Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Having acoustic wave modifying structure
Patent
1996-01-16
1998-06-09
Kuntz, Curtis
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
Having acoustic wave modifying structure
181155, H04R 2500
Patent
active
057647836
ABSTRACT:
The invention comprises a device capable of emitting either acoustic or electromagnetic radiant energy. The device has at least one movable transducing element for producing this energy, and at least one reflector with a smooth concave surface which reflects the energy emitted from the transducing element. The shape of the reflector surface is preferably defined by either a rotated ellipse or a rotated parabola. A reflector surface of either shape is characterized by a continuum of distinct focal points that define a focal curve, such that each distinct focal point of the continuum is a unique focal point of each ellipse or parabola in the continuum forming the reflector surface. The radius of curvature of the parabolic surface of revolution can be extended up to an infinite length, causing the focal curve to appear as a straight line. The movable transducing element may be positioned above the reflector surface to produce energy that is redirected by the reflector surface into a focal region containing the focal curve, causing the focal region to appear as the source of the energy. The radiation pattern, or beamwidth, of this reflected energy will be substantially frequency invariant when the transducer is positioned symmetrically about the axis of revolution. However, the beamwidth can be adjusted by moving the transducer to another location. In addition, a means is provided for absorbing or attenuating that radiation which is not reflected from the reflector surface, in order to eliminate interference between reflected and non-reflected radiation.
REFERENCES:
patent: 1716199 (1929-06-01), Von Hofe et al.
patent: 2064911 (1936-12-01), Hayes
patent: 3007133 (1961-10-01), Padberg, Jr.
patent: 3754618 (1973-08-01), Sasaki
patent: 3819005 (1974-06-01), Westlund
patent: 3819006 (1974-06-01), Westlund
patent: 3908095 (1975-09-01), Jinsenji
patent: 4190739 (1980-02-01), Torffield
patent: 4225010 (1980-09-01), Smith
patent: 4348750 (1982-09-01), Schwind
patent: 4421200 (1983-12-01), Ferralli et al.
patent: 4474258 (1984-10-01), Westlund
patent: 4475620 (1984-10-01), Carlsson
patent: 4588042 (1986-05-01), Palet et al.
patent: 4629030 (1986-12-01), Ferralli
patent: 4701951 (1987-10-01), Kash
patent: 4783824 (1988-11-01), Kobayashi
patent: 4836328 (1989-06-01), Ferralli
patent: 4836329 (1989-06-01), Klayman
patent: 4844198 (1989-07-01), Ferralli
patent: 4907671 (1990-03-01), Wiley
patent: 5216209 (1993-06-01), Holdaway
patent: 5258538 (1993-11-01), Queen
patent: 5268539 (1993-12-01), Ono
patent: 5306880 (1994-04-01), Coziar et al.
patent: 5371806 (1994-12-01), Kohara et al.
patent: 5402502 (1995-03-01), Boothroyd et al.
patent: 5418336 (1995-05-01), Negishi et al.
patent: 5532438 (1996-07-01), Brown
Sonic Systems, Inc., Soundsphere Product Technical Information, Model No. 110 A, Fall 1994.
Barnie Rexford N.
Kuntz Curtis
Technology Licensing Company
LandOfFree
Variable beamwidth transducer does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Variable beamwidth transducer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variable beamwidth transducer will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2210951