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"That’s an amazing invention, but who would ever want to use one of them?"
President Rutherford B. Hayes ; Said in 1876, after Alexander Graham Bell demonstrated the telephone to him at the White House
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| Number | Title | Issue Date |
| 8433089 | Voice input apparatus A microphone unit is disposed in the inside of a first housing of a voice input apparatus. The microphone unit includes: a second housing; a diaphragm which is disposed in the inside of the second housing; and an electric circuit portion which processes an electric ... | 04/30/2013 |
| 8358798 | Passive directional acoustic radiating An acoustic apparatus, including an acoustic driver, acoustically coupled to a pipe to radiate acoustic energy into the pipe. The pipe includes an elongated opening along at least a portion of the length of the pipe through which acoustic energy is radiated to the e... | 01/22/2013 |
| 8036411 | Portable communication tool There are provided a speaker for outputting sound, a plurality of sound output holes formed in a reverse side cabinet, a mesh sheet, a two-sided tape, and a transparent sheet. The sound output holes, the mesh sheet, the two-sided tape, and the transparent sheet cont... | 10/11/2011 |
| 7912238 | Speaker attenuation system, method and apparatus A speaker attenuation system includes an attenuating member comprised of suitable material and having a size and a shape capable of attenuating a speaker when positioned in a central beam region of the speaker. A positioning mechanism is capable of positioning the a... | 03/22/2011 |
| 7440580 | Room mode bass absorption through combined diaphragmatic and helmholtz resonance techniques An acoustical bass absorber which reduces peak and dip frequency response errors caused by interference from naturally occurring axial standing waves in rectangular rooms. The apparatus uses two forms of simple harmonic resonance: pistonic diaphragm resonance and He... | 10/21/2008 |
| 7269270 | Standing wave reducing The frequency at which standing waves occur in a loudspeaker enclosure may be reduced by the addition of an internal barrier to the enclosure in order to lengthen the effective length of an internal dimension of the enclosure. Additionally, the internal barrier may ... | 09/11/2007 |
| 7254239 | Sound system and method of sound reproduction A sound reproduction system comprises a left and right speakers located in close proximity, and a sound processor which provides audio signals to the pair of speakers. The sound processor preferably derives a cancellation signal from the difference between the left ... | 08/07/2007 |
| 7203528 | Mobile phone with a connector capable of assembling both a microphone and a coin battery A mobile phone has a circuit board and a connector capable of assembling both a microphone and a coin battery. The connector includes an insulative body having a first engaging sink for positioning the microphone and a second engaging sink for positioning the coin b... | 04/10/2007 |
| 7123735 | Method and apparatus to increase acoustic separation A method and apparatus for reducing the acoustic coupling between a sound receiving transducer and a sound transmitting transducer is disclosed. A housing, wherein the receiving transducer and the transmitting transducer are mounted, is provided to increase the acou... | 10/17/2006 |
| 7111706 | Enclosure and audio-visual apparatus comprising same The acoustic enclosure comprises a box, on which is mounted at least one electro-acoustic transducer, and a vent which together with the box produces a bass-reflex system with a specified bass-reflex resonant frequency. The vent comprises means of attenuation at the... | 09/26/2006 |
| 7110536 | Acoustic seal system An acoustic seal system (100). The system (100) includes a flexible sealing element (110) having a ridge (134) for engaging a cover (118) with a sealing interference fit, a plate (112) in which the flexible sealing element (... | 09/19/2006 |
| 7093688 | Structure for preventing the generation of standing waves and a method for implementing the same A speaker assembly includes a speaker mounted within a housing having a front plate and a base plate. The speaker is inclined with respect to the front plate. The base plate includes one of an inclined type structure, a convex type structure, a radial rib type struc... | 08/22/2006 |
| 7035086 | Removable storage of speakers within cavities of electronic device housing An electronic device of an embodiment of the invention is disclosed that includes a housing and an electronic mechanism. The housing has one or more cavities for removably storing speakers, which are intended for non-use when stored in the cavities. The electronic m... | 04/25/2006 |
| 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 |
| 6993147 | Low cost broad range loudspeaker and system A loudspeaker has a diaphragm with a voice coil disposed about its perimeter and extending in a gap into which the flux of an annular rare earth magnet is focused. An opening behind the diaphragm communicates through the speaker frame. The voice coil may have two or... | 01/31/2006 |
| 6955241 | Speaker unit for low frequency reproduction The invention provides a speaker unit for low frequency reproduction wherein distortion is reduced and the orientation of a sound image of the lower side frequency region is augmented. To that end, the phase characteristic in an actually used frequency band is made ... | 10/18/2005 |
| 6912290 | Speaker unit for low frequency reproduction The invention provides a speaker unit for low frequency reproduction wherein distortion is reduced and the orientation of a sound image of the lower side frequency region is augmented. To that end, the phase characteristic in an actually used frequency band is made ... | 06/28/2005 |
| 6751330 | Speaker system A driver unit is fixed to a stand. A front box and a rear box are directly fitted to the stand through a buffer material. A box comes into contact with the driver unit through a buffer material and is fixed to the stand. Therefore, sound of the driver unit is not tr... | 06/15/2004 |
| 6665413 | Infrasonic Helmholtz resonator An infrasonic Helmholtz resonator capable of producing clean sinusoidal frequencies in the range of 6-14 Hz is described.... | 12/16/2003 |
| 6658129 | Passive radiator having mass elements A passive radiator includes a chassis (11) and a radiator body which is connected to the chassis and which is movable with respect to the chassis along a translation axis (T*). The radiator is capable of displacing comparatively large air volumes. The rad... | 12/02/2003 |
| 6621910 | Method and arrangement for improving leak tolerance of an earpiece in a radio device The invention relates to an arrangement for improving leak tolerance in an earpiece (100) of a radio device. The invention can be applied preferably in mobile stations. One idea of the invention is that an acoustic volume (111) is arranged behind the earp... | 09/16/2003 |
| 6493456 | Thin speaker assemblies including laterally offset resonator cavities and personal electronic devices including the same A personal electronic device includes a main body and an ear flip member coupled to the main body. The ear flip member includes a speaker assembly. The speaker assembly includes a housing including front and rear opposed surfaces spaced apart along a dept... | 12/10/2002 |
| 6356643 | Electro-acoustic transducer An electro-acoustic transducer, such as a speaker device or an earphone device. Includes an electro-acoustic transducing unit, such as a speaker unit, for converting input electrical signals into sound, a casing in which the electro-acoustic transducing u... | 03/12/2002 |
| 5815589 | Push-pull transmission line loudspeaker A loudspeaker system having a multiple driver array arranged in a push-pull configuration is loaded into an acoustic transmission line ported to the outside of the loudspeaker enclosure. The transmission line is preferably tapered and is filled with acous... | 09/29/1998 |
| 5436976 | Omni-directional stereo speaker An omni-directional stereo speaker especially useful in high fidelity sound reproduction applications, comprised of a polyhedron speaker enclosure, separate speakers or drivers mounted in some or all of the faces of the polyhedron enclosure, an acoustical... | 07/25/1995 |
| 5369701 | Compact loudspeaker assembly A speakerphone comprises an upper housing member and a lower housing member that are joined together to enclose a loudspeaker, a microphone, and a printed wiring board having electronic components mounted thereon that cooperate in the operation of the spe... | 11/29/1994 |
| 5333204 | Speaker system A speaker system has a bass-reflex duct provided in a cabinet. A sub-duct is provided on a central portion of the bass-reflex duct. The sub-duct is communicated with the bass-reflex duct, and filled with sound absorbing material for absorbing unnecessary ... | 07/26/1994 |
| 5081674 | Double annular ring speaker gasket A double annular ring gasket (202) interfaces a speaker (201) to a housing (200) in a portable radiotelephone, providing a conformal and acoustic seal between the speaker (201) and the housing (200), and compensating for dimensional tolerance between the ... | 01/14/1992 |
| 4944019 | Low sound region reproducing speaker system A low sound region reproducing speaker system comprising a box, a partition separating the internal space of the box into two spatial portions, a pair of speakers attached to the partition wall, and an aperture formed in the side wall of the box through w... | 07/24/1990 |
| 4837837 | Loudspeaker The efficiency of a loudspeaker housing is substantially increased by incorporating in the housing, in the form of a lining or stuffing, a quantity of goat's hair, preferably mohair.... | 06/06/1989 |
| 4799264 | Speaker system A speaker system comprises a housing and at least one speaker mounted in said housing. An acoustical filter for intercepting and reradiating sound waves is mounted in front of the cone of the speaker. The acoustical filter includes a frame having a centra... | 01/17/1989 |
| 4665549 | Hybrid active silencer Acoustic attenuation apparatus (2) is provided for a duct (4) guiding an acoustic wave propagating (6) therethrough. A silencer (8) is provided for passively attenuating the acoustic wave in the duct, and a cancelling speaker (32) is provided within the s... | 05/12/1987 |
| 4638884 | Chambered headrest mounting for stereophonic loudspeakers A headrest hollow casing has a central vented chamber connecting end chambers in which stereophonic loudspeakers are mounted and such central chamber is loosely filled with batting or other sound-damping material. The casing is supported by mounting rods ... | 01/27/1987 |
| 4620317 | Tabletop speaker assembly A speaker assembly is disclosed for use on a desk or tabletop, in conjunction with a telecommunication or teleconferencing system. The assembly includes a speaker supported above a generally conical and circular base having one or more acoustically reflec... | 10/28/1986 |
| 4594478 | Transmitter assembly for a telephone handset A transmitter assembly for a telephone set uses a commercially available cartridge electric transmitter, by modifying the response curve. This is obtained by an adapter housing the transmitter with a first volume defined between the end of the transmitter... | 06/10/1986 |
| 4450930 | Microphone with stepped response A microphone, particularly for hearing aid application, said microphone providing a stepped response characteristic relative to frequency wherein low frequency sounds will couple to the associated hearing aid with a restricted amount of amplification, whi... | 05/29/1984 |
| 4379212 | Electro-acoustic transducer An electrical acoustical transducer is provided having a piezoelectrical layer in a housing with a transducer plate. The transducer plate divides the housing into a front chamber and a rear chamber. In the rear chamber, there is provided a Helmholtz reson... | 04/05/1983 |
| 4227051 | Loud speaker and enclosure system A loud speaker and enclosure system that has improved acoustical properties, comprises a cubical frame composed of two sidewalls, a top and a bottom, having an open front and back. The frame is made of substantially rigid material. The backwall is closed ... | 10/07/1980 |
| 4151378 | Electrostatic microphone with damping to improve omnidirectionality, flatten frequency response, reduce wind noise An electret microphone in which the condenser unit of the microphone is contained within a cylindrical shell open at one end and mounted coaxially on a larger cylindrical casing at the other, the region surrounding the shell and extending to the casing ha... | 04/24/1979 |
| 4129754 | Reporting device A hand-held reporting device for use in environments wherein a minimum of sound in connection with use of the device is a priority and in environments having a high level of noise intensity. The device includes a barrel with a bell-shaped top, the latter ... | 12/12/1978 |
