Electrical audio signal processing systems and devices – Including frequency control
Reexamination Certificate
2005-03-29
2005-03-29
Nguyen, Duc (Department: 2643)
Electrical audio signal processing systems and devices
Including frequency control
C084S706000
Reexamination Certificate
active
06873708
ABSTRACT:
Since the prior-art is based upon analog circuitry, it uses sinusoidal frequency and/or amplitude modulation to simulate a rotating speaker at a reasonable cost. This invention uses a process based upon theoretically derived frequency modulation (FM) and experimentally measured amplitude modulation (AM) to simulate the rotating speaker. The main FM equation is based upon the Doppler effect and is equal to one over one plus a sinusoidal velocity coefficient. The main AM equation has a much narrower peak than sinusoidal modulation. This invention also contains several novel methods to control the angular velocity of the speakers, including changing the horn's speed dependent upon the original audio, modeling the speaker's acceleration to allow the physically realistic transitions between angular velocities, and adding noise to simulate natural variations in rotation. The digital apparatus that implements this invented process includes a digital processor and memory. In summary, the invented process is much more realistic sounding than prior-art.
REFERENCES:
patent: 3080786 (1963-03-01), Leslie
patent: 3629484 (1971-12-01), Suzuki
patent: 3749837 (1973-07-01), Doughty
patent: 3943465 (1976-03-01), Uchiyama
patent: 3973223 (1976-08-01), Uchiyama
patent: 3973462 (1976-08-01), Uchiyama
patent: 4000676 (1977-01-01), Love
patent: 4008641 (1977-02-01), Takada et al.
patent: 4031795 (1977-06-01), Bunger
patent: 4035582 (1977-07-01), Okamoto
patent: 4064778 (1977-12-01), Uchiyama
patent: 4108041 (1978-08-01), Moog et al.
patent: 4162372 (1979-07-01), Gross
patent: 4308422 (1981-12-01), Schmoll, III
patent: 4308428 (1981-12-01), Finch
patent: 4370654 (1983-01-01), Krutsch
patent: 4428270 (1984-01-01), Ippolito
patent: 5848166 (1998-12-01), Fisher et al.
Acoustic Information Processing Lab, LLC
Lao Lun-See
Nguyen Duc
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