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"The wireless music box has no imaginable commercial value. Who would pay for a message sent to nobody in particular?"
David Sarnoff, American radio pioneer ; 1921
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| Number | Title | Issue Date |
| 7333620 | Acoustic transducer with mechanical balancing One embodiment of a low-profile transducer includes a at least one fin perpendicularly mounted on a planar diaphragm, with a voice coil mounted onto the fin. The voice coil may reside in a strong uniform magnetic field. The locations at which the diaphragm is connec... | 02/19/2008 |
| 7319772 | Speaker device for improving mid/high-range frequencies A speaker device for improving mid/high-range frequencies includes a magnetic base, a frame annularly mounted to the magnetic base, a cone mounted to an inner side of the frame, a voice coil mounted to the cone and suspended in a gap of the magnetic base, and a dead... | 01/15/2008 |
| 7308108 | Helmet-mounted intercommunications and entertainment system An improved headset for a helmet includes an acoustic component of a relatively small size to permit insertion thereof within the helmet, a relatively soft and comfortable textile material configured to removably contain the acoustic component, a connector for remov... | 12/11/2007 |
| 7306073 | Electroacoustic transducer comprising a membrane with a middle area comprising stiffening grooves A membrane (20) has a membrane axis (5) and a middle area (50), a central cup-shaped depression (52) being provided around said membrane axis (5), which depression (52) preferably has a connecting channel (53), wherei... | 12/11/2007 |
| 7298861 | Loudspeaker A loudspeaker includes a housing with front and rear sides, a diagram flexibly connected to the housing, and an actuator or displacing the diaphragm with respect to the housing along a translation axis. The housing extends around the translation axis and includes a ... | 11/20/2007 |
| 7263198 | Loudspeaker A loudspeaker comprises a frame, a magnetic circuit unit, a vibration unit and a snap fastening device. The frame has a recess. The magnetic circuit unit is received in the recess of the frame. The magnetic circuit unit includes a yoke. The vibration unit is receive... | 08/28/2007 |
| 7242788 | Securing magnets in high-efficiency planar magnetic transducers In an audio system, cyanoacrylate adhesive can reliably hold neodymium magnets to a stator for a planar magnetic transducer when the transducer generates high output. In one implementation, the planar magnetic transducer can include multiple neodymium magnets aligne... | 07/10/2007 |
| 7233681 | Electromagnetic transducer with eccentrically mounted voice coil former An electromagnetic transducer such as an audio speaker which includes an asymmetric diaphragm to deliver smooth frequency response with reduced distortion by reduction of common modes in the diaphragm. Other benefits such as asymmetric directivity patterns can be re... | 06/19/2007 |
| 7203332 | Magnet arrangement for loudspeaker An electro-dynamic loudspeaker includes a frame, a plurality of magnets and a diaphragm. The frame includes a molded plastic body. The magnets may be molded into the frame in a determined configuration. The frame is mechanically coupled to the diaphragm such that th... | 04/10/2007 |
| 7198133 | Ear coupler A one-piece, transparent flexible ear coupler for use with hearing evaluation is disclosed. It includes an annular side wall and a bottom wall forming an acoustic chamber. A flexible adhesive-backed flange is disposed on the periphery of the ear coupler. The flange ... | 04/03/2007 |
| 7190804 | Speaker apparatus This invention provides a speaker apparatus that outputs sound having smooth frequency characteristics. To solve the inconvenience with the prior art, this invention is a speaker apparatus comprising a diaphragm and a cylindrical-shaped coil bobbin, and not comprisi... | 03/13/2007 |
| 7177440 | Electromagnetic transducer with asymmetric diaphragm An electromagnetic transducer such as an audio speaker which includes an asymmetric diaphragm to deliver smooth frequency response with reduced distortion by reduction of common modes in the diaphragm. Other benefits such as asymmetric directivity patterns can be re... | 02/13/2007 |
| 7171015 | Speaker apparatus A speaker apparatus has a frame to which a convex paper is attached. A bobbin with a voice coil is attached to the paper cone. A magnetic circuit is formed inside the frame. A damper suspending the bobbin is composed of a corrugation portion, which is positioned ort... | 01/30/2007 |
| 7146021 | Whizzer cone for loudspeaker for producing uniform frequency response A speaker cone is provided that contains a base portion, and the base portion has a front end and a rear end. The front end contains a plurality of discontinuities such that a first distance from a reference point on a longitudinal axis of the base portion to a firs... | 12/05/2006 |
| 7103196 | Method for reducing distortion in a receiver A receiver, such as for use in a hearing aid, is disclosed. The receiver comprises a housing and a diaphragm assembly disposed within the housing. The diaphragm assembly acoustically divides the housing into a front volume and a back volume. The diaphragm assembly c... | 09/05/2006 |
| 7050600 | Speaker system, mobile terminal device, and electronic device A speaker system includes a display panel for displaying an image; a transparent panel provided such that the image displayed in the display panel is viewed through the transparent panel; an electric-mechanical-acoustic-transducer having a diaphragm for outputting a... | 05/23/2006 |
| 7027609 | Diaphragm for speakers A diaphragm for a speaker comprises a metal cone 2 and a paper auxiliary cone 4 bonded integrally to the center portion of the metal cone 2. ... | 04/11/2006 |
| 6963651 | Single magnetic circuit dual output speaker The present invention discloses an improved single magnetic circuit dual output speaker, comprising a support retainer with an expanded opening at its front end, a bridge disposed across the opening, a magnetic circuit wound and fixed inwardly in the middle of the b... | 11/08/2005 |
| 6963650 | Coaxial speaker with step-down ledge to eliminate sound wave distortions and time delay A coaxial speaker assembly (10) with reduced sound distortion, sound time delay, and polar response distortion. The coaxial speaker assembly (10) includes a high-frequency speaker system (16) mounted coaxially with and fitting within a lower-fre... | 11/08/2005 |
| 6862361 | Audio speaker An audio speaker including a chassis and a diaphragm defining an axis. A suspension movably interconnects the diaphragm and the chassis for reciprocating movement of the diaphragm along the axis. A motor is operably connected to the diaphragm for powered movement th... | 03/01/2005 |
| 6751324 | Speaker device The present invention provides a speaker device in which assembly is easy, and which has high sensitivity and low distortion. The speaker device comprises a frame member, a piezoelectric element to which a sound signal is applied, a diaphragm attached to the piezoel... | 06/15/2004 |
| 6731773 | Dual basket speaker with replaceable, self-aligning cone assembly and super ventilated pole piece A speaker with a replaceable cone assembly. The motor assembly has its own basket, which is mounted in the enclosure. The cone assembly also has its own basket, which fits inside the motor basket. In the event of damage or malfunction in the cone or coil, the entire... | 05/04/2004 |
| 6644182 | Method of producing cone diaphragm having color patterns A method of producing cone diaphragm having color patterns includes steps of using a fiber-made thin sheet as a base material; printing the base material with a high molecular ink; soaking the printed base material in a high molecular resin material; or a... | 11/11/2003 |
| 6493452 | Speaker unit A speaker unit includes a woofer having a diaphragm with an ellipse shape sound emitting opening, and a separate speaker having an ellipse shape diaphragm with an area smaller than that of the diaphragm of the woofer, located in front of the diaphragm of ... | 12/10/2002 |
| 6445803 | Speaker The present invention relates to an improved speaker which includes at least one radiating surface configured to vibrate to produce sound waves, and an existing speaker cone configured to vibrate to produce sound waves, wherein said at least one radiating... | 09/03/2002 |
| 6330340 | Loudspeaker with a diaphragm having integral vent bores A loudspeaker is provided including a diaphragm having a lower end formed with an inner surface mounted to the voice coil former, an outer surface spaced from the inner surface and a number of circumferentially-spaced vent bores formed between the inner a... | 12/11/2001 |
| 6095280 | Concentric tube suspension system for loudspeakers A concentric tube suspension system and loudspeaker system of the moving coil type, including a diaphragm supported by a frame, a voice coil including a former and voice coil winding supported by the former, and a suspension system for stabilizing and cen... | 08/01/2000 |
| 5933512 | Double cone-type loudspeaker A double cone-type loudspeaker which comprises a subcone made of highly heat-conductive material, attached to the front of the main cone and to a voice coil bobbin made of highly heat-conductive material. Heat generated in the coil portion of the voice co... | 08/03/1999 |
| 5748759 | Loud speaker structure Disclosed is a loudspeaker apparatus having at least one support surface provided therein adjacent to a complaint surround for providing lateral support thereto, the surround mounting the diaphragm of the speaker to a speaker frame for permitting longitud... | 05/05/1998 |
| 5748760 | Dual coil drive with multipurpose housing An improved electromagnetic transducer able to produce more power per mass than a conventional transducer. This increased power per mass is made possible by combining a properly designed housing, a neodymium magnet and a dual coil structure. This design d... | 05/05/1998 |
| 5734734 | Audio voice coil adaptor ring A voice coil adaptor ring and loudspeaker system of the moving coil type including a cone diaphragm supported by a frame, a voice coil former for supporting a voice coil, and a lower suspension for securing and centering the voice coil former in a magneti... | 03/31/1998 |
| 5734132 | Concentric tube suspension system for loudspeakers A concentric tube suspension system and loudspeaker system of the moving coil type, including a diaphragm supported by a frame, a voice coil including a former and voice coil winding supported by the former, and a suspension system for stabilizing and cen... | 03/31/1998 |
| 5721786 | Loudspeakers An improved loudspeaker comprises an oscillator fitted to an enclosure and able to oscillate to create sound waves. The oscillator, which includes a diaphragm, may be driven in response to an electromagnetic force or passively in response to pressures in ... | 02/24/1998 |
| 5719946 | Loudspeaker for higher audio frequencies and a manufacturing method thereof A loudspeaker has a first diaphragm having a domed shape, a second diaphragm formed on a periphery of the first diaphragm, and a voice coil provided at a juncture of the first and second diaphragms. The second diaphragm is designed such that a dip frequen... | 02/17/1998 |
| 5715324 | Speaker having magnetic circuit A speaker in which the inner peripheral face of a ring-shaped soft ferrite core is cemented to a cylindrical projection extending from a lower portion of a bowl-shaped frame. An outer peripheral surface of a co-axially disposed ring-shaped bond magnet is ... | 02/03/1998 |
| 5687247 | Surround for a loudspeaker An improved surround design for a loudspeaker assembly is disclosed wherein the outside edge of the surround is attached to the outer edge of the loudspeaker's frame via a permanent or removable means. When removably attached, access to the mounting holes... | 11/11/1997 |
| 5647007 | Optimized sound components for hair dryer stereo system A bonnet style hair dryer includes integral left and right speakers. Each of the speakers is positioned proximate a respective ear of the user when the bonnet is placed over the user's head. A stereo audio cable is connected to the speakers with the oppos... | 07/08/1997 |
| 5625701 | Loudspeaker diaphragm attaching A loudspeaker includes a diaphragm having a neck with an annular edge, a voice-coil former having an annular edge and a spider. There is structure formed with an annular groove. The annular edge of the neck and the annular edge of the voice-coil former ar... | 04/29/1997 |
| 5602931 | Connection line According to the invention, a contact for loudspeakers (10) is indicated between the wire ends (24) of voice coil (16) and the stationary contacts (19), which is temperature-stable even above 250° C. This is achieved by first conductively connecting the ... | 02/11/1997 |
| 5594805 | Loudspeaker A loudspeaker capable of improving the efficiency, providing a high performance, and reducing its weight. In a general loudspeaker or a loudspeaker having a repulsion magnetic field type magnetic circuit, the whole or part of the voice coil 1 uses a compo... | 01/14/1997 |
