Abstract: Provided is a digital microphone having a power supply. In this case the power supply is configured so as to provide a P48 V phantom power.

Abstract: An acoustic exciter comprises a suspension made of an elastic material, which is coupled to the opening part of a frame, and a vibrator to which a voice coil disposed in the magnetic gap of a magnetic circuit connected to the suspension is coupled. An elastic body is so disposed between the frame and the vibrator as to be pressed against the frame and the vibrator. Thereby, the exciting efficiency of the vibrator can be increased, and the performance and tone quality of the acoustic exciter can be improved.

Abstract: An acoustic device (500), comprising an oscillatory membrane (501) which comprises a transducing element (503) and a frame (504) adapted for accommodating the membrane (501) in an accommodation plane, wherein the membrane (501) is accommodated in the frame (504) in such a manner that a translational motion of the membrane (501) in at least one direction of the accommodation plane is made possible.

Abstract: A circuit and method of switching an output of a single preamplifier to or from multiple amplifier output stages. The preamplifier output is switched between multiple audio amplifier output stages without degrading the performance of the output signal. A switching circuit selectively couples the preamplifier output to an amplifier output stage and also couples a feedback loop between the selected amplifier output stage and the preamplifier stage.

Abstract: A microphone in a miniaturized form is described herein. The microphone includes a flat carrier substrate having a first recess extending through the carrier substrate. The microphone includes a first electro-acoustic transducer on a first surface of the carrier substrate and at least partially overlapping the first recess. The microphone also includes a cap on a second surface opposite the first surface having a tight seal with the second surface and spanning the first recess. The cap includes at least one metallic layer for electromagnetic shielding.

Abstract: A device includes a substrate and a transducer attached to the substrate, wherein the substrate includes a surface to which the transducer is attached and at least one edge member extending along at least a portion of the outside edge of the surface. The surface can be a generally planar surface. The edge member is stiffer than the surface. In several embodiments, the transducer is adapted to vibrate. The transducer can, for example, be selected from the group consisting of a piezoelectric transducer, an electrostrictive transducer and a magnetostrictive transducer. Preferably, the transducer is attached to the surface of the substrate by a metallic bonding agent and, more particularly, by welding.

Abstract: A portable electronic device includes an earphone jack for receiving an earphone plug, a switch unit and a signal processing unit. The switch unit is connected to the earphone jack and is switchable between a first state and a second state. The signal processing unit is connected to the earphone jack and the switch unit. The signal processing unit is used to identify a type of the earphone plug received in the earphone plug and control the switch unit to switch to either the first state or the second state according to the type of the earphone plug.

Abstract: A transducer membrane enhances sound reproduction. Curved portions of the membrane periphery contribute to the enhanced sound reproduction. The transducer membrane may add or improve sound reproduction capability in cell phones, gaming systems, personal data assistants, or other devices.

Abstract: The present invention provides a sound outputting apparatus, including: a housing; an electro-acoustic conversion section provided in the housing and configured to acoustically reproduce and output a sound signal; an acousto-electric conversion section provided at a position of the housing at which sound acoustically reproduced by the electro-acoustic conversion section can be collected; a removing section configured to remove a component of the sound signal from an output signal to be outputted from the acousto-electric conversion section based on an acoustic transfer function between the electro-acoustic conversion section and the acousto-electric conversion section; a decision section configured to decide whether or not a predetermined operation is performed for the housing based on an output signal from the removing section; and a control section configured to control so that a predetermined process is performed based on a result of the decision by the decision section.

Abstract: A portable information processing terminal is provided which can display an application execution-enabled time period. A download section 122 stores, in an application storage section 103, an application obtained from an outside. An application management table 500 has registered therein a power consumption, per unit time, for the application stored in the application storage section 103. A power measurement section 110 measures the power consumption per unit time for the application which is being executed. An application status management section 100 manages the application management table 500, and calculates the execution-enabled time period for the application, based on the power consumption for the application per unit time, and a remaining battery power in a battery section 15. A display section 11 displays the execution-enabled time period for the application.

Abstract: Electroactive transducers as well as methods of producing a haptic effect in a user interface device simultaneously with a sound generated by a separately generated audio signal and electroactive polymer transducers for sensory feedback applications in user interface devices are disclosed.

Abstract: A speaker includes a base, a diaphragm, a separating module, a first electrode set and a second electrode set. The base and a porous structure are formed a cavity. The diaphragm is disposed in the cavity and includes a first part and a second part. The separating module is located in the cavity and contacts the diaphragm to separate the cavity into the first and the second chambers. The first electrode set disposed in the first chamber is connected to a first sound source signal, such that the first part of the diaphragm is vibrated and the first sound source signal is exported from the first chamber. The second electrode set disposed in the second chamber is connected to a second sound source signal, such that the second part of the diaphragm is vibrated and the second sound source signal is exported from the second chamber.

Abstract: A speaker system includes a circuit board and a speaker device disposed on the circuit board. The speaker device includes a speaker unit for generating an audio output, and an antenna directly mounted on the speaker unit for radiating and receiving radio waves.

Abstract: The present invention is to provide a speaker having desirable sound characteristics with a smaller size, and a speaker unit having the speaker. The speaker unit has the speaker and an attachment unit. The speaker has a case, a magnetic circuit, a diaphragm, and a passage. A first chamber is disposed between an inner surface of an outer case of the case and an outer surface of the magnetic circuit. A second chamber is disposed between the diaphragm and the magnetic circuit. The passage communicates with the first and second chambers and has a groove disposed on a bottom wall of the case.

Abstract: Systems, apparatus, devices, and methods for converting electrical signals into sound using an acoustic transducer. The inventive acoustic transducer utilizes the motion of an airfoil shaped element to generate a sound wave, with the airfoil element being driven in response to an electrical signal input to a suitable driving element. In some embodiments, the airfoil element or elements act to mechanically couple the motion of an armature attached to the driver to the surrounding air, producing sound waves in a more efficient manner than typical acoustic transducer devices. Embodiments of the invention may be used in the design of loudspeakers, earpieces, headphones, and other devices for which a high efficiency transducer is desired.

Abstract: The present invention concerns a waveguide unit, for use with a transducer unit, and in particular transducer of the dome type, where the wave guide unit is substantially circular, and suitable to be arranged around the transducer, where the wave guide unit has a front side on which front side means are provided for reflecting the sound waves from the transducer, and a substantially flat backside, and where substantially centrally in the unit an aperture is provided which aperture is suitable for accommodating a transducer unit, and the side of said aperture connects the front and back sides, where said waveguide comprises one or more diffraction edges arranged concentric with the circular shape of the unit on said front side of the unit, and where adjacent on both sides of said one or more diffraction edges, substantially flat conical surfaces are provided.

Abstract: A thermal management system improves thermal property of the speaker system by promoting air circulation to cool the speaker system. The thermal management system includes a speaker frame, an air guide formed on the speaker frame for guiding the air, a ventilation slit formed on the air guide which penetrates through the speaker frame for air communication, and a spider mounting ring for mounting a spider of the speaker system on the speaker frame. The spider mounting ring has a cut-out at its upper edge which positionally match the air guide. The cut-out is curved sharply at its upper surface while a lower edge of the spider mounting ring is gently curved, thereby creating an air passage of directional property.

Abstract: A sound-permeable film (11) includes: a porous membrane (13) that contains polytetrafluoroethylene as its main component, allows sound to pass therethrough, and prevents an foreign object such as a water drop from passing therethrough; and a heat-resistant double-sided adhesive sheet (15) that is disposed on a part of at least one of main surfaces of the porous membrane (13).

Abstract: A speaker device may include a substrate, a membrane above the substrate, and an electrode above the membrane, a plurality of first supporting members, and a plurality of second supporting members. The second chamber is enclosed between the membrane and the substrate, and the first chamber is enclosed between the electrode and the membrane. The first supporting members are provided in the first chamber space and may space the membrane apart from the electrode. The second supporting members are provided in the second chamber space and may space the membrane apart from the substrate.

Abstract: A speaker apparatus includes a speaker and a sound box. The sound box is shaped like a wine barrel and includes arced side boards and parallel top and bottom boards coupled to upper and lower ends of the side boards, respectively. The sound box is divided by at least an isolating board into air chambers interconnected with one another via at least an air aperture formed in the isolating board, and at least an air venting hole is formed through at least one of the side boards so as to communicate the air chambers with the outside. The speaker is installed on the top board via an installation hole formed therein. The interconnected air chambers and side boards produce air cushions corresponding to resonant frequency sections of the speaker, thereby enabling the speaker to reproduce original audio sounds without interfering with a successively formed air cushion.

Abstract: A loudspeaker system for an aircraft cabin for passengers has a support structure, which includes multiple flexible flat elements, forming the internal walls of the cabin, and fastening devices for fastening flat elements to the support structure, so that the flat elements may oscillate. At least one acoustic driver is connected to one or more flat elements, to induce a bending movement in the one or more flat elements. The particular flat element may oscillate as an acoustic diaphragm. The acoustic driver has a film-shaped piezoelectric exciter, which is bonded flatly to the flat element. The flat element bonded to an exciter has a first cover layer, a second cover layer, and a core layer between them. The core layer is subdivided in a plane parallel to the first and second cover layers by a horizontal incision in at least one predefined area.

Abstract: A speaker has an acoustic diaphragm, and an actuator that is driven based on a first acoustic signal. The actuator has a transmission portion that is directly or indirectly attached to the acoustic diaphragm and transmits a displacement output of the actuator to the acoustic diaphragm. The speaker also has a sounding body that is driven based on a second acoustic signal that is identical to or different from the first acoustic signal.

Abstract: A wireless communication device includes a speaker grille, a built-in speaker provided behind the speaker grille, and an output amplifier connected to the built-in speaker. A voltage applied to the output amplifier is increased to a level higher than the level of voltage applied to the output amplifier while audio signals are being produced, and instead of the audio signals, low-frequency continuous signals are applied to the output amplifier. By increasing the voltage applied to the output amplifier to a level higher than the level of voltage applied to the output amplifier while audio signals are being produced, the amplitude of the voltage applied to the speaker is increased. Also, instead of the audio signals, low-frequency continuous signals are applied to the output amplifier so that the speaker produces a higher sound pressure than while audio signals are being produced to discharge water in the speaker grille under the sound pressure.

Abstract: A superdirectional acoustic system for reproducing a sound signal supplied from a real sound source by using a superdirectional speaker and producing a virtual sound source in a vicinity of a sound wave reflection surface. The system includes an ultrasonic speaker, which includes an ultrasonic transducer for oscillating a sound wave in an ultrasonic frequency band, for reproducing an audio signal in a relatively medium to high frequency sound range, which is included in the sound signal supplied from the real sound source; and a low frequency sound reproducing speaker for reproducing an audio signal in a relatively low frequency sound range, which is included in the sound signal supplied from the real sound source. Sound in the medium-high frequency range is reproduced in a manner such that the sound is produced from a virtual sound source which is formed in the vicinity of the sound signal reflection surface such as a screen.

Abstract: A sound system which has, for example, a radio, a cassette and a CD player is usually already installed in cars as standard or as an option. In addition, a better sound system includes a box system which has a tweeter and a woofer. In order to provide a speaker box which is suitable particularly for dispensing frequencies below 150 Hz and at the same time has neat pulses accompanied at the same time by little distortion, pulse dynamics and is highly effective, a sound transducer (10) is introduced into the supporting structure of the vehicle. This takes place in such a manner that subcompartments which are separated from each other adjoin each of its two membrane sides. In this case, the two subcompartments of the speaker box are formed by at least two elements (2, 3, 4) of the supporting structure of the vehicle (1).

Abstract: A backup alarm for producing an audible warning signal which warbles or beeps, at selected audible output power (Db) levels includes a computer which drives a speaker by switching drive voltage to the speaker with above audible, high frequency pulses in packets repetitive at audible frequency. The high frequency pulses are pulse width modulated at different ratios selected from tables in memory of the computer in accordance with the voltage from a battery power source which provides the drive voltage so that the audible output power remains constant at the selected level over a wide range of power source voltage. By providing for warning/alarm signal generation by means of an operating system which provides both high, above audible frequency and audible frequency switching, power conservation and warning signal output power control are accomplished without interference.

Abstract: The present invention is drawn to inertial type transducers and a system for reducing the complexity and difficulty of installing the transducers internal to a structure. The transducer is equipped with a wireless receiver for receiving both sound content signals and control signals, and an amplifier, along with a power supply. Because the amplifier is activated by the wireless receiver, there are no wires necessary to connect the transducer to the source of the sound content or control signals thereby vastly simplifying installation. Heat dissipation and height minimization are also addressed.

Abstract: An apparatus uses a transducer to produce vibration in the ultrasonic frequency range and in the audible frequency range. A membrane or cantilever structure is coupled to the transducer to produce acoustic waves. When the vibration is in the audible frequency range, the membrane structure works like a conventional loudspeaker. When the vibration is in the ultrasonic frequency range, the ultrasonic signal is modulated by audio signal for creating better directivity. The acoustic waves in the ultrasonic frequency range can reproduce directional audible sound due to the nonlinear interaction of ultrasonic waves in air.

Abstract: In various embodiments, a speakerphone may comprise multiple (e.g., 16) microphones placed in a circular array around a central speaker. The microphones may be mounted vertically in the speakerphone with their respective diaphragms substantially parallel to the top surface of the speakerphone. The centrally mounted speaker may be coupled to a stiff internal speaker enclosure. The speaker enclosure may be made of a stiff, heavy material (e.g., a dense plastic) to prevent the speaker vibrations from excessively vibrating the speakerphone enclosure (which may affect the microphones). The speaker enclosure may also include a raised rim and ridges to increase its stiffness.

Abstract: There is provided a method and apparatus for modifying an audio signal. An exemplary method comprises providing an audio signal and analyzing the characteristics of the provided audio signal relative to one or more predetermined desired audio characteristics. The exemplary method also comprises applying to the provided audio signal a transfer function to thereby create a processed audio signal possessing one or more of the predetermined desired audio characteristics. The exemplary method additionally comprises issuing the processed audio signal.

Abstract: Electrical signals corresponding to sound are received at a wire, and sound is generated at a speaker connected to the wire. The sound is resonated in a cavity of a shell housing the speaker, and then passed along a transmission tube toward a pinna of a user's ear without directing the sound directly toward the user's ear canal.

Abstract: An ear-hanging microphone comprising; a c-shaped hanger; a cable pole, whose first end connecting said hanger at a first end thereof; a flexible strap, whose two ends being twisted on said hanger, and the length of said flexible strap being shorter than the longest one of the diameters of said hanger; a microphone, which connecting said cable pole at a second end thereof; a stop block, which connecting said hanger at a second end thereof; a socket, which being embedded in said stop block, and said socket and said microphone being linked electrically; a pin, which being correspondingly inserted into said socket to realize electrical link; and an electrical cable, which being linked electrically with said pin. Because of the usage of the flexible strap, the usage period of the ear-hanging microphone is prolonged and the user feels more comfortable and convenienter.

Abstract: A microphone system has a chip system coupled to a base. Among other things, the chip system includes a microphone chip and a circuit chip, in a stacked relationship, configured to electrically communicate. The microphone chip has a diaphragm configured to move upon receipt of an incident audio signal, while the circuit chip has at least one through hole audibly coupled with the diaphragm of the microphone chip.

Abstract: A speaker structure including a single electret vibrating film structure, a single metal electrode with a plurality of holes and a frame supporting member is provided. In an example, the electret vibrating film structure is formed by an electret film layer, an ultra-thin metal thin film electrode and an isolation layer stacked together, in which the ultra-thin metal thin film electrode is located between the electret film layer and the isolation layer. In another example, the electret vibrating film structure is formed by the electret film layer and a conductive electrode layer having oxide conductive materials. The frame supporting member is located between the electret vibrating film structure and the metal electrode for forming a space for the vibration of the electret vibrating film structure, so as to generate sounds.

Abstract: A printed circuit board includes a first signal layer, a first ground layer, a second signal layer, a power layer, a second ground layer, and a third signal layer. The first signal layer includes an analog audio input/output (I/O) port and an audio chip. The audio chip includes a main body, a first group of signal pins connected to the analog audio I/O port, and a second group of signal pins connected to a control chip. The first ground layer, the power layer, and the second ground layer are each divided into an audio part and a digital part. The three audio parts act as a reference plane for traces between the analog audio I/O port and the audio chip, the three digital parts act as reference planes for traces between the control chip and the audio chip.

Abstract: An apparatus for acoustic beamforming comprises a beamform processor (105) for generating a beamformed signal from two audio inputs. An update processor (107) updates the beamforming filter of the beamform processor (105) if an update criterion is met. An adaptive filter (111) filters the signal from one of the signals and the difference signal between the filtered signal and the signal from the other audio input (101) is generated. An adaptation processor (115) adapts the adaptive filter (111) to minimize the difference signal. A criterion processor (109) modifies the update criterion in response to the (possibly normalized) difference signal. Specifically, the update criterion may be relaxed to improve acquisition performance if the difference signal is indicative of a strong signal outside the beam of the beamform processor (105).

Abstract: A device into which an electro-acoustic transducer is incorporated has at least two audio signal conductors through which the device may be coupled to another device to convey analog audio signals representing sounds at a time when the other device places a relatively low DC bias voltage across the at least two audio signal conductors, and to be operated as either a digital serial bus to exchange pieces of digitally-encoded data concerning the electro-acoustic transducer or as a trigger to cause the electro-acoustic transducer to be bypassed to enable another electro-acoustic transducer to be tested at a time when the other device places a relatively high DC bias voltage across the at least two audio signal conductors.

Abstract: An electro-acoustic transducer or a device into which an electro-acoustic transducer is incorporated has at least two audio signal conductors through which the electro-acoustic transducer or device may be coupled to another device to convey analog audio signals representing sounds at a time when the other device places a relatively low DC bias voltage across the at least two audio signal conductors, and to be operated as a digital serial bus to exchange pieces of digitally-encoded data concerning the electro-acoustic transducer at a time when the other device places a relatively high DC bias voltage across the at least two audio signal conductors.

Abstract: A transducer and method of forming a transducer is disclosed. The method comprises locating a feed wire for forming a drive pin on a reed surface, welding a first end of the feed wire to the reed, cutting the feed wire to form a drive pin, and securing the drive pin to a paddle. The first end of the feed wire can be welded to the reed by a laser welding operation. The laser melts the reed to form a molten reed material, and the feed wire is pushed through the molten reed material to form a weld between the feed wire and the reed, once the molten reed material solidifies. The wire coil is then cut with a second laser to form the drive pin. The drive pin is then adhered to a paddle with an adhesive.

Abstract: An apparatus and method for creating a MEMS directional sensor system capable of determining direction from at least two microphones to a sound source over a wide range of frequencies is disclosed. By utilizing a stiff beam stand-off architecture that relies on a unique manufacturing technique in a MEMS device, such as described herein, a very small set of microphones, on the order of a few micrometers, can be designed with unsurpassed ability to detect a sound source location.

Abstract: This device enables the user to personalize the sound that comes out of his/her siren, since this invention is an improvement over conventional sirens in that it has a 3.5 mm female jack for an audio input, a male connector for a pushbutton, a female connector joined to the pushbutton and said pushbutton, in addition to a recording/playback unit, a repetition control unit and an amplification unit incorporated with which the user can record an unlimited number of 30-second audios, whether from a microphone or a PC, and can play them back repeatedly to serve as an alarm.

Abstract: An audio amplifier system having improved power efficiency by wasting less power in its bias voltage circuit. An amplifier provides a voice signal to a first (+) input of a loudspeaker and a high efficiency converter provides a bias voltage to a second (?) input of the loudspeaker. In multi-loudspeaker systems, a single high efficiency converter can bias all the loudspeakers at a common node. The high efficiency converter can be a charge pump or a buck converter or the like, and has greater than 90% efficiency.

Abstract: A speaker having a voice coil is disclosed. The voice coil includes two parallel main members and two linking members connecting the two main members for forming a closed loop, one of the linking member having at least a first part from a first circle having a first diameter, and at least a second part from a second circle having a second diameter greater than the first diameter.

Abstract: A switching operation is performed in response to an externally applied DC control signal from an external load. An input connector receives an input audio signal from an external audio source, and an output connector that provides an audio output signal. A DC isolator couples the input audio signal from the input connector as the audio output signal on the output connector while isolating the externally applied DC control signal from the input connector. A switch is responsive to the externally applied DC control signal applied to the output connector so as to perform the switch operation.

Abstract: The invention concerns a method and device for actively correcting acoustic properties of a listening zone (27) of an acoustic space (1), comprising means for converting a signal to be reproduced (2, 4) in an acoustic space (1), means for attenuating resonance including at least means for measuring the perturbed sound signal (15), means for processing an electric signal (6) and at least one secondary sound reproduction source (8).

Abstract: A Bluetooth earphone and a lanyard structure thereof are provided. The Bluetooth earphone includes an earphone body and a lanyard structure. The lanyard structure includes a lanyard and a clip element. The lanyard is disposed on the clip element. The clip element includes two hooks gripping the earphone body for combining the lanyard structure with the earphone body.

Abstract: An ultrasonic transducer includes: a pair of fixed electrodes including a conductive member; a vibrating film having a conductive layer; and a member which holds the pair of fixed electrodes and the vibrating film. The vibrating film is formed of nonconductive bodies and has an electrode layer formed of a conductive material. The electrode layer is applied with a DC bias voltage of a single polarity by a DC bias supply, and is also applied with an AC signal output from a signal source superimposed on the DC bias voltage. The pair of fixed electrodes have a plurality of holes of the same number at positions facing each other via the vibrating film, and an AC signal is applied between the conductive members of the pair of fixed electrodes by the signal source.

Abstract: A loudspeaker system for the optimization of sound production so as to achieve limbic and cortical arousal, comprising a resistance-controlled (or partially mass-controlled) woofer system, a mass-controlled (or partially resistance-controlled) midrange system, and a resistance-controlled tweeter system. This system may further comprise crossover networks of a particular configuration. By use of unsymmetrical networks of low order, it is possible to obtain a complete system which exhibits flat delay response.

Abstract: A door control apparatus and methods for controlling a door motion device for a hinged door and, optionally, illuminating a designated area on the floor. During the time the designated area is illuminated, a person can expect that the door will not close. The door control apparatus may include control circuitry, and a sensor, and optionally a light emitter and/or a sound emitter. The sensor detects a person proximate to the door and signals the control circuitry upon a detection event. The light emitter is also connected to the control circuitry. Upon a detection event, the control circuitry signals the light emitter to produce light and signals the door motion device to hold the door open. The light emitter directs light to form an image on the floor in the designated area. The light emitter may be, for example, a laser generator or a light emitting diode lamp.

Abstract: An acoustic adaptive noise generating device in the form of a flat panel loudspeaker is suitable for increasing people's powers of concentration in acoustically difficult surroundings. The adaptive noise generating device includes a carrier panel, an actuator arranged on the carrier panel. A control device is connected to the actuator and permits adjustment of noise signals emitted by the actuator.