Acoustic transducer with selective driving force distribution
AssigneeSonigistix Corporation
InventorsMichael Montour, David Alexander Todd
Life of this patent
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Abstract
An acoustic transducer with partially driven area of the diaphragm such that the driving forces are asymmetric with respect to the frame axis of symmetry or angled with respect to edges of diaphragm support frame to provide uniform frequency response of the transducer. The elongate magnet sections surround portions of the diaphragm with a fringing magnetic field within which a circuit of conductor strips is positioned such that selectively excited vibration modes of the diaphragm provide a smooth frequency response.
Claims24
An acoustic transducer comprising, a substantially polygonal frame having inner edges defining an opening, a flexible diaphragm mounted relative to said frame so as to have a driven area disposed within said opening, at least one magnetic driver means mounted adjacent at least one side of said diaphragm so as to be spaced from said diaphragm, an electrical conductor circuit carried by said diaphragm, said electrical conductor circuit being configured so as to extend in generally opposing relationship with respect to said at least one magnetic driver means from an input to an output, and said at least one magnetic driver means being oriented at an angle which is not parallel or perpendicular with respect to said inner edges of said frame so that resulting driving forces are provided to said diaphragm are such that the distribution of the driving forces is angled transversely and without reflection symmetry relative to said inner edges of said frame.
An acoustic transducer comprising, a substantially polygonal frame having inner edges defining an opening, a flexible diaphragm mounted relative to said frame so as to have a driven area disposed within said opening, a plurality of magnetic driver means each being a bar magnet having opposite ends and said bar magnets being arranged in at least one chain in end-to-end relationship adjacent at least one side of said diaphragm so as to be spaced from said diaphragm, an electrical conductor circuit carried by said diaphragm, said electrical conductor circuit being configured so as to extend in generally opposing relationship with respect to each of said magnetic driver means of the at least one magnet chain from an input to an output, and said at least one magnet chain being oriented at a first angle with respect to said inner edges of said frame so that resulting driving forces are provided to said diaphragm such that the distribution of the driving forces is angled transversely and without reflection symmetry relative to said inner edges of said frame.
An acoustic transducer comprising:
- a) a substantially polygon frame with at least one axis of symmetry and having an opening therein;
- b) a flexible diaphragm disposed within said opening;
- c) an electrical conductor means applied to at least a portion on at least one face of said diaphragm;
- d) at least one magnetic driver means arranged in at least one magnet chain disposed on at least one side of said diaphragm and as to be spaced from said diaphragm;
- and,
- e) said at least one magnetic driver means oriented such that resulting magnetic driving forces are provided to said portion of said diaphragm such that a distribution of said forces is asymmetric relative to any axis of symmetry of said frame.
Dependencies are inferred from the claim text.