Electricity: motive power systems – Plural – diverse or diversely controlled electric motors – Plural – diverse motor controls for different motors
Patent
1988-11-02
1990-03-20
Isen, Forester W.
Electricity: motive power systems
Plural, diverse or diversely controlled electric motors
Plural, diverse motor controls for different motors
381 1, H04S 100
Patent
active
049107798
ABSTRACT:
A stereo audio processing system for a stereo audio signal processing reproduction that provides improved source imaging and simulation of desired listening environment accoustics while retaining relative independence of listener movement. The system first utilizes a synthetic or artificial head microphone pickup and utilizes the results as inputs to an equalization circuit with the outputs coupled to a cross-talk cancellation compensation circuit utilizing minimum phase filter circuits to adapt the head diffraction compensated signals for use as loudspeaker signals. The system provides for head diffraction compensation including equalization and cross-coupling while permitting listener movement by modifying the cross-talk cancellation and diffraction compensation at frequencies substantially above approximately ten kilohertz while maintaining substantially accurate equalization for the desired incidence angle.
REFERENCES:
patent: 3088997 (1963-05-01), Bauer
patent: 3236949 (1966-02-01), Atal et al.
patent: 3238304 (1966-03-01), Yaita et al.
patent: 3566294 (1971-02-01), Takahashi
patent: 3710023 (1973-01-01), Greuzard, Sr. et al.
patent: 3725586 (1973-04-01), Iida
patent: 3892624 (1975-07-01), Shimada
patent: 4058675 (1977-11-01), Kobayashi et al.
patent: 4118599 (1978-10-01), Iwahara et al.
patent: 4119798 (1978-10-01), Iwahara
patent: 4136260 (1979-01-01), Asahi
patent: 4139728 (1979-02-01), Haramoto et al.
patent: 4192969 (1980-03-01), Iwahara
patent: 4199658 (1980-04-01), Iwahara
patent: 4218585 (1980-08-01), Carver
patent: 4219696 (1980-08-01), Kogure et al.
patent: 4308423 (1981-12-01), Cohen
patent: 4356349 (1982-10-01), Robinson
patent: 4359605 (1982-11-01), Haramoto et al.
patent: 4388494 (1983-06-01), Schone et al.
patent: 4489432 (1984-12-01), Polk
patent: 4503554 (1985-03-01), Davis
patent: 4566119 (1986-01-01), Peters
patent: 4731848 (1988-03-01), Kendall et al.
patent: 4748669 (1988-05-01), Kalyman
patent: 4819269 (1989-04-01), Klayman
Cooper, Duane H., "Calculator Program for Head-Related Transfer Function", Audio Engineering Society, Vol. 30, No. 1/2, 1982 Jan./Feb., pp. 34-38.
"Controlling Sound-Image Localization in Stereophonic Reproduction", J. Audio Engineering Society, Vol. 29, No. 11, 1981, Nov., pp. 794-799.
"Controlling Sound-Image Localization in Stereophonic Reproduction: Part II*", J. Audio Eng. Soc., Vol. 30, No. 10, 1982, Oct., pp. 719-723.
"Precision Sound-Image-Localization Technique Utilizing Multitrack Tape Masters*", Audio Eng. Soc., Vol. 27, No. 1/2, 1979 Jan./Feb., pp. 32-39.
"On the Simulation of Sound Localization", J. Accoust. Soc., Jpn (E) 1, 3 (1980), pp. 167-174.
Bartlett, Bruce, "Recording Techniques: Simple Stereo Microphone Techniques", db Sep.-Oct., 1986.
"On Acoustical Specification of Natural Stereo Imaging", An Audio Engineering Society Reprint (Presented at the 66th Convention, 1980, May 6-9, Los Angeles), 1649 (H-7), pp. 1-53.
Schwarz, Von. L., "Zur Theorie der Beugung einer eben Schallwelle an der Kugel", Akustische Zeitschrift, 1943, pp. 91-117.
Schroeder, M. R. et al., "Computer Simulation of Sound Transmission in Rooms", IEEE Conv. Record, pt. 7, pp. 150-155 (1963).
Schroeder, M. R., "Digital Simulation of Sound Transmission in Reverberant Spaces", J. Acoust. Soc. Am., Vol. 47, pp. 424-431 (Feb. 1970).
Schroeder, M. R., "Computer Models for Concert Hall Acoustics", Am. Journal Phys., Vol. 41, pp. 461-471 (April, 1973).
Schroeder, M. R. , "Models of Hearing", Proc. IEEE, Vol. 63, pp. 1332-1350 (Sep., 1975).
Damaske, P., "Head-Related Two-Channel Stereophony with Loudspeaker Reproduction", J. Acoust. Soc. Am., Vol. 50, pt. 2, pp. 1109-1115 (Oct., 1971).
Mehrgardt, S., et al., "Transformation Characteristics of the External Human Ear", J. Acoust. Soc., Am., Vol. 61, pp. 1567-1476 (Jun., 1977).
Cooper, H. et al., "Corrections to L. Schwarz, `On the Theory of Diffraction of a Plane Soundwave Around a Sphere`, (`Zur Theorie der Beugung einer ebenen Schallwelle an der Kugel`, Akust Z 8, 91-119 (1943))", J. Acoust. Soc. Am., Vol. 80, pp 1793-1802 (Dec., 1986).
Gerzon, M. A., "Stereo Shuffling: New Approach--Old Technique", Studio Sound, pp. 123-130 (Jul., 1986).
Parsons, T. W., "Super Stereo: Wave of the Future?", The Audio Amateur, Vol. IX, pp. 19-20 (Jun., 1978).
Nakabayashi, K., "A Method of Analyzing the Quadraphonic Sound Field", J. Audio Eng. Soc., Vol. 23, pp. 187-193 (Apr., 1975).
Bauck Jerald L.
Cooper Duane H.
LandOfFree
Head diffraction compensated stereo system with optimal equaliza does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Head diffraction compensated stereo system with optimal equaliza, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Head diffraction compensated stereo system with optimal equaliza will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-797917