When a person listens to loudspeakers, the perceived sound is affected not only by the loudspeaker properties but also by the acoustics of the surroundings. Loudspeaker equalization can be used to correct the loudspeaker-room response. However, when the listener moves in front of the loudspeakers, both the loudspeaker response and room effect change. In order for the best correction to be achieved at all times, adaptive equalization is proposed in this paper. A loudspeaker-correction system using the listener's current location to determine the correction parameters is proposed. The position of the listener's head is located using a depth-sensing camera, and suitable equalizer settings are then selected based on measurements and interpolation. After correcting for the loudspeaker's response at multiple locations and changing the equalization in real time based on the user's location, a loudspeaker response with reduced coloration is achieved compared to no calibration or conventional calibration methods, with the magnitude-response deviations decreasing from 10.0 to 5.6 dB within the passband of a high-quality loudspeaker. The proposed method can improve the audio monitoring in music studios and other occasions in which a single listener is moving in a restricted space.
Lindfors, Joel; Liski, Juho; Välimäki, Vesa
Affiliation: Acoustics Lab, Department of Signal Processing and Acoustics, Aalto University, Espoo, Finland
JAES Volume 70 Issue 9 pp. 722-730; September 2022
Publication Date: September 12, 2022
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