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| Number | Title | Issue Date |
| 7463744 | Porting A ported electroacoustical device uses the action of the port to provide cooling airflow across a heat producing device. The device includes a loudspeaker enclosure including a first acoustic port, and an acoustic driver, mounted in the loudspeaker enclosure. The de... | 12/09/2008 |
| 7454025 | Loudspeaker with internal negative stiffness mechanism In a loudspeaker device of the present invention, an interior space of a cabinet is parted into first and second chambers, a diaphragm on which ring-shaped magnetic boards are fixed is attached to a parting board via an edge portion, and ring-shaped fixed magnets ar... | 11/18/2008 |
| 7352873 | Electret-condenser microphone An electret-condenser microphone according to the present invention includes a vibrating diaphragm and a back electrode which compose a condenser; a cylindrical case which houses the vibrating diaphragm and the back electrode; a circuit board which is housed in an o... | 04/01/2008 |
| 7331215 | Deployment of equipment into fluid containers and conduits Apparatus for deploying equipment in a fluid container or fluid conduit comprises a fluid housing having an outlet aperture, the fluid housing being adapted to be secured to the container or conduit such that the outlet aperture is in fluid communication with an ape... | 02/19/2008 |
| 7149894 | Public-key certificate issuance request processing system and public-key certificate issuance request processing method Provided is a structure enabling dispersion of a load that is incurred by a public key certificate issuer authority or a registration authority. The structure has an issuer authority that issues a public key certificate and registration authorities each of which rec... | 12/12/2006 |
| 6914996 | Portable telephone attachment for person hard of hearing The purpose is to provide a cellular phone attachment for a hearing-impaired person. The attachment is adapted to be used as a hearing aid for catching a voice sound issued from the conversation partners when the hearing-impaired person makes conversation to his or ... | 07/05/2005 |
| 6807284 | Speaker and speaker device A speaker has a very small size and is arranged to emit sound waves in a non-directional manner. The speaker includes a case and a speaker unit attached to a plate provided at an opening of the case. The speaker is arranged so that the speaker unit is mounted or att... | 10/19/2004 |
| 6751329 | Loudspeaker driver A drive module for attachment to a rigid panel and adapted to apply bending wave energy at audio frequencies to the panel whereby the panel can radiate an audio output. The drive module has a housing adapted to be secured to the panel, at least one foot on the housi... | 06/15/2004 |
| 6748090 | Multi-mode radiator panels The invention relates to a system with multi-mode radiator panels used to reproduce sound. The multi-mode radiator panels include at least one driver, a core layer and two cover layers connected to the core layer. The panels are typically mounted in a frame with att... | 06/08/2004 |
| 6430297 | Speaker and speaker device A speaker has a very small size and is arranged to emit sound waves in a non-directional manner. The speaker includes a case and a speaker unit attached to a plate provided at an opening of the case. The speaker is arranged so that the speaker unit is mou... | 08/06/2002 |
| 6408080 | Boundary layer microphone A microphone may use boundary layer technology in concert with a concave reflector to produce improved sensitivity. The concave reflector may be arranged with respect to a boundary layer creating surface such that the sound waves are concentrated at the b... | 06/18/2002 |
| 6198831 | Panel-form loudspeakers A panel form loudspeaker/microphone combination has a distributed resonant bending wave member and two transducers mounred on the member at sites where the number of vibrationally active resonance anti-nodes is relatively high. One transducer is capable o... | 03/06/2001 |
| 5995635 | Sound pickup and amplifier apparatus for vibrating strings An apparatus to pick up and amplify sounds created by vibrations of a flexible member having a base which supports a sound pick up that transmits a signal to an amplifier. The apparatus is attached to the flexible member by an attachment assembly mounted ... | 11/30/1999 |
| 5351220 | Moving-coil electrodynamic electroacoustical transducer The present invention involves a moving-coil electrodynamic electroacoustical transducer, comprising a disk made of a hard, nonmagnetic material (12), which is superimposed on the diaphragm (11) and has openings for the output of sound, a power-factor-imp... | 09/27/1994 |
| 4864611 | Telephone handset attachment for use in-the-ear hearing aids An attachment for a telephone handset used by users of in-the-ear hearing aids including a cup shaped member which acoustically couples the handset to the ear and serves to cancel feedback between the hearing aid receiver and microphone.... | 09/05/1989 |
| 4837833 | Microphone with frequency pre-emphasis channel plate A high frequency emphasis microphone particularly adapted to a hearing aid application provides a steeply rising frequency response characteristic relative to frequency, and has a low pass sonic attenuator for providing to the undriven side of the microph... | 06/06/1989 |
| 4805221 | Construction of sound converter in sound guide, especially for loudspeakers, for example speaker boxes An installation of sound converters (e.g., speakers) in an enclosure having mechanical fasteners such that the transmission of solid-borne sound from the speakers to the enclosure is prevented.... | 02/14/1989 |
| 4777650 | Dual cavity pressure microphones A dual cavity pressure microphone comprising a microphone housing and an oscillating element mounted in or on said housing. The oscillating element including a membrane which is in principle only sensitive to a sound field on one side, the second side for... | 10/11/1988 |
| 4547631 | Large-excursion electroacoustic transducer An electroacoustic transducer comprises a diaphragm (1), a magnet system (4) and a voice coil (3) arranged on a voice-coil former (2) in an air gap (5) of the magnet system. The movement is transmitted between the voice-coil former and the diaphragm via a... | 10/15/1985 |
| 4309576 | Listening device for localizing underground water leakages A listening device for pinpointing water leakages, which includes a manually operated rod having a handle at one end for manually positioning of the listening device. An acoustic pick-up apparatus is mounted on the other end of the rod, and it comprises a... | 01/05/1982 |
