Sound reproducing system utilizing motional feedback and integra

Details Sound reproducing system utilizing motional feedback and integra Sound reproducing system utilizing motional feedback and integra

1979-08-17

1981-03-17

Robinson, Thomas A.

H04R 300

Patent

active

042569230

ABSTRACT:
A sound reproducing system utilizes motional feedback and an integrated magnetic structure to reduce loud speaker distortion. The loud speaker structure of such system comprises a main electromagnetic structure and a cone motion sensing structure. The main electromagnetic structure includes a cup-shaped cylindrical iron outer pole piece, a solid cylindrical permanent magnet, a solid cylindrical iron inner pole piece, a main voice coil, a thin cylindrical bobbin, a cone, a speaker frame, and flexible webs. The cone motion sensing structure includes a hollow cylindrical iron outer sleeve, a hollow cylindrical copper outer sleeve, a disc-shaped non-magnetic support, a hollow cylindrical copper inner sleeve, a solid cylindrical iron rod, a feedback coil, a thin feedback bobbin, and a conical member connecting the feedback bobbin to the voice coil bobbin. A stability control network is connected to the feedback coil for suppressing any supersonic transmission peaks appearing in the motional feedback signal. A feature of the present invention is that: the cone motion sensing structure utilizes the stray magnetic field of the main electromagnetic structure to provide the motional feedback signal which is functionally related to axial cone velocity, which motional feedback signal is fed directly to the stability control network as aforementioned. An advantage of the present invention is that it allows use of smaller loud speakers and loud speaker enclosures.

REFERENCES:
patent: 3798374 (1974-03-01), Meyers
patent: 3821473 (1974-06-01), Mullins
patent: 3878748 (1975-04-01), Spence
patent: 4025722 (1977-05-01), Karron
"The Philips Motional Feedback System", undated Trade Circular distributed by North American Philips Corp.

Affiliated with

Also associated with

Rating

Sound reproducing system utilizing motional feedback and integra does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Sound reproducing system utilizing motional feedback and integra, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sound reproducing system utilizing motional feedback and integra will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1647251