an audio signal in an electroacoustic converter having a resonance frequency, the method comprising the steps of: isolating and amplifying first frequency components of the audio signal with a gain factor which is calculated based on the audio signal; combining the audio signal and the amplified first frequency components of the audio signal to produce a modified audio signal; and feeding the modified audio signal to the electroacoustic converter; wherein the audio signal is bandpass filtered for isolation such that the first frequency components are above the resonant frequency of the electroacoustic converter and wherein said first frequency components are amplified with a gain factor, wherein the gain factor is controlled by second frequency components of the audio signal, wherein the second frequency components are below said resonant frequency and by at least one of an envelope and an energy of said second frequency components.