High fidelity earphone and hearing aid
First Claim
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1. A method of providing sound to the ear, comprising, providing a first path to the ear canal for sound, and providing a second path to the ear canal for said sound approximately 180 degrees out of phase with the sound in said first path.
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Abstract
A high fidelity earphone or hearing aid utilizes an acoustic path from a location near where the sound is delivered to the ear, to a location near the backside of the sound-producing diaphragm. A vent to the atmosphere from a location near the backside of the sound-producing diaphragm is also taught. A microphone on the earphone makes it safe to listen to the radio or a tape player in public, because of the capability of hearing outside sounds.
237 Citations
36 Claims
- 1. A method of providing sound to the ear, comprising, providing a first path to the ear canal for sound, and providing a second path to the ear canal for said sound approximately 180 degrees out of phase with the sound in said first path.
- 5. A method of providing sound to the ear comprising providing a first path from one surface of a diaphragm, which vibrates and causes variable air pressure, to the ear canal for sound, and providing a second path from inside the ear at approximately the termination of said first path to a location having the variable air pressure caused by the other surface of said diaphragm.
- 8. An earphone comprising a manifold comprising a chamber having at least first and second walls, a magnet fixed with respect to said manifold chamber, a coil of wire adapted to receive electrical signals representing sound and to provide a magnetic field in accordance with said sound, said coil of wire disposed near said magnet and adapted to magnetically interact with said magnet, a diaphragm having its periphery fixed in proximity to said first wall of said manifold chamber and said diaphragm being attached to said coil and adapted to be driven thereby to provide air vibrations, venting means for venting the pressures from said diaphragm to the atmosphere, said first wall of said manifold chamber in proximity to said diaphragm having at least one hole therethrough wherein said diaphragm provides air vibrations through said holes into said chamber of said manifold, an eartip comprising a first conduit therein adapted to receive said air vibrations on one end and the other end of said eartip adapted to fit into the ear, a second conduit running from a location near said other end of said eartip, to said manifold chamber.
- 17. An earphone comprising a manifold having a chamber having at least two walls, a magnet fixed with respect to at least one wall of said manifold chamber, a coil of wire adapted to receive electrical signals representing sound and to provide a magnetic field in accordance with said sound, said coil of wire disposed so that said magnetic field magnetically interacts with said magnet, a diaphragm having first and second sides, and having its periphery fixed with respect to one of the walls of said manifold chamber and said diaphragm being attached to said coil and adapted to be vibrated thereby, providing an output of sound on its first side, the wall of said manifold chamber near said second side of said diaphragm having a plurality of holes therethrough, an air baffle next to said diaphragm, on the first side of said diaphragm, an eartip having a first conduit therethrough, said first conduit adapted to receive the output through said air baffle on one side of said eartip which is adapted to fit into the ear on the other side and a second conduit disposed to run from a location approximately at the end of said eartip adapted to fit into the ear, to said manifold chamber.
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21. An earphone having a diaphragm, said diaphragm having a front side and a back side, and an eartip which fits inside the ear and which eartip has two conduits therein;
- one of said conduits being adapted to receive the output from the front side of said diaphragm and transmit it to the end of said eartip which fits inside the ear, a manifold chamber on the back side of said diaphragm, the other of said conduits running from a location near the end of said eartip, which fits inside the ear, to said manifold chamber.
- View Dependent Claims (22, 23)
- 24. An earphone comprising a diaphragm adapted to be vibrated in accordance with sound, a first conduit for delivery of sound vibrations to the ear, one surface of said diaphragm disposed to deliver sound vibrations to an ear canal through said first conduit, a second conduit, running from a location in close proximity to where sound is delivered by said first conduit, to the other surface of said diaphragm.
- 27. An earphone comprised of a diaphragm having front and back sides, first and second conduit means, one end of said first conduit means disposed to connect said front side of said diaphragm to a location for delivery of sound in the ear canal of a wearer of the earphone and one end of said second conduit means disposed to connect said back side of said diaphragm to approximately said same location.
- 31. An earphone comprising an eartip having a first path therethrough for providing sound to the ear canal, a second path for providing sound to the ear canal for sound approximately 180 degrees out of phase with the sound in said first path, said first and second paths terminating at approximately the same location at their ends providing said sound.
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36. An earphone comprising a manifold comprising a chamber, a diaphragm disposed in fixed proximity to said chamber and adapted produce sound vibrations of air in said chamber from one side of said diaphragm, an eartip in fixed proximity to said diaphragm, a first sound conduit extending from the other side of said diaphragm through said eartip and a second sound conduit extending from said chamber to a location near the end of said first sound conduit.
Specification