Electrical audio signal processing systems and devices inventions 05/06

20060109986 - Apparatus and method to generate virtual 3d sound using asymmetry and recording medium storing program to perform the method: A virtual 3D sound generating apparatus and method, which can be easily applied to portable devices such as headphones and earphones. The method includes delaying a first input signal for a first time corresponding to a distance between a first virtual sound source and the left ear of a virtual...

20060109987 - Burglar proof car audio system capable of attaching and detaching portable mp3 player and control method thereof: The preset invention discloses a burglar proof car audio system which can protect the car audio system against theft because a portable MP3 player is attachable and detachable thereto and the car audio system is operated only when the portable MP3 player is mounted thereto, and a control method thereof....

20060109988 - System and method for generating sound events: A system and method for recording and reproducing three-dimensional sound events using a discretized, integrated macro-micro sound volume for reproducing a 3D acoustical matrix that reproduces sound including natural propagation and reverberation. The system and method may include sound modeling and synthesis that may enable sound to be reproduced as...

20060109989 - Sound projector: Parametric loudspeakers that are based on a modulated ultrasound carrier signal produce strong directional patterns. This strong directional patterns require a direct transmission path from the loudspeaker to the audience. Obstacles in this path have a reflecting or absorbing effect. The invention describes a mechanical arrangement of a parametric loudspeaker...

20060109990 - Capacitor microphone: A capacitor microphone includes a microphone unit having one acoustic terminal or more than one acoustic terminals at one end or opposite ends thereof; an acoustic resistor provided near the acoustic terminal or near one of the acoustic terminals; and a case housing the microphone unit. The acoustic resistor is...

20060109991 - Audio/video playback system: An AV playback system of the present invention is configured by connecting an AV playback output device and a speaker driving device to each other by a cable. The AV playback output device includes a playback device and a cable connector. The connector includes a video output terminal, an audio...

20060109992 - Device for level correction in a wave field synthesis system: For a level correction in a wave field synthesis system having a wave field synthesis module and an array of loudspeakers for providing sound to a presentation region, a correction value which is based on a set amplitude state in a presentation region is determined, the set amplitude state depending...

20060109994 - Acoustic system with automatic switchover: The automatic switching of acoustic systems and especially of hearing aids into different processing programs is to be improved. To this end there is provision for the signal processing device of the acoustic system to feature a high-frequency detector for analysis of an input signal, with the output signal of...

20060109993 - Volume control in a hearing aid and hearing aid with volume control: The invention concerns a volume control in a hearing aid, which has a signal path from a microphone to a receiver, and where the signal path is adapted to provide an amplification of the signal delivered to the receiver, where a first and a second user input means is provided...

20060109995 - Hearing device and corresponding method for inserting the hearing device: Hearing devices with a first behind-the-ear part and a second in-the-ear part should be easy to insert. For this purpose a rigid linking element is proposed, which connects the first and second parts. Alternatively, the linking element can be made of a memory material or have a spring component, so...

20060109997 - Electronic apparatus: Disclosed is an electronic apparatus including: an enclosure constituting an outer case of the apparatus; a receiving recess, formed of a bottom wall and a side wall uprising from a circumference of the bottom wall, disposed on the enclosure as opened outward; a holding member, formed of a vibration relaxing...

20060109996 - Microphone system for vehicle: A vehicle interior rearview mirror assembly (10) comprises an accessory (24), a reflective element (18) and a bezel (20). The mirror assembly may define portions of a pocket (23) that at least partially receives and secures the accessory therebetween when the reflective element is at least partially received in the...

20060110000 - Condenser microphone: It provides a condenser microphone such as a tiepin type including a small microphone unit, which is capable of effectively suppressing noise generation due to an electromagnetic wave. It covers the entirety from a microphone unit 12 to a connecting cable 22 with an integrally formed cover member 32 and...

20060109999 - Electro-acoustical transducer and a transducer assembly: An electro-acoustical transducer comprising DC atmospheric pressure equalization vents for equalizing pressure in both chambers therein. The sound port of the transducer may be sealed by a sound conducting member preventing gas flow there through. The transducer may have a single vent extending in a plane of a side portion,...

20060109998 - System and method for rf immunity of electret condenser microphone: A system and method for RF immunity of an electret condenser microphone. In one embodiment, the microphone comprises a printed wire board, an amplifier, a capacitor. The amplifier and the capacitor are mounted on the printed wire board such that longitudinal axis, i.e., the axis defined by the line between...

20060110001 - Inertial voice type coil actuator systems: The present invention includes a variety of magnetic circuit arrangements functioning as acoustic drivers. The circuits include a coil former around which is wrapped a conductive coil and a magnetic gap in which the former is at least partially positioned. Further, an output disk is associated with the former to...

20060110002 - Loudspeaker suspension: A loudspeaker suspension structure has an inner circumferential border, and an outer circumferential border, and grooves each extending from the inner circumferential border to the outer circumferential border at an angle with respect to a normal to the inner circumferential border, a profile of a circumferential section of the suspension...

20060110003 - Voice coil mounting structure: Disclosed is a voice coil mounting structure, which includes a reel, which has a first end mounted with a coil and a second end provided with equiangularly spaced female retaining portions, and a reel holder, which defines an annular space for accommodating the second end of the reel and has...

20060104451 - Audio reproduction system: Control system for devices such as an audio reproduction system, an actuator device, an electromechanical device and a telephony device. The system includes control circuitry that receives an input signal and a signal indicative of a position of a portion of the controlled apparatus. The control circuit provides an output...

20060104453 - Method and apparatus for automatically setting speaker mode in audio/video system: A method and apparatus for automatically determining a characteristic of a speaker and automatically setting a speaker mode in an audio/video system. The method includes: detecting a current for operating the speaker by inputting a predetermined signal; measuring an impedance characteristic of the speaker in accordance with a frequency change...

20060104452 - Method and apparatus to automatically set speaker modes in a multi-channel speaker system: A method and apparatus to automatically set a speaker mode based on characteristics of a speaker installed in an audio/video system. The method includes generating a predetermined broadband signal and reproducing the predetermined broadband signal through a speaker, determining a reproducing ability of the speaker for each frequency band by...

20060104455 - Microphone array signal enhancement: A system and method facilitating signal enhancement utilizing an adaptive filter is provided. The invention includes an adaptive filter that filters an input based upon a plurality of adaptive coefficients, the adaptive filter modifying at least one of the adaptive coefficients based on a feedback output. The invention further includes...

20060104454 - Method for selectively picking up a sound signal: A system for selectively picking up a speech signal focuses on a speaker within a group of speakers who wishes to communicate something to the system using an image analysis algorithm to identify, based on a recognition feature, a position of at least one person who wishes to give the...

20060104456 - Apparatus and method for boosting sound in a denta-mandibular sound-transmitting entertainment toothbrush: A device and method for transmitting sound waves between a signal source and a user's ears, wherein the sound waves bypass the air. The sound waves are conducted by the user's teeth and bones to the user's ears, where they are perceived as sound. Sound-transmitting toothbrushes and the like are...

20060104457 - Microphone system and microphone apparatus: A microphone system including a main unit for controlling the entire system and microphones having cascade connections from the main unit assuming the main-unit side upstream and the opposite side downstream. The microphone includes communication control means for controlling data transmitted between the main unit and microphones, sound input means...

20060104459 - Method for reducing interferences of a directional microphone: The interference powers with directional microphones are to be suppressed as far as possible. To this end, provision is made to adaptively filter the microphone of a number of microphones as a function of at least one parameter. The directional effect of the directional microphone achieved in this way is...

20060104458 - Video and audio conferencing system with spatial audio: In some embodiments, spatially realistic audio may be provided for a conference call. Voices from participants on the left side of a display, in a conference call, may be directed through audio on the left side of the display at the other conferencing system in the conference call (similarly for...

20060104460 - Adaptive time-based noise suppression: Systems, an apparatus, and methods are provided for mitigating noise associated with an audio signal. A system (100) for mitigating noise associated with an audio signal includes an estimator module (108). The estimator module determines an estimated level of noise associated with the audio signal. The system also includes an...

20060104461 - Apparatus and method for decreasing the blocking capacitor in an audio system: In an audio unit in which the audio signals are processed by processing unit and applied to an audio output unit through a blocking capacitor, the value of the blocking capacitor can reduced and the frequency response maintained by providing low frequency compensation. The low frequency compensation is provided by...

20060104462 - Crossover circuit for reducing impedance response variance of a speaker: Embodiments of the present invention are directed to crossover circuits for reducing impedance response variance of a speaker. A speaker includes at least one driver and one or more electrical components. The speaker has a baseline frequency and impedance response when no associated series resistance or impedance is connected to...

20060104464 - Hearing aid with a volume wheel: A hearing aid (1), fitted with an aperture (4) in a wall of a case (2, 3) receiving an adjustment wheel (5) which can be rotated from the outside by finger action around an axis of rotation (6) configured parallel to the wall (2), the adjustment wheel (5) driving a...

20060104463 - Storsignalfilter in horgeraten: In a process for filtering interfering signals, occurring with largely known constant repetition frequency at the use of hearing devices in or at the hearing device the repetition frequency of the interference signal shall be detected and at recognition of the known constant frequency the signal shall be suppressed or...

20060104465 - Method for detection of ultrasound in a listening device with two or more microphones, and listening device with two or more microphones: The invention concerns a method for detecting and minimizing the harmful influence of ultra sound in a listening device having two or more microphones. The energy contents in the microphone signals is determined, and time related changes in energy contents of the microphone signals is analysed to determine whether any...

20060104466 - A compact modular in-the-ear hearing aid: A hearing aid faceplate has a recess for holding a socket part, the faceplate having an engagement structure at an edge of the recess, and the socket part including: a projection structure for engaging the faceplate engagement structure, protruding resilient lugs for engaging the faceplate engagement structure, and battery terminals...

20060104467 - Set and method for producing a hearing aid and hearing aid produced according to this method: The invention relates to the production of a hearing aid comprising a shaped body that is adapted to an individual auditory canal. To this end, a casting cavity is created from a number of elements and this casting cavity is filled while inside the auditory canal. After the casting compound...

20060104468 - Condenser microphone and method of manufacturing substrate therefor: A substrate having a metal capsule which has an open end caulked to a planar periphery portion and in which an electric apparatus is accommodated includes a substrate main body having a planar central projecting portion consisting of a resin material and a step provided on a side of the...

20060104469 - Microphone coupler for a communication device: The invention provides a microphone coupler for a microphone located within a housing of a portable communication device and a device incorporating the coupler. The coupler comprises a body section and a conduit or just a conduit. The body section is shaped to fit around the microphone and is defined...

20060104470 - Low profile microphone: A low profile microphone includes a bottom plate adapted to be placed on a flat surface, a cover having holes through which sound waves are introduced and extending over the bottom plate, a microphone unit housed in a space defined by the bottom plate and the cover, and converting sound...

20060104471 - Headphone apparatus: A headphone apparatus the acoustic characteristics of which can be easily changed in accordance with the type of content the user wants to listen to. An adjusting knob provided on the housing of the headphone apparatus is moved, closing an opening made in a baffle. As a result, an acoustic...

20060104472 - Voice coil device and speaker device using the voice coil device: A speaker device includes a vibration system having a frame, first and second voice coils, a voice coil bobbin, a diaphragm and a magnetic circuit holder, and a magnetic circuit system having a yoke, a magnet and first and second plates. The first and second voice coils are wound around...

20060104473 - Loudspeaker diaphragm systems: A loudspeaker diaphragm includes a continuous coating on at least one surface of the diaphragm. The continuous coating may be non-uniform and may taper from a maximum in value in one region of the diaphragm to a minimum value in another region of the diaphragm. The coating is formed in...

20060098825 - Electronic adaption of acoustical stethoscope: A stethoscope adapter receives and converts a stethoscope transducer signal using a predetermined inverse function. The adapter then transmits the converted signal as an acoustical signal through a tube connector. With this arrangement, the adapter converts the signal to compensate for undesirable non linear transmission effects through known stethoscopes. The...

20060098826 - Method and system for amplifying auditory sounds: This invention relates to a system for amplifying a sound in an auditory environment. The system comprises a microphone for transforming said sound to an electric sound signal; a band-pass filtering means connecting to said microphone and outputting a filtered sound signal; and an amplifier amplifying said filtered sound signal...

20060098827 - Acoustical virtual reality engine and advanced techniques for enhancing delivered sound: Techniques and systems for enhancing delivered audio signals are disclosed which may be employed in a delivery system at a server side, a client side, or both. The techniques include forming a processed audio signal by processing audio signals through multiple pathways which operate on different frequency bands using dynamic...

20060098828 - Network phone adapter capable of utilizing a normal phone to serve as a microphone and a speaker: A phone adaptor capable of utilizing a normal phone to serve as a speaker and a microphone of an electronic device. The phone adaptor includes a speaker driving circuit electrically connected to the electronic device for processing a first audio signal outputted from the electronic device, a microphone driving circuit...

20060098829 - Bone conduction device: A bone conduction device which, when particularly employed in the receiver of a bone conduction telephone, is capable of obtaining a sufficient amount of sound as to not only a bone conduction sound but also an aerial vibration sound to ensure clear reception of the sound. The bone conduction device...

20060098830 - Wave field synthesis apparatus and method of driving an array of loudspeakers: In a wave field synthesis apparatus for driving an array of loudspeakers with drive signals, the loudspeakers being arranged at different defined positions, a drive signal for a loudspeaker being based on an audio signal associated with a virtual source having a virtual position with reference to the loudspeaker array...

20060098831 - Method for adjusting the transmission characteristic of a hearing aid: In a method for adjusting the transmission characteristic of a hearing aid, the characteristic being defined by hearing aid-specific parameters, a data processing device is used that has a screen and a pointer device. On a graphics user interface of the data processing device, an object displayed in a first...

20060098832 - Method for amplifying an acoustic signal and corresponding acoustic system: Method for amplifying an acoustic signal and corresponding acoustic system In acoustic systems, especially with hearing aids, feedback whistling keeps occurring. To avoid this, a limit gain frequency response of the amplification device, which represents the limits of feedback whistling, is thus recorded. On the basis of the curve recorded...

20060098833 - Self forming in-the-ear hearing aid: A soft-solid ear piece is formed to fit the typical human ear canal and will self form to fill the ear cavity by having an internal structure, endoskeleton, or bladder to expand to precisely fit the ear piece securely and comfortably in the ear canal. This self forming ear piece...

20060098835 - Condenser microphone: The present invention prevents noise attributed to an electromagnetic wave by reducing a high-frequency impedance at the connection between a microphone case and a connection plug of an output cable. The present invention provides a condenser microphone including a microphone case 10 having a connector housing section 13 for an...

20060098834 - Microphone pick-up device: A microphone pick-up device includes an air chamber unit disposed posteriorly of an annular cap body. A pick-up unit generates an acoustic signal in response to detected sound, and includes a yoke mounted in a front portion of the cap body, a voice coil disposed around a washer and a...

20060098836 - Earphone for sound reproduction: In an aspect of the invention, a sealed earphone is provided with a nozzle, the earphone configured to be positioned in a user's ear so that the nozzle extends toward the ear canal of the user. The earphone includes a driver mounted within a housing of the earphone, the driver...

20060098837 - Loudspeaker: The invention relates to a loudspeaker, particularly intended for use in a motor vehicle. The loudspeaker includes a housing (2) with a front side (2a) and a rear side (2b), a diagram (8) flexibly connected to the housing and an actuator (6) for displacing the diaphragm with respect to the...

20060098838 - Dynamic micro speaker with dual suspension: The invention relates to a micro-speaker with a second suspension made of highly resilient material installed inside of the speaker. The speaker is able to provide high level acoustic output with low distortion rate in a wide frequency range with a very small and slim structure and it may prevent...

20060098839 - Voice coil device and manufacturing method thereof: A voice coil device is provided, which includes a bobbin made by rounding a thin plate of a high-strength metal material into a tubular shape, a heat-resistant fiber/resin composite film attached to a surface of the bobbin such as to cover at least abutting ends of the thin plate, and...

20060093151 - Battery operated speakerphone: In various embodiments, to avoid having to plug in the speakerphone, the speakerphone may be powered with a battery. In some embodiments, the speakerphone may exchange a discharged battery with a charged battery on a charging stand. In some embodiments, a charging stand, with a battery releasably coupled to the...

20060093152 - Audio spatial environment up-mixer: An audio spatial environment engine for flexible and scalable up-mixing from an M channel audio system to an N channel audio system, where M and N are integers and N is greater than M, is provided. The input M channel audio is provided to an analysis filter bank which converts...

20060093153 - Speaker driving device and audio output system: The present invention detects whether the supply voltage applied to the power supply terminal (3) is used for the dynamic speaker or for the piezoelectric speaker by the power supply voltage detection circuit (10), switches the gain of the amplifier circuit (8) in accordance with the detection result by the...

20060093154 - Ultrasonic based parametric multivalve loudspeaker system: An arrangement of parametric loudspeakers is described, in which the totality of the transducers is subdivided into groups, wherein each group is controlled by at least one modulator associated therewith, so that a parametric multi-path loudspeaker system results. Thereby it is made possible, that for each of the paths the...

20060093155 - Interface enhancement apparatus: An interface enhancement apparatus that increases the utility of devices that translate digital commands intended for a device with certain limitations in terms of the user specification of at least one control parameter to expand the ability of a user to specify the control parameter from a larger range of...

20060093156 - Sound diffuser, in particular for high fidelity sound reproduction systems: There is described a sound diffuser, in particular for high fidelity sound reproduction systems, which comprises two speakers (1, 2) having diffusing cones (3) oriented in the same direction. The two speakers (1, 2) are electrically connected with each other either in antiparallel or in antiseries. Each speaker (1, 2)...

20060093157 - Audio high-speed reproducing device and audio high-speed reproducing method: An audio high-speed reproducing device which can reproduce audio data at high speed comprises: setting means for dividing each frame which constitutes the audio data and setting an object portion to be processed for each of a divided first-half block and a second-half block according to a reproduction speed of...

20060093158 - Speaker system, audio amplifier and audio system: Speaker system is constructed of a plurality of speakers each including a bass-reflex type cabinet. The speaker system is designed to differentiate a low-band resonance frequency between the speakers by differentiating inner cubic capacities of the speaker cabinets from each other. Audio signal of a different channel is input to...

20060093159 - Method and apparatus to compensate for frequency characteristic of earphones: An earphone frequency characteristic compensating method and apparatus to compensate for a frequency response characteristic of earphones by selecting a target curve. The method includes measuring the frequency response characteristic of the earphones considering a frequency characteristic of an ear canal, extracting a filter coefficient by comparing the measured frequency...

20060093160 - Speaker with frequency directed dual drivers: A speaker that includes a pair of spaced-apart, in-plane mounted drivers connected in series to a network for applying the appropriate frequency component of the electrical input drive signal to each of the drivers is disclosed. A frequency dependent shunting network, such as a low pass filter, is applied to...

20060093161 - Method and apparatus for proximity sensing in a portable electronic device: A portable electronic device that automatically detects its mode of use and alters a characteristic of its user interface to match the mode of use. A mobile telephone is described as an example of a portable electronic device. The telephone is equipped with a proximity sensor that may indicate whether...

20060093162 - Voltage biased capacitor circuit for a loudspeaker: A voltage biased capacitor circuit (10) for a loudspeaker (14′) includes at least two audio circuit capacitors (32A, 32B) wired in series either on one of an audio connector or between audio connectors (16A′, 16B′). A direct current voltage source (34) is wired in electrical communication with the audio circuit...

20060093163 - Audio signal manipulator system: An audio signal manipulator system for manually manipulating digital audio signals to simulate the audio sounds emitted when a user mixes vinyl records. The audio signal manipulator system includes a console for storing and manipulating a digital signal input. A multimedia input apparatus for receiving a plurality of digital signal...

20060093164 - Audio spatial environment engine: An audio spatial environment engine is provided for converting between different formats of audio data. The audio spatial environment engine allows for flexible conversion between N-channel data and M-channel data and conversion from M-channel data back to N′-channel data, where N, M, and N′ are integers and where N is...

20060093165 - Flat panel speaker: A flat panel speaker has a construction in which an actuator 10 vibrates a panel to radiate sound, the panel being held at a peripheral portion thereof on a frame by gaskets, wherein the gasket provided at a position opposite from a position at which the actuator is placed has...

20060093166 - Condenser microphone: In a condenser microphone having a microphone case formed by a casting, the resistivity of the surface of the microphone case is decreased surely, and the shielding function of the microphone case is made stable. In a condenser microphone in which a substrate including an audio output circuit connected to...

20060093168 - Condenser microphone and method for manufacturing substrate for the same: A substrate is obtained as follows. A structure is formed using a metal plate for a lead frame on which terminals and connection portions are formed; the terminals are exposed from either a front or back surface and the connection portions connect the terminals together. A resin is then used...

20060093167 - Microphone with internal damping: Method and apparatus are disclosed for damping the resonance frequency in a microphone. The method and apparatus of the invention involve providing an elastomeric frame to support the backplate. The elastomeric frame forms a substantially air tight seal around the backplate. A hole is formed in the backplate and a...

20060093169 - Range detector for vehicular automatic transmission: A slider of a moving portion slides on a sliding surface of a guide portion according to selected range of an automatic transmission. A plurality of through holes is provided on the sliding surface. A detecting portion detects the range of the transmission based on the position of the moving...

20060093170 - Backplateless silicon microphone: A silicon based microphone sensing element and a method for making the same are disclosed. The microphone sensing element has a diaphragm with a perforated plate adjoining each side or corner. The diaphragm is aligned above one or more back holes created in a conductive substrate wherein the back hole...

20060093171 - Silicon microphone with softly constrained diaphragm: A microphone sensing element and a method for making the same are disclosed. The sensing element has a diaphragm and an attached electrical lead-out arm preferably made of polysilicon that are separated by an air gap from an underlying backplate region created on a conductive silicon substrate. The backplate region...

20060093172 - Hearing aid system, a hearing aid and a method for processing audio signals: A composite hearing aid system comprises two hearing aids (11, 31) with respective microphones (12, 32) and electronic receivers (17, 37), a microphone (42) and a transmitter (41) adapted to transmit the signal from the microphone (42) to the electronic receivers. At least one of the hearing aids (11, 31)...

20060093174 - Hearing aid: It is intended with a hearing aid that an electromagnetic interference field generated in the hearing aid device itself and acting on a transmit and/or receive antenna (7) should be attenuated or compensated for in a simple fashion. It is proposed to this end that the supply lines (6C, 6D)...

20060093173 - Method and signal processor for reducing feedback in an audio system: Feedback in audio systems and particularly in hearing aids needs to be detected more reliably, so that it can be filtered as appropriate. For this purpose, the invention provides for the output signal from a signal processing section is modified using a modulation unit to produce a modulated output signal....

20060093175 - Hearing-aid anchoring element: A hearing aid anchoring fixture (104) for anchoring a direct bone conduction hearing aid (108) to the skull bone (106), comprising a threaded portion (110) that has at least one cutting edge (118). Each cutting edge (118) has an adjacent cavity (120) having a volume Vc. The threaded portion (110)...

20060093176 - Customized in-ear interface for acoustic equipment and method: An in-ear interface comprises an ear module shaped to be received in an ear canal. The ear module has a core defining a sound bore for enabling sound transmittance into the ear canal. A sheath covers a portion of an outer surface of the core so as to define an...

20060093177 - Microphone attachment device: Presented is device that attaches a microphone to a circuit substrate and includes a main holder unit holding a microphone and a main socket unit holding the main holder unit. Mounted in the main holder unit are inner contact pieces coming into contact with output terminals of the microphone when...

20060093178 - Eye-wear with built-in audio: An eye-wear comprising a viewing frame, a pair of arms extending from the viewing frame, audio circuitry, a pair of ear-pieces and a battery compartment, wherein the pair of ear-pieces are respectively and detachably attached to the pair of arms and each ear-piece is connected to the audio circuitry and...

20060093179 - Electro-acoustic audio transducer: A dynamic transducer having a voice coil attached to and suspended between two diaphragms that comprise two opposite sides of an enclosure. The voice coil is suspended within the enclosure on a center support that passes through the enclosure and is attached to the diaphragms. Within the enclosure, an annular...

20060093180 - Magnetic circuit having dual magnets, speaker and vibration generating apparatus using the same: A magnetic circuit having a dual magnet, a speaker and a vibration generating apparatus using the same are provided. The magnetic circuit includes a magnetic gap having a small magnetic loss and an increasing magnetic flux density, in which a uniform distribution of a line of magnetic force can be...

20060093181 - Diaphragm for speaker device and speaker device including the diaphragm: A speaker device includes a vibration system having a voice coil bobbin, a diaphragm and a cap, and a magnetic circuit system. The diaphragm has a first fixing portion, a main cone portion, a second fixing portion, a drive cone portion and an opening. The first fixing portion is provided...

20060093182 - Speaker: A speaker is provided, by which a voice coil bobbin can be prevented from coming in contact with a yoke, thereby preventing the voice coil bobbin from being deformed. The speaker includes a diaphragm unit, magnetic circuit unit, case and restriction member. The diaphragm unit includes a diaphragm, damper and...