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Primary Examiner: Olms, Douglas W.
Assistant Examiner:
Attorney: Hughes & Barnard

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Title: Dimensional sound producing apparatus and method

Abstract: A sound reproducing system having right and left speakers which transmit right and left stereo sounds, respectively. The right signal, in addition to driving the right speaker, is inverted and delayed to produce a compensating signal which is transmitted to the left speaker to produce a delayed compensating sound pattern from the left speaker. The amount of delay and amplitude of the compensating sound pattern is selected so that the major sound pattern emanating from the right speaker is at least partially cancelled at the location of the hearer's left ear. The signal for the left speaker is inverted and delayed in a similar manner to produce a compensating sound pattern from the right speaker to at least partially cancel the major sound pattern emanating from the left speaker at the location of the hearer's right ear. The result is to give the hearer a greater dimensionalized impression of the overall sound patterns.

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Inventors: Carver, Robert W. (Woodinville, WA, US)

Application Number: 027472
Filing Date: 1979-04-05
Publication_date: 1980-08-19
Assignee:
Primary Class(es): 381/303 381/1, 381/97, 381/98
Other Classes:
US Patent Ref:

3236949	Feb, 1966	Atal et al.	179/1.
4118599	Oct, 1978	Iwahara et al.	179/1.
4121059	Oct, 1978	Nakabayashi	179/1.
4139728	Feb, 1979	Haramoto et al.	179/1.

Other Refs: 2640254

Mar, 1978	DE

Other References: "Letters to the Editors" in Acustica, vol. 24, 1971 pp. 222 to 225, by Damaske and Mellert.
"Head-Related Two-Channel Stereophony with Loudspeaker Reproduction", by Damaske, 1971 by Acoustical Society of America, pp. 1109-1115, Journal of Acous. Soc. of America, vol. 50, No. 4, Part 2.
"Some Techniques Toward Better Stereophonic Perspective" by Bauer, in IEEE Transactions on Audio, May-Jun. Part I 1963, pp. 88-92.
"Sound Localization in the Median Plane" by Blauert in Acoustica, vol. 22, 1969/70, pp. 205-213.
"Ein Verfahren . . . " by Damaske and Mellert in Acoustica, vol. 22, 1969/70, pp. 153 to 162.
"Sound Images Localization Controlling Technique" by Gotoh in National Technical Report, vol. 22, No. 4, pp. 460-466, Aug. 1976.