AES British Section lectures - November 2006
Room Perfect DSP Room Correction
Jan Abildgaard Pedersen, Lyngdorf Audio
www.lyngdorf.com
A novel method is presented for equalizing a loudspeaker, for a specific listening position in order to compensate for an influence of the room in which it is positioned. The method is based on measuring the sound pressure in the listening position (focus position) and in at least 3 randomly selected positions scattered across the entire listening room (room positions). The measurement in the listening position holds information about the listener's access to the sound field while the room positions hold information about the energy in the 3D sound field. The correction for the listening position is then bound by upper and lower gain limits calculated as a function of frequency from the information about the 3D sound field.
Jan Abildgaard Pedersen graduated with a Masters Degree in Electrical Engineering from the University of Aalborg in Denmark in 1993, where he specialized in Acoustics. For more than 10 years Jan was employed at Bang & Olufsen, Denmark, in a position as Technology Specialist for Acoustics and DSP. In summer 2004 Jan joined AM3D, Denmark, in a position as Senior Research Manager. As of 1st of October 2005 Jan joined Lyngdorf Audio (formerly TACT) in a position as Senior Research Manager, and is now the Chief Technology Officer of Lyngdorf Audio. Jan has previously presented work on "Low Frequency Sound Field", "Near-Field Acoustic Measurements", "Warped Filters", "Volterra Series", "Subwoofer Requirements", "Acoustic Reflectors" and "Loudspeaker/Room Adaption".
Lecture recording - mp3 format (21.4 MB)
Lecture slides - pdf format (1.0 MB)
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