Abstract: A tweeter with a light, thin sandwich plate which can be excited into multiple reflected bending waves, and a driver which makes a vibrating contact and excites the sandwich plate, where the driver is designed for higher sound frequencies and the sandwich plate for propagating bending waves with low damping. The sandwich plate is freely carried with low damping by holding elements, where the latter are designed to be low damping at higher sound frequencies.

Abstract: A piezoelectric electroacoustic transducer includes a substantially rectangular piezoelectric diaphragm having an internal electrode, a plurality of laminated piezoelectric ceramic layers having the internal electrode interposed between two of the piezoelectric ceramic layers, principal-surface electrodes disposed on top and bottom principal surfaces of the piezoelectric diaphragm, the piezoelectric diaphragm generating surface bending-vibrations in response to application of an alternating signal between the principal-surface electrodes and the internal electrode, a resin film that is larger than the piezoelectric diaphragm and having the piezoelectric diaphragm affixed onto substantially a central portion of a front surface thereof, and a housing having a support for supporting the outer periphery of the resin film.

Abstract: A hearing compensation system for the hearing impaired comprises a plurality of bandpass filters having an input connected to an input transducer and each bandpass filter having an output connected to the input of one of a plurality of multiplicative AGC circuits whose outputs are summed together and connected to the input of an output transducer. The multiplicative AGC circuits attenuate acoustic signals having a constant background level without the loss of speech intelligibility. The identification of the background noise portion of the acoustic signal is made by the constancy of the envelope of the input signal in each of the several frequency bands. The background noise that will be suppressed includes multi-talker speech babble, fan noise, feedback whistle, florescent light hum, and white noise.

Abstract: The present invention discloses a method and apparatus for hands free communication using a PDA. The method includes sensing a bone conduction signal from the bone conduction sensor disposed within an external auditory cannel of the user, transmitting the sensed bone conduction signal from a transmitter to a PDA, and processing the sensed bone conduction signal at the PDA to create a processed audio signal.

Abstract: A loudspeaker has a magnetic flux assembly that has a pole piece and a plate and magnet structure for co-operating with a voice coil. The plate structure includes a top plate which is mounted adjacent to the diaphragm assembly of the loudspeaker. There is a cavity within the voice coil and between the diaphragm membrane and the top of the pole piece. A fluid flow passage is provide to permit air displaced to and from the cavity during movement of the diaphragm assembly to flow through the top plate and to encourage cooling of the assembly.

Abstract: A speaker system is provided which includes a sound box and a speaker mounted in the sound box. The sound box is divided into a plurality of air chambers, each of which is formed with at least an air dissipating hole connecting the atmosphere of the box and at least an air passing hole connecting at least a neighboring air chamber, so as to generate behind the speaker pressurized air cushions corresponding to each frequency band of the frequency response of the speaker. Meanwhile, upon reaching the air dissipating hole of each air chamber the air cushions are generated depressurized and vanished at an appropriate timing so that formerly air cushions do not interfere with those generated in succession; therefore each frequency band of the frequency response of the speaker is provided with an appropriate and independent pressurized air cushion so that high fidelity sound frequencies can be reproduced.

Abstract: Programmable echo cancellation filter for echo signal cancellation for a transceiver having a signal input (13) for receiving the transmission signal emitted by the transceiver (1), an input resistor (36) connected to the signal input (13), an operational amplifier (39), whose signal input (38) is connected to the input resistor (36) and whose signal output (41) is connected to an output resistor (43), a first programmable resistor circuit (48), which is provided between the signal output (41) of the operational amplifier (39) and the signal input (38) of the operational amplifier, a second programmable resistor circuit (51), which is provided between the output resistor (43) and a signal output (15) of the echo cancellation filter (14), a third programmable resistor circuit (55) which is provided between the first programmable resistor circuit (48) and the signal output (15) of the echo cancellation filter (14), the programmable resistor circuits (48, 51, 55) each having a plurality of resistors (65) which a

Abstract: A transducer module for integration into a hearing aid device. The transducer module has an encapsulation with an opening and a transducer housing resiliently mounted in the encapsulation. The transducer module also has a first membrane and a second membrane. The first membrane forms a first space adjacent to a first side of the membrane which communicates with the opening. The first membrane also forms a second space adjacent to a second side of the first membrane which communicates with an intermediate space between the transducer housing and the encapsulation. The second membrane is for closing the opening of the encapsulation. Further, the transducer forms a self-contained module with the encapsulation as a housing of the module, with the module being adapted for insertion into the hearing device.

Abstract: A loud speaker enclosure being made in two parts with each of the side panels cut into angle form to assist in angle adjustment, alone with pivot hinges and friction lid supports used to hold it's angled position. The enclosure can be modified to accommodate any design or style of drivers boards. In addition to any design of loudspeaker, any orientation of enclosing may be incorporated with this invention. This enclosure can be used without driver board 5B were by Box B would then operate as an angling base for Box T.

Abstract: A speaker includes a housing having a diffusion opening provided with a laser vibration diaphragm. The laser vibration diaphragm has reflective spatial patterns, so that the speaker may present multiple-image variations under different rays of light, thereby enhancing a viewing effect and aesthetic quality of the speaker. Thus, the laser vibration diaphragm may produce spatial variations by the difference of incident angles of the light, thereby obtaining a viewable strong sensation to the people, and thereby enhancing the viewing effect and aesthetic quality of the speaker.

Abstract: A speaker assembly a speaker assembly that is readily mounted and dismounted from a mounting bar, and which also achieves reliable electrical connection in the same mounting connection. To mount the speaker, one pulls a plunger pin out, inserts a mounting boss into a swivel mount, and releases the plunger pin to lock the speaker onto the swivel mount. This action also inserts a jack into a receptacle, and completes the electrical connection of the speaker to the music source. The speaker is then rotated to the desired position and fixed in place by tightening a thumb screw.

Abstract: A speaker has a frame provided with a yoke, a magnet, a vibrating plate and a voice coil, and a pair of leads. An end of each of the leads is connected to an end of the coil and the other end portion of the lead is exposed in a hole formed in the frame and secured to the frame so as to be connected to an outside terminal. A terminal connecting device is provided for connecting the other end of the lead to the outside terminal. The terminal connecting device comprises a cylindrical case secured in the hole of the frame, a connecting rod slidably mounted in the cylindrical case, and a coil spring provided in the cylindrical case to outwardly urge the connecting rod so as to be contacted with the outside terminal at an end of the rod. A top end of the cylindrical case is contacted with the end portion of the lead.

Abstract: An information processing device and a speaker unit applicable to the device. In one aspect of the present invention, the device includes a housing, a pole piece, a voice coil, a magnet, and a frame. The housing has an elastically vibratory vibration region. The pole piece has a first end and a second end. The first end is fixed to the vibration region of the housing. The voice coil is fixed to the second end of the pole piece. The magnet forms a magnetic field interlinking the voice coil. The frame fixes the magnet to the housing at a region other than the vibration region, for example. With this configuration, vibration of the voice coil due to a current flowing through the voice coil is transmitted through the pole piece to the vibration region of the housing, thus eliminating the need for a vibration board of a speaker and further eliminating the need for formation of holes for sound transmission through the housing.

Abstract: A portable device includes a speaker with an active vent fed by a front of a speaker diaphragm and a larger passive vent fed by a rear of the speaker diaphragm. The outputs of the active and passive vents are acoustically coupled to respective active and passive ports, coupled together outside of the housing within an ear placement region for a user of the portable electronic device to obtain a more uniform frequency response from the speaker configuration over a larger region of a user's ear placement possibilities than would be available with the active vent alone. This is accomplished by a close acoustic coupling of the ports in combination with diverse porting of active and passive acoustic signals. The passive path also serves to relieve pressure near a user's ear to improve signal quality.

Abstract: In a method for detecting and/or removing errors in the transmission and storage of data in a digital hearing device and a digital hearing device operating according to the method, an internal check of transmitted and stored data occurs within the hearing device itself. The digital hearing device has an input transducer, an output transducer, a processor and a program memory, with a checking element for internal checking of transmitted and stored data within the hearing device, being connected at least to the program memory and the processor.

Abstract: A waveguide system for radiating sound waves. The system includes a low loss waveguide for transmitting sound waves, having walls are tapered so that said crosssectional area of the exit end is less than the cross-sectional area of the inlet end. In a second aspect of the invention, a waveguide for radiating sound waves, has segments of length approximately equal to A ⁡ ( y ) = A inlet ⁡ [ 1 - 2 ⁢ Y B + ( Y B ) 2 ] where l is the effective length of said waveguide and n is a positive integer.

Abstract: Vibration from a hearing aid receiver (and mechanical shock caused by dropping the hearing aid in which it is installed) is damped by a low-durometer elastomeric component that is adhered external to the receiver. The component may be filled with an electrically nonconductive viscous liquid. The component may also be a solid bead or may be provided with a multiplicity of outwardly-extending flexible fingers.

Abstract: Speaker system for a display including a cover frame integrated type speaker 1 having a cover frame 101 with screw holes 106 for assembly with a rear cover 2 at top and bottom thereof and a speaker 100 for emitting sound integrated with the cover frame 101, a rear cover 2 fastened to a rear of the cover frame integrated type speaker 1 having a vibration attenuation member mounting unit 200 provided on top and bottom thereof, and vibration attenuation means disposed between the cover frame integrated type speaker 1 and the cabinet for attenuating a system vibration to prevent transmission of the system vibration to the cabinet 4, whereby saving cost, improving a productivity, preventing a pressure loss of a sound directed forward caused by a leaked sound directed backward, and attenuating a system vibration from the speaker so as not to reach to the cabinet, to provide a speaker of a high sound quality and a low howling.

Abstract: The present invention provides a Dracula clip type of microphone holder, which enables further increase in the safe mounting during sticking or drawing of the pins on clothes of its wearer. The improved microphone holder comprises at least one microphone, a holder base member having front and back faces, a holder device slidably mounted on the front face of the holder base member for holding the microphone, and a hook pin having pin(s) on the side of the back face of the holder base member, the hook pin being rotatably supported at the approximate proximal end of the holder base member, in the direction of crossing the front or back face of the holder base member, such that the pins are extended from or retracted to the back face of the holder base member through slid movement of the holder device on the front face of the holder base member.

Abstract: The invention discloses an improved bone conduction sensor capable of use within a voice sound transmitting apparatus. The bone conduction sensor is adapted for placement in the external auditory canal of the user in a nonocclusive fashion. The bone conduction sensor has a contoured surface adapted-to fit against a wall of the external auditory canal increasing the surface area contact between the bone conduction sensor and the wall of the external auditory canal. The bone conduction sensor may also be associated with one or more contact sensors adjacent the bone conduction sensor for determining contact between the bone conduction sensor and the wall of the external auditory canal. In addition, the invention provides for the bone sensing element to be separated from the circuit portion of the bone conduction sensor so that the circuitry may be removed to the behind the ear portion of the earpiece.