Multiple-point equalization of room impulse response based on the human perception characteristics

In sound reproduction system such as loudspeaker-room system, the acoustic characteristics of the room will affect sound quality. Equalization is therefore essential for room response. Besides, adding loudness conversion filter to traditional equalizer can result in an optimum effect in auditory scale. Considering the human auditory characteristics and the limitation of single-point equalization, this paper presents a new digital filtering approach with multiple-points equalization of room which realizes a good match to the psycho acoustical frequency scale of human hearing. Experimental results show that the proposed method which was based on the human auditory characteristics can obtain ideal equalization results, especially in the frequency bands where auditory system is sensitive to frequency.