Abstract: A vehicle includes a horn assembly disposed behind a grille. The horn assembly includes a coil configured to generate a magnetic field in response to a current, a first diaphragm connected to a first plunger, a second diaphragm connected to a second plunger, and a spring. The spring is connected to the first and second plungers such that oscillation is transferred from the first diaphragm to the second diaphragm through the spring in response to the magnetic field from the coil.

Abstract: A mobile electronic device includes: a housing; an acoustic-component contained in the housing; a sound hole formed in the housing, the sound hole being configured to allow communication between an inside and an outside of the housing; a non-breathable waterproof film disposed inside the housing, the waterproof film being configured to cover the sound hole; a compressible member compressed by being pressed against the housing during assembly of the acoustic-component to the housing, the compressible member being configured to form an acoustic-component chamber together with at least the waterproof film, the acoustic-component chamber being configured to hermetically seal the acoustic-component; and an opening configured to allow communication between an inside and an outside of the acoustic-component chamber within the housing, the opening being configured to allow air in the acoustic-component chamber to escape to the outside before the opening is closed in the process of compressing the compressible member.

Abstract: An audio system comprising an electro-acoustic transducer having two stacked voice coils mechanically linked to a membrane. The voice coils are oscillatingly suspended in the magnetic field of a permanent magnet focused by a pole plate and are mechanically arranged symmetrical to the pole plate while in a rest position. The audio system further comprises two driver circuits connected to the electro-acoustic transducer.

Abstract: A heart rate detection apparatus includes a signal acquisition device for acquiring an intra-aural vibration wave signal and converting the intra-aural vibration wave signal into an intra-aural vibration electrical signal; and an arithmetic processing device for processing the intra-aural vibration electrical signal by computing to generate heart rate information. In the prior art, the heart rate detection apparatus cannot accurately and reliably detect the heart rate information due to the weak optical signal detected by a sensor. The heart rate detection apparatus acquires the intra-aural vibration wave signal to obtain the heart rate information, thus enabling the apparatus to accurately and reliably detect heart rate information.

Abstract: A general-purpose audio connector is provided. The audio connector includes an earphone plug that includes a plurality of first terminals, and an earphone connector that includes a plurality of second terminals. The earphone plug is configured to be inserted into and to connect to the earphone connector. The number of poles of the plurality of first terminals that connect to the plurality of second terminals is variable depending on a movement of the earphone plug.

Abstract: A microspeaker includes a frame, magnetic circuit, voice coil configured to generate vibration by mutual electromagnetic force with the magnetic circuit, vibration plate configured to vibrate together according to the vibration of the voice coil to generate a sound, and suspension configured to guide a vibration direction of the vibration plate and voice coil. The suspension has a central portion attached to the voice coil, an annular outer circumferential portion formed to be spaced apart from the central portion by a predetermined interval, and a connection portion connecting the central and outer circumferential portions and configured to perform a damping function. The central portion has an outer end having the same height as the connection and outer circumferential portions, an inner end positioned to be higher than the outer end, and a step portion connecting the outer end and inner end. The voice coil is attached to the inner end.

Abstract: An electroactive sound transducer foil includes a composite foil made up of at least one carrier foil, at least one first and one second electrode, and at least one piezoelectric layer including an electroactive polymer, the surface of the sound transducer foil including a structuring having different slopes, and the slope of the sound transducer foil surface changing the sign at least twice.

Abstract: A headphone driver includes a pre-main amplifier and a main amplifier. The pre-main amplifier receives an input signal from first and second node and outputs the input signal to a third node. The main amplifier is between the third node and a fourth node. A first switch is between the fourth node and a fifth node. A second switch is between the fourth node and a sixth node. A third switch is between the fourth node and a seventh node. A fourth switch is between the fifth and seventh nodes. A fifth switch is between the first and fifth nodes. A capacitor is between the third and fifth nodes. A first feedback resistor is between the first and seventh nodes. A second feedback resistor is between the second and sixth nodes, and the sixth and seventh nodes are connected to a speaker.

Abstract: A personal audio device, such as a wireless telephone, includes noise canceling that adaptively generates an anti-noise signal from a reference microphone signal and injects the anti-noise signal into the speaker or other transducer output to cause cancellation of ambient audio sounds. An error microphone is provided proximate the speaker to measure the output of the transducer in order to control the adaptation of the anti-noise signal and to estimate an electro-acoustical path from the noise canceling circuit through the transducer. The anti-noise signal is adaptively generated to minimize the ambient audio sounds at the error microphone. A processing circuit that performs the adaptive noise canceling (ANC) function also filters one or both of the reference and/or error microphone signals, to bias the adaptation of the adaptive filter in one or more frequency regions to alter a degree of the minimization of the ambient audio sounds at the error microphone.

Abstract: A miniature speaker and speaker cabinet are provided, wherein the speaker is enclosed in an oblong capsule with a sound output opening at one end and leads passing from a speaker coil inside the capsule to connection points externally on the capsule, and where the cabinet encloses the capsule and at one end thereof comprise a lead input opening with leads passing there through to the connection points on the capsule, and where the cabinet further comprise a sound exit opening opposite the lead input opening, which is in fluid communication with the sound output opening of the capsule, wherein the cabinet has an internal space surpassing external measures of the capsule in all directions defining a gap between the capsule and cabinet wherein the thus defined gap is filled out with a hardening silicone.

Abstract: A hearing aid includes a magnetostrictive electroactive (ME) sensor that generates an electrical signal in response to a magnetic field or a mechanical pressure. In various embodiments, the ME sensor is used for cordless charging of a rechargeable battery in the hearing aid by generating an electrical signal in response to a magnetic field generated for power transfer, magnetic sound signal reception, and/or detection of user commands by sensing a magnetic field or a pressure applied to the hearing aid.

Abstract: An electromagnetic speaker is disclosed and includes a frame having an elongated axis, a magnet magnetized along a radial direction and received in the frame, a voice coil fixed relatively to the frame and surrounding the magnet, a first elastic plate suspending the magnet in the frame, and a vibrating plate driven by the magnet to move along the elongated axis of the frame. By virtue of the configuration mentioned above, the electromagnetic speaker has a small form with a reduced height. Further, greater driving force is generated by the magnet driving the vibrating plate.

Abstract: Systems and methods for data communication using audio patterns are described. The methods include encoding a message into an audio pattern, mixing the audio pattern with an audio content to obtain a mixed audio content, wherein the audio pattern is inaudible in the mixed audio content, and transmitting the mixed audio content.

Abstract: A liquid-resistant acoustic assembly for an electronic device includes an acoustic device positioned in a housing, a gasket compressed between the acoustic device and the housing, and a liquid-resistant membrane. The liquid-resistant membrane is disposed such that it is isolated from a non-uniform compressive distribution resulting from compression of the gasket. The liquid-resistant membrane may be uncompressed by compression of the gasket or compressed by a different compressive force than the gasket. For example, the liquid-resistant membrane may not be positioned between the gasket and the acoustic device, may be separated from the gasket, may be mounted to a shelf of the gasket or within a gap defined by the gasket, mounted to a stiffener positioned within the gasket, and mounted using other similar configurations.

Abstract: Examples of retaining seal assemblies for acoustically sealing and retaining a canal hearing device or an earpiece within the ear canal are disclosed. The retaining seal assembly may include one or more flanges and a clip element. The flanges may include elongate trenches along an exterior surface of one or more of the flanges. The elongate trenches may allow the flange to conform to the shape of the ear canal and distribute concentric compressive forces when the seal assembly is inserted in the ear canal. The clip element may be formed of a relatively rigid material and may include one or more locking tabs. The conforming flanges may be concentrically positioned over the clip element. The seal assembly may include a debris barrier to provide protection for a sound outlet of the canal hearing device or the earpiece.

Abstract: A method of analyzing performance of frequency lowering hearing aids. The method includes generating a sequentially of noise signals and transmitting acoustical sounds from a sound output device in response to the sequence of noise signals. A sound input device records the acoustical sounds and saves as a first device data. The sound input device with a frequency lowering hearing aid records the acoustical sounds and save as a second device data. The second device data is compared to the first device data and, in response to the comparison, at least one function of the frequency lowering hearing aid is optionally adjusted.

Abstract: A hearing aid assembly comprising a receiver comprising a front chamber and a back chamber being acoustically coupled to respective front and back chamber openings, and acoustical guiding means for guiding air from at least one of the front and back chamber openings to an air mixing zone for mixing air from the front and back chamber openings. The mixing of air from the front and back chambers enhances the low-frequency response of the hearing aid assembly.

Abstract: A platform for audio and electronic music applications where the electronics are implemented as modules, and the modules mount in a cabinet with a common power supply and infrastructure. The platform addresses problems in electrical, mechanical, usability, and power distribution areas, and is suitable for guitar effects, synthesizers, studio equipment, and DJ gear.

Abstract: A method for detecting whistling in an audio system includes determining an average frequency of an input signal of the audio system, sampling the input signal in consecutive blocks of at least one sample, wherein the average frequency is determined blockwise, and determining whether feedback related whistling is present in the input signal of the audio system by evaluating a stability of the average frequency, wherein the evaluation of the stability of the average frequency comprises: determining a difference of two values of the determined average frequency for two blocks, and comparing the determined difference to a first threshold value.

Abstract: A capacitive microphone and method of fabricating the same are provided. One or more holes can be formed in a first printed circuit board (PCB). A diaphragm can be surface micromachined onto an interior surface of the first PCB at a region having the one or more holes. Interface electronics can also be interconnected to the interior surface of the PCB. One or more spacer PCBs can be attached to a second PCB to the first PCB, such that appropriate interconnections between interconnect vias are made. The second PCB and first PCB with spacers in between can be attached so as to create a cavity in which the diaphragm and interface electronics are located.