Dual-driver bass speaker with acoustic reduction of out-of-phase

Details Dual-driver bass speaker with acoustic reduction of out-of-phase Dual-driver bass speaker with acoustic reduction of out-of-phase

1994-04-29

1996-07-16

Isen, Forester W.

Electrical audio signal processing systems and devices

Loudspeaker feedback

381 89, 381 97, H04R 300, H04R 102

Patent

active

055374794

ABSTRACT:
A modification and addition to the prior art type of multiple driver push-pull loudspeaker system for subwoofer, bass, or lower midrange frequencies, which prior system is able to reduce the even-order push-pull out-of-phase driver-produced 2nd, 4th, etc. distortion harmonics by the order of 15 to 25 dB in the radiated sound waves. The present invention reduces the important remaining in-phase distortion harmonics using outputs of sensors mounted on the voice coils of each driver to generate electrical signals which are processed and used to substantially lower the remaining in-phase distortion with feedback through a single signal amplifier chain. The present invention contributes from 15 to 30 dB of in-phase distortion reduction of odd-order harmonics and, at relatively high sound power levels only, also reduces some in-phase, relatively lower level, even-order distortion. In addition, separate electrical outputs processed from sensor motion can provide pure even-order harmonics in real time, which outputs can be made available for other possible uses. Obviously, the relatively pure odd-order harmonics normally fed to a mixer in the signal amplifier chain could also be used as a separate output if desired.

REFERENCES:
patent: 4016953 (1977-04-01), Butler
patent: 4182931 (1980-01-01), Kenner
patent: 4387270 (1983-06-01), Sakano et al.
patent: 4528691 (1985-07-01), Edwards
patent: 4573189 (1986-02-01), Hall
patent: 4704729 (1987-11-01), Franzini et al.
patent: 4727584 (1988-02-01), Hall
patent: 5073945 (1991-12-01), Kageyama et al.
patent: 5327504 (1994-07-01), Hobelsberger
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