Anomalies of Wavefront Reconstruction in Stereo and Surround-Sound Reproduction
As a means of assessing imaging accuracy, this paper investigates the ability of 2-channel stereophonic and 3-channel horizontal Ambisonic surround-sound reproduction systems to reconstruct, in the vicinity of the listening position, an approximation to a plane-wave sound source. Stereo cannot achieve the correct relationship between particle velocity and pressure, and is seriously in error even in the "stereo seat." Horizontal surround-sound systems do get the pressure/velocity relationships correct at the center of the loudspeaker array, and there is a significant decrease in angular preference for the loudspeaker directions as the number of loudspeakers is increased. Even for four and six loudspeaker horizontal Ambisonic surround-sound systems, however, the reconstructed wavefront is only approximately correct near the center of the array at the lower audio frequencies.
Click to purchase paper or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!
This paper costs $33 for non-members, $5 for AES members and is free for E-Library subscribers.