Abstract: A modular horn type loudspeaker and a modular horn array formed of modular loudspeakers. An acoustic horn includes a first acoustic module. The first acoustic module includes a first acoustic driver and a first acoustic duct, for conducting acoustic energy from the first acoustic driver. The first acoustic duct has a first opening through which acoustic energy is radiated. The first acoustic duct is characterized by a first centerline. A second acoustic module includes a second acoustic driver and a second acoustic duct, for conducting acoustic energy from the acoustic driver. The second acoustic duct has a second opening through which acoustic energy is radiated. The second acoustic duct is characterized by a second centerline.

Abstract: Embodiments are provided for configurations of a loudspeaker and assembly of the loudspeaker. The loudspeaker configuration may include a circumferential spacer element having a first surface and a second surface. The first surface may be attached to an outer rim of a first suspension element. An inner rim of the first suspension element may be attached to an outer rim of a diaphragm. A central portion of the diaphragm may be coupled to a voice coil. The second surface may be attached to an outer rim of a second suspension element. An inner rim of the second suspension element may be coupled to a lower surface of the diaphragm. The circumferential spacer element has a structural shape configured to be coupled to a loudspeaker frame such that the voice coil may be suspended at least partially within a magnetic gap of a magnetic structure of the loudspeaker.

Abstract: A diaphragm for an audio speaker includes an outer shell and an inner shell. Each shell has a face portion and an edge portion that is formed to be substantially perpendicular to the face portion. The inner shell is inserted into the outer shell such that at least a part of the edge portion of each shell is in contact with at least a part of the edge portion of the other shell and a space is formed between the face portions of each shell. A cellular core fills the space formed between the face portions of each shell and is bonded to the face portion of each shell. The outer and inner shells may have identical sizes and shapes such that there is an interference fit between the contacting edge portions. A voice coil may be supported by the edge portions.

Abstract: A method of making a nonfluoropolymer electret film is provided. The method may include: providing a polymer-containing solution, the polymer-containing solution comprising at least one polymer material, at least one solvent, and at least one surfactant, spreading the polymer-containing solution to provide a wetting polymer film, removing at least a portion of the solvent in the wetting polymer film to provide a polymer film, and conducting a Corona charging to the polymer film to form the electret film.

Abstract: A miniature speaker is describer including a microphone holder and a vibrator holder. A miniature speaker matching the oval shape of a sound chamber is placed face down over the sound chamber. A small slot is formed in one of the sides of the sound chamber to provide a sound portal through which the speaker generated sound is heard. The platform on which the sound chamber is formed also comprises a microphone holder and a vibrator holder. The microphone holder is positioned such that a sound receiving portal of the microphone is orthogonal to the sound portal formed in one of the side walls of the sound chamber.

Abstract: A microphone unit includes: a housing which has an inner space; a partition member which is provided in the housing and divides the inner space into a first space and a second space, the partition member being at least partially formed of a diaphragm; and an electrical signal output circuit which outputs an electrical signal based on vibrations of the diaphragm. In the housing, a first through-hole through which the first space communicates with an outer space of the housing and a second through-hole through which the second space communicates with the outer space are formed.

Abstract: A speaker is integrally formed with a multi-layered printed circuit board. The printed circuit board includes a flexible membrane layer with a conductive pattern thereon. Positive and negative elements are disposed on opposing sides of the flexible membrane. A drive circuit connects to the flexible membrane layer and applies current to the flexible membrane layer responsive to an audio signal to generate audible sounds.

Abstract: A speaker device has a diaphragm, a static part vibratably supporting the diaphragm in a vibration direction and a driving part applying vibration to the diaphragm in response to an audio signal. The driving part is provided at the static part. The driving part includes a magnetic circuit forming a magnetic gap in a direction different from the vibration direction of the diaphragm, a voice coil vibrating along the magnetic gap, and a vibration direction converter part direction-converting the vibration of the voice coil and transmitting the vibration to the diaphragm. The vibration direction converter part includes a link body angle-converting a link part formed between the voice coil and the diaphragm. The static part includes an outer peripheral frame part surrounding the diaphragm and a bridge part bridging the inside of the outer peripheral frame part.

Abstract: A speaker device which can form an ideal cylindrical wave as sound traveling nondirectionally in a horizontal direction toward a listener. A vibration transmitting member is supported at one end thereof to the vertex of a conical diaphragm, and vibration generated by a vibrating element according to an acoustic signal is applied to the other end of the vibration transmitting member. The angle ? between the perpendicular dropped from the vertex of the conical diaphragm to the base thereof and the side surface of the conical diaphragm is set according to the sound velocity in the air and the sound velocity in the conical diaphragm so that the distance traveled by a sound radiated from the vertex is equal to the distance traveled by a sound radiated from an end of the side surface of the conical diaphragm farthest from the vertex.

Abstract: A microphone has a membrane (20) mounted to vibrate in response to pressure fluctuations, a backplate (30) facing the membrane and being more rigid than the membrane, and circuitry (95) for sensing the vibrations relative to the backplate, the backplate being prestressed and having a geometry such that a response of the backplate to structure borne vibration matches a corresponding response of the membrane. This can help reduce or minimize relative movement between these surfaces caused by structure borne vibration and hence improve the signal-to-noise ratio of the microphone. The geometry can be a hub and spoke arrangement.

Abstract: A method and apparatus for providing a loudspeaker assembly is provided. In accordance with at least one embodiment, a method is provided which comprises forming a loudspeaker frame so as to define a driver housing portion, a horn portion, and a conformal portion. A driver aperture is defined for the driver housing portion, and a port aperture is defined for the horn portion. A driver is attached to the loudspeaker frame proximate to the driver aperture. A rear baffle is applied to a first conformal portion surface of the conformal portion of the loudspeaker frame. The rear baffle defines a horn cavity wall of a horn cavity of the horn portion. The horn cavity has an increasing cross sectional area as the distance from the driver housing portion increases. A grille is applied to a second conformal portion surface of the conformal portion of the loudspeaker frame.

Abstract: A method for personalizing a stethoscope, wherein the personalization permanently identifies the owner of the stethoscope and also decorates the stethoscope. The personalization does not deter from the normal operation of the stethoscope, and allows for full sterilization of the stethoscope. The diaphragm of the stethoscope, includes an exterior side that is adapted to come into contact with the patient and, an interior side that is not exposed to the outside. A design selected by the owner is applied, in reverse, to the interior surface of the diaphragm. The design is preferably painted on the diaphragm in stages, or layers. Using the present reverse application technique, images painted on the right-half of the interior surface, appear on the left-half, when viewed from the exterior of the stethoscope. Further, in the present application technique, the foreground is painted on, or applied, first, and the background of the personalization is applied last.

Abstract: A compound membrane (100) for an acoustic device (200), the compound membrane (100) comprising a first layer (101) and a second layer (102), wherein a value of Young's modulus of the second layer (102) does not vary more than essentially 30% in a temperature range between essentially ?20° C. and essentially +85° C.

Abstract: A holding device for an ultrasonic transformer having a diaphragm cup, in particular for a motor vehicle, includes the following: a housing to accommodate the diaphragm cup; a decoupling component to position the diaphragm cup on the housing and on a holding section in vibration-damped manner; and a filler material to connect the diaphragm cup and the decoupling component to the housing in a vibration-damped and sealing, form-fitting manner, the decoupling component sealingly filling a gap between an edge of an opening of the housing and the diaphragm cup, as well as a corresponding method.

Abstract: A speaker is integrally formed with a multi-layered printed circuit board. The printed circuit board includes a flexible membrane layer with a conductive pattern thereon. Positive and negative elements are disposed on opposing sides of the flexible membrane. A drive circuit connects to the flexible membrane layer and applies current to the flexible membrane layer responsive to an audio signal to generate audible sounds.

Abstract: A diaphragm structure (10) includes an oscillating diaphragm (11) and a strengthening member (13) superposed on and surrounding a periphery of the oscillating diaphragm. The strengthening member is hot-pressed on the periphery of the oscillating diaphragm. The strengthening member has a higher melting temperature than that of the oscillating diaphragm, and the strengthening member and the oscillating diaphragm are cooled after they are heat-pressed in a mold to thereby obtain residual stress in the oscillating diaphragm.

Abstract: A vibrating element (1) for an electroacoustic transducer, particularly for a loudspeaker, is provided, comprising a diaphragm (2) with at least two electrically conductive areas (3a, 3b) separated from each other, and with a recess (4). In the recess (4) a coil (5) is arranged with two connecting leads (6a, 6b), which are electrically contacted with one conductive area each (3a, 3b). The contact points (8a . . . 8d) are then located in the area of the recess (4). Furthermore, a method for the manufacturing of a vibrating element (1) is provided. The recess (4), the inserting of the coil (5) into the recess (4) as well as optionally the contacting of connecting leads (6a, 6b) with the conductive areas (3a, 3b) can then take place in one process step.

Abstract: This invention provides a two-stage phasing plug located within a compression driver. The two-stage phasing plug housed within the compression driver may be coupled to a horn. The two-stage phasing plug includes first and second phasing plugs. The advantages of having a two-stage phasing plug is that the first and second phasing plugs may be simpler to manufacture, cost less and the overall dimensional tolerances may be tightly controlled. The higher dimensional tolerances may be obtained because the first phasing plug may be made from a unitary work-piece, and therefore, may be tooled and cut in the same machining set up. This allows the unitary work-piece to be machined and cut very accurately when compared to assembling separate components together during the manufacturing process. Since the most dimensionally critical area is the rear side of the first phasing plug, the tolerances of the second phasing plug may not be as critical.

Abstract: A linkage assembly (140) is used for mechanically coupling an armature (124) and a diaphragm (118) of a balanced receiver (100), the linkage assembly (140) formed from a first linkage member (822) displaced from a strip of stock material (800) relative to the plane of the stock material (800) and a second linkage member (826) displaced from the strip (800) relative to the plane. The first and second linkage members (822, 826) are then joined while secured to the strip (800). At least one severable connecting member (870a-c) securing the linkage member to the strip (800) is severed to release the linkage member from the strip for assembly of the linkage member into the receiver. A method of forming a three-dimensional structure from flat stock is used to form the linkage assembly (140).