Abstract: An apparatus including a housing and a sleeve that engages and at least partially encloses the housing. The housing may include a top portion having a loudspeaker and an exterior surface and a bottom portion having a loudspeaker and an exterior surface. An audio diffuser may be positioned between the top portion of the housing and the bottom portion of the housing so as to radially disperse sound from the loudspeakers. A light ring on the housing may indicate a functional state of the apparatus. Protrusions on the housing may interact with indentations on the sleeve to position and align the housing within the sleeve. The sleeve may include holes to allow sound to be outputted from the loudspeakers. Magnets and alignment elements may further situate and secure the housing to the sleeve.

Abstract: A diffuser which forms a first acoustic passage that sound waves propagate and which radiates the sound waves to an outer diameter direction between a diaphragm and an annular conical surface of a first reflection member, and forms a second acoustic passage the sound waves which pass the opening of the first reflection member propagate and which radiates the sound waves to an outer diameter direction between the annular concave surface of the first reflection member and a conical surface of a second reflection member.

Abstract: An acoustic apparatus and method produces an acoustic signal in response to an electrical input signal applied to an acoustic receiver. The acoustic signal is converted to an electrical output signal that is proportional to a sound pressure of the acoustic signal, using an electro-acoustic transducer. In some embodiments the apparatus and method determine whether there is a change in the acoustic signal indicative of a change in an acoustic load coupled to the receiver by comparing the electrical output signal to reference information. The change in acoustic load, in one example, is attributable to ear wax accumulation in an output of the acoustic receiver or acoustic passage in the ear canal of a user or is attributable to seal leakage.

Abstract: The present disclosure includes solid-state transducers, a system, and a method. In one embodiment, a solid-state transducer includes a housing, a first end portion, a second end portion, a plurality of electrical conductors, and a thin-film resistive material. The thin-film resistive material is disposed between and in electrical communication with a plurality of electrical conductors. The thin-film resistive material is configured to receive one or more electrical signals from the plurality of electrical conductors, and generate thermal oscillations to create pressure waves in a medium in response to receiving the one or more electrical signals.

Abstract: Loudspeakers are described that may reduce comb filtering effects perceived by a listener by either 1) moving transducers closer to a sound reflective surface (e.g., a baseplate, a tabletop or a floor) through vertical (height) or rotational adjustments of the transducers or 2) guiding sound produced by the transducers to be released into the listening area proximate to the reflective surface through the use of horns and openings that are at a prescribed distance from the reflective surface. The reduction of this distance between the reflective surface and the point at which sound emitted by the transducers is released into the listening area may lead to shorter reflected path that reduces comb filtering effects caused by reflected sounds that are delayed relative to the direct sound. Accordingly, the loudspeakers shown and described may be placed on reflective surfaces without severe audio coloration caused by reflected sounds.

Abstract: An omni-directional speaker includes a speaker enclosure including a sound wave exit configured to emit sound waves omni-directionally. A transducer is coupled to the speaker enclosure. The transducer including a speaker diaphragm coupled to a mounting plate. A phase plug directs sound to the sound wave exit. The phase plug including a first portion that extends outwards toward an exterior of the speaker enclosure.

Abstract: A desktop audio loudspeaker system, for placement on a desktop used a work surface by a listener, includes an enclosure for placement on or above the desktop, the enclosure having a front surface; a first loudspeaker mounted in the enclosure, the first loudspeaker radiating sound from the enclosure, past the front surface, in a direct path to ears of the listener. This embodiment also includes a first reflective element having a surface, the first reflective element mounted in relation to the enclosure so as to reduce multipath effects caused by reflection of sound by the desktop, wherein the surface of the first reflective element is disposed transversely with respect to the front surface of the enclosure, and forming an angle with the front surface, to reflect sound, emanating from the first loudspeaker, away from the desktop in a direction that avoids a direct path to ears of the listener.

Abstract: An apparatus including a sound transducer; and a housing having the sound transducer connected thereto. The housing forms a substantially sealed air space back cavity acoustically coupled to the sound transducer. The housing includes a housing member having a first dividing structure located in the back cavity to connect two adjacent air mass sections of the back cavity, where the dividing structure includes at least one aperture to permit travel of sound waves through the at lease one aperture between the air mass sections.

Abstract: An acoustic device configured for use with an audio source. The acoustic device includes a stem portion and multiple branches forming a cavity for passage of an audio signal when connected to an audio source. An array of multiple acoustic devices or nodes may be physically connected to form a tree-like structure for providing amplified sound in an aesthetically and tonally pleasing manner which fills its surrounding with sound. In view of the physical connectability of the individual nodes, an audio outputting device may be form which is easily modified, scaled, and/or re-configured to adjust its tonal properties and directionality.

Abstract: A directional sound generating apparatus and a directional speaker array including the same are disclosed. The directional sound generating apparatus includes a sound transducer, a reflection plate which is located behind the sound transducer, and a blocking plate which is provided between a front portion and a back portion of the sound transducer.

Abstract: An apparatus is disclosed for enhancing the sound level of portable devices by providing a sound reflector between the portable device and a case. The sound reflector includes a shield which functions to redirect output from rear facing speakers toward the front. The sound reflector can be extended for redirecting sound or retracted when not in use. A case incorporating a retractable sound reflector is also disclosed.

Abstract: An audio device incorporates first acoustic driver at least partially overlain by a first acoustic reflector to define a first effective direction of maximum acoustic radiation and a second acoustic driver at least partially overlain by a second acoustic reflector to define a second effective direction of maximum acoustic radiation, wherein when the audio device is positioned in a room such that the direction of maximum acoustic radiation of the first acoustic driver is substantially perpendicular to the direction of the force of gravity, the first effective direction of maximum acoustic radiation is bent more towards a listening position at which a listener is expected to be located than the first direction of maximum acoustic radiation and away from a floor, and the second effective direction of maximum acoustic radiation is bent more towards the listening position than the second direction of maximum acoustic radiation and away from a wall.

Abstract: A high directivity boundary microphone (10) is disclosed, build up of a normal unidirectional microphone element (12) with cardioid-directivity behavior. The microphone element (12) is placed on a holder plate (14), with a membrane (16) of the microphone element (12) facing a plane (18) where a holder (20), comprising the holder plate (14) and a holder feet (22), is placed upon. The holder (20) ensures that the microphone element (12) is aligned at an angle (24) of preferably 35° respective to the plane (18). In this position, the microphone element (12) can detect direct sound (26) in a defined speech area (28A, 28B) as well as delayed sound (30) that is reflected at the plane (18) beneath the microphone element (12). Outside the defined speech area (28A, 28B) the sensitivity is strongly reduced.

Abstract: Method, user terminal and computer program product for controlling audio signals at the user device during a communication session between the user device and a remote node, in which a primary audio signal is received at audio input means of the user device for transmission to the remote node in the communication session. It is determined whether the user device is operating in (i) a first mode in which secondary audio signals output from the user device are likely to disturb the primary audio signal received at the audio input means, or (ii) a second mode in which secondary audio signals output from the user device are not likely to disturb the primary audio signal received at the audio input means.

Abstract: A portable apparatus including a main body and a receiver is provided. The main body has a surface, an active sound hole and a passive sound hole. The active sound hole and the passive sound hole are both disposed at the surface of the main body. The receiver is disposed inside the main body and arranged for emitting a first sound wave and a second sound wave with the same amplitude and frequency but opposite transmission directions. The first sound wave is transmitted out of the main body via the active sound hole and the second sound wave is guided in the main body and transmitted out of the main body via the passive sound hole.

Abstract: The present invention relates to an audio generator comprising, a first and a second transducer element, and the first transducer element has a first membrane having a surface which is non-flat, and a reflector, wherein the reflector has a surface with a non-flat contour and the reflector co-operating with directive guiding walls so as to lead and guide audio pressure waves to propagate in predetermined directions.

Abstract: An electronic device includes an internal speaker module and an external sound box detachably applied to the internal speaker module. The valve is resisted to the opening to cover the opening of the internal speaker module. When external sound box is applied to the internal speaker module, the connector is magnetically attracted with the magnetic attracter, while the valve is magnetically repelled from the connector and moves away from the opening to open the opening, thereby the external sound chamber is communicating with the internal sound chamber.

Abstract: A loudspeaker in which a magnetic particle filter is provided in the vicinity of a sound outlet port.

Abstract: The invention provides in some aspects a loudspeaker, for example, configured in a band-like shape and suitable, for example, for wearing as a wristband, armband, legband or the like. A related aspect of the invention is to provide such a wearable loudspeaker comprising a band-shaped enclosure, a driver that is mounted in the enclosure, and an active diaphragm that is coupled to the driver to generate sound waves directed outwardly from the enclosure (referred to below as “outwardly directed waves,” “outward waves” and, more often, by analogy to a conventional, non-wearable loudspeaker “frontward-directed sound waves” or, more simply, “front waves”) and backward-directed sound waves (“back waves”) directed inwardly into the enclosure (referred to below as “inwardly directed waves,” “inward waves” and, more often, by analogy to a conventional loudspeaker “backward-directed waves” or, more simply, “back waves”).

Abstract: Embodiments provide apparatuses and systems which include a front surface, a back surface, and a second back surface. A speaker may be disposed between the front surface and the back surface. The speaker is to direct audio substantially orthogonally through the back surface. The second back surface is to enable an acoustic response from the speaker. A method is also provided which enables a computing device to determine whether it is engaging a surface. In response to the determination, the computing device may adjust the audio signal provisioned to a speaker directed orthogonally to the surface, and output the audio signal to provision an omni-directional acoustic response.

Abstract: A low frequency exponential folded horn enclosure employing a bifurcated horn terminal pathway and a single driver with a bifurcated throat channel, with driver access from the top or bottom of the enclosure. The horizontal “butterfly” throat is located at the rear of the enclosure and expands vertically, and the vertically arranged bifurcated horn terminus exhausts in a mostly forward direction on opposite sides of the back chamber which is reflex-ported; said ports arranged to each exhaust into the channel folds at each respective corner of the terminal horn channel.

Abstract: Method, user terminal and computer program product for controlling audio signals at the user device during a communication session between the user device and a remote node, in which a primary audio signal is received at audio input means of the user device for transmission to the remote node in the communication session. It is determined whether the user device is operating in (i) a first mode in which secondary audio signals output from the user device are likely to disturb the primary audio signal received at the audio input means, or (ii) a second mode in which secondary audio signals output from the user device are not likely to disturb the primary audio signal received at the audio input means.

Abstract: The present invention is an extremely low frequency (ELF) microphone and acoustic measurement system capable of infrasound detection in a portable and easily deployable form factor. In one embodiment of the invention, an extremely low frequency electret microphone comprises a membrane, a backplate, and a backchamber. The backchamber is sealed to allow substantially no air exchange between the backchamber and outside the microphone. Compliance of the membrane may be less than ambient air compliance. The backplate may define a plurality of holes and a slot may be defined between an outer diameter of the backplate and an inner wall of the microphone. The locations and sizes of the holes, the size of the slot, and the volume of the backchamber may be selected such that membrane motion is substantially critically damped.

Abstract: 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, which vent may have a meandering path or may comprise tapering portions or cavities defining acoustical properties thereof.

Abstract: A speaker system includes: a speaker cabinet; a speaker unit installed in a wall surface of said speaker cabinet; and an acoustic tube having ends, one of which is open and the other of which is closed, in which said acoustic tube is provided in said speaker cabinet such that a side wall surface of said acoustic tube crosses a direction in which standing waves propagates, the waves occurring inside said speaker cabinet.

Abstract: A variable directional microphone assembly and method of manufacturing the variable directional microphone assembly which includes a substrate, a semiconductor integrated circuit device, two microphone devices, a microphone body, and a case.

Abstract: An acoustic waveguide system, having source of acoustic radiation and a source of opposing acoustic radiation. An acoustic waveguide has an open end and an interior. A first acoustic driver having a first radiating surface and a second radiating surface is arranged and constructed so that the first radiating surface radiates sound waves into free air and the second radiating surface radiates sound waves into the acoustic waveguide so that sound waves are radiated at the open end. A source of opposing sound waves in the acoustic waveguide opposes a predetermined spectral component of the sound waves radiated into the acoustic waveguide to reduce the acoustic radiation of the predetermined spectral component from the acoustic waveguide.

Abstract: A child soothing device includes a frame comprising a structural support, a housing coupled to the structural support and comprising a cover with an opening, and a speaker including a speaker driver and a speaker chamber. The speaker driver has a diaphragm disposed relative to the opening in the cover for external sound wave propagation via displacement of the diaphragm, and the speaker chamber has a volume defined by the housing and in communication with the diaphragm for internal sound wave propagation via the displacement of the diaphragm. The device further includes a partition within the housing to further define the volume of the speaker chamber. The volume may include a region obliquely oriented relative to the diaphragm to support a low frequency response of the speaker.

Abstract: This invention is to provide a sound reproduction device including a tube, a loudspeaker and a resonance unit, wherein the loudspeaker includes a frame body having a side adjacent to a first diaphragm thereof peripherally fixed to a first opening of the tube, and the resonance unit includes a second diaphragm peripherally fixed to a second opening of the tube and a weighting element fixed at a central position of the second diaphragm. Thus, a closed resonance chamber is defined within the tube between the loudspeaker and resonance unit. When the loudspeaker is driven, the first diaphragm is vibrated and in turn vibrates air in front of the sound reproduction device to make sound and drives the second diaphragm to vibrate air behind the sound reproduction device synchronously in the same direction, thereby producing twice as strong low-frequency sound effect as a traditional sound reproduction device without a resonance unit.

Abstract: A microphone pop filter for attenuating plosive artifacts utilizes a substantially acoustically transparent material configured to define multiple airfoil surfaces that are oriented non-orthogonally relative to an axis defined between an audio source and a microphone diaphragm, with the substantially acoustically transparent material disposed intermediate the audio source and the microphone diaphragm and separated from the microphone diaphragm by an airspace. Plosive artifacts from the audio source may be deflected away from the microphone diaphragm by the airfoil surfaces to reduce the impact of such artifacts on the microphone diaphragm and the resulting electronic signal output therefrom.

Abstract: An enclosure includes a chamber holding a driver with an end at a first opening in a housing and a rear end nearby a first terminal end of a passageway having a second terminal end at a second opening in the housing. The driver projects sound waves into a listening area directly through the first opening and simultaneously projects sound waves along the passageway and out the second opening into the listening area. The passageway comprises expansion and compression zones of different cross-sectional areas.

Abstract: A variable directional microphone assembly and method of manufacturing the variable directional microphone assembly which includes a substrate, a semiconductor integrated circuit device, two microphone devices, a microphone body, and a case.

Abstract: A broadband sound generator and transmitter provides minimal attenuation of sound over the distance between the generators and a point at a selected distance. The transmission component includes a parabolic dish and a positionable framework for the sound generators. The sound generators are positioned in front of the dish and oriented to direct sound into the dish for reflection toward a target. Drive signal conditioning circuitry apportion components of the drive signal to the several sound generators and adjust the signal in terms of delay and phase to accommodate changes in position of the generators relative to the dish.

Abstract: A loudspeaker assembly includes a loudspeaker located at the position of one of the focuses of a reflector, whose over-internal wall section constitutes a part of an ellipse, in such a manner that the sounds-releasing surface of the loudspeaker is oriented to be opposite to the internal wall surface of the reflector.

Abstract: A home appliance and home appliance system are provided. The home appliance may include an input device, through which an input signal is received from a user, and a control panel, into which the input device is inserted and connected, including a sound through-hole through which sound information passes. The home appliance may further include a sound output device disposed on a rear surface of the control panel that outputs the sound information corresponding to product information of the home appliance through the sound through-hole to outside of the home appliance. A gap may be formed between the input device and the sound through-hole into which the input device is inserted. Therefore, the sound information output from the sound output device may be transmitted to the outside through the gap. The home appliance may further include a sound guide, such that the sound information transmitted from the sound output device may be efficiently transmitted to the sound through-hole.

Abstract: In order to establish a communication connection between two subscribers in a direct communication network, signaling information containing subscriber address information is exchanged between subscribers participating in the communication connection. The communication connection is directly established between the subscribers participating in the communication connection on the basis of the subscriber address information. According to the invention, the following steps are carried out: first, subscriber address information of at least one target subscriber required for establishing a paired communication connection between the subscribers is stored in a first subscriber; the stored subscriber address information of the target subscriber is then transmitted to a calling subscriber by the first subscriber; and the calling subscriber uses said subscriber address information in order to establish the communication connection between the calling subscriber and the target subscriber.

Abstract: A sound reproduction system is disclosed in which a sound enclosure defines a soundwave path having a first end, a second open end and at least one bend therebetween. At least one driver is provided at the first end for producing a driver soundwave that is confined by the sound enclosure for travel along the soundwave path. At least one baffle member is situated in the soundwave path, defining a reflective surface of preselected shape that reflects and constricts the soundwave therethrough.

Abstract: A narrow profile speaker unit comprises at least one speaker outputting sound towards an internal surface and through a duct with an output terminus, such as a slot, having a narrow dimension, effectively changing the cross-section of the speaker's audio output wave. A pair of speakers may face one another, outputting sound towards a common output slot. Multiple pairs of speakers may be used to form an inline speaker unit for increased sound output. A slotted speaker unit may include multiple speakers facing the same direction, towards a groundplane or reflecting surface, and having parallel apertures for allowing sound radiation. The speaker units may be integral with or attached to electronic appliances such as desktop computers or flatscreen devices, or may be used in automobiles or other contexts.

Abstract: A low frequency folded horn enclosure intended for use in proximity with at least one planar surface with access to the horn throat from the top of the enclosure. The horn is bifurcated at the throat and folds horizontally around a central trapezoid-shaped columnar back chamber which includes a phase-inverting means. The throat channel expands vertically to the single fold and expands vertically and horizontally to the horn mouth, maximizing back chamber volume within the constraints imposed by footprint size, frequency response, and driver characteristics.

Abstract: A low frequency exponential bass horn enclosure employing a bifurcated horn pathway and twin throats, convertible to a variety of front-loaded or rear-loaded configurations without modifications by the use of interchangeable parts, with driver access typically from the front. Optimized for corner placement but fully enclosed horn channel allows for floor or wall use. The horizontal “butterfly” throat is located at the rear of the enclosure and expands vertically, and the vertically arranged horn terminus exhausts in forward-canted splay angles around a partially rectangular back chamber.

Abstract: A low frequency exponential bass horn enclosure employing a large area unitary throat pathway, bifurcated at a substantially parabolic rearward channel wall, convertible to a front-loaded or rear-loaded configuration by the use of interchangeable parts, with driver access from the front. Intended for corner placement, however, fully enclosed horn channel allows for floor use. The axially-centered throat expands vertically, exhausts rearward, and is bifurcated at the back of the enclosure with two hard reflection points, comprising a single fold, in which the vertically arranged horn terminus exhausts with a forward-canted splay angle around a partially rectangular back chamber.

Abstract: An acoustic waveguide system, having source of acoustic radiation and a source of opposing acoustic radiation. An acoustic waveguide has an open end and an interior. A first acoustic driver having a first radiating surface and a second radiating surface is arranged and constructed so that the first radiating surface radiates sound waves into free air and the second radiating surface radiates sound waves into the acoustic waveguide so that sound waves are radiated at the open end. A source of opposing sound waves in the acoustic waveguide opposes a predetermined spectral component of the sound waves radiated into the acoustic waveguide to reduce the acoustic radiation of the predetermined spectral component from the acoustic waveguide.

Abstract: In a loudspeaker device of the present invention, an interior space of a cabinet is parted into first and second chambers, a diaphragm on which ring-shaped magnetic boards are fixed is attached to a parting board via an edge portion, and ring-shaped fixed magnets are provided so as to face the magnetic boards, respectively. Vibration of the diaphragm vibrated by sound pressure from a speaker unit is intensified by forces of attraction of the magnets in order to reduce an acoustic stiffness of the cabinet and equivalently increase a cabinet volume, thereby realizing satisfactory bass reproduction with a small cabinet.

Abstract: An acoustic waveguide system, having source of acoustic radiation and a source of opposing acoustic radiation. An acoustic waveguide has an open end and an interior. A first acoustic driver having a first radiating surface and a second radiating surface is arranged and constructed so that the first radiating surface radiates sound waves into free air and the second radiating surface radiates sound waves into the acoustic waveguide so that sound waves are radiated at the open end. A source of opposing sound waves in the acoustic waveguide opposes a predetermined spectral component of the sound waves radiated into the acoustic waveguide to reduce the acoustic radiation of the predetermined spectral component from the acoustic waveguide.

Abstract: A head set speaker and stereo radio playing device exhibits improved harmonics and acoustic fidelity. A resilient and flexible headpiece is sized to fit behind the head of the user. Right and left device enclosures are carried by the ends of the headpiece, and are aerodynamic shaped to minimize wind whistle which may result when the head set is worn while moving rapidly. Right and left behind the ear flanges extend downwardly from a position adjacent to the ends of the headpiece, and aid in the positioning of the right and left ear device enclosures. In a typical application, the device enclosures are positioned immediately forward of the user's ears, allowing ambient sound to be heard. A speaker assembly and a removable battery assembly are carried within each device enclosure. The speakers are oriented within the device enclosures with the speaker magnet directed to, and in contact with, the head of the listener. This achieves two interrelated and significant structural and electronic advantages.

Abstract: A low frequency exponential horn enclosure intended for corner use with access to the horn throat and entire volume of the back chamber from the top of the enclosure, allowing operation as either a front or back loaded horn. The horn is bifurcated at the throat and folds horizontally around a central triangle-shaped columnar back chamber, the sides of which form part of the horn channel, forming a simple structure with little void space.

Abstract: An acoustic impedance matching enclosure is provided having a driver loaded into a chamber buffering the throat/mouth of a closed loop transmission line. Transmission line consists of a termination member, outer and inner enclosure walls, high-density lining and throat/mouth area. Transmission line eliminates internal random standing waves while providing variable-frequency standing waves that through superposition of the waves compensates for mass-acceleration loss of the high-end of the driver output while damping the resonance of the driver. Alternative application of the acoustic impedance matching enclosure is that of compression loading the driver directly into the closed loop transmission line and using an acoustic low pass filter to translate the output into low frequencies only through a port.

Abstract: A method and apparatus for reducing the acoustic coupling between a sound receiving transducer and a sound transmitting transducer is disclosed. A housing, wherein the receiving transducer and the transmitting transducer are mounted, is provided to increase the acoustic separation between the receiving transducer and the transmitting transducer. The housing has a surface, which may have an acoustic impedance condition, which is preferably resistive. The housing may further act as a barrier structure between the receiving transducer and the transmitting transducer.

Abstract: A coincident source stereo speaker in accordance with the present invention includes a high-frequency component (tweeter) and a low-frequency component (woofer) that are separated by a sound channel. The tweeter emits a first sound pattern directly outward from the speaker, with the sound pattern having a corresponding high frequency center axis. The sound channel is located between the tweeter and woofer and is symmetrically oriented around the high-frequency component. The woofer emits a second sound pattern into the sound channel for re-direction out of the speaker. With this configuration, the second sound pattern has an effective low frequency center axis that is coincident with the high frequency center axis. As a result, the tweeter and woofer exhibit co-axial performance characteristics, even though they are not physically located co-axially.

Abstract: A speaker system suppresses standing waves generated in the system and reproduces clear and dynamic bass sound. The system includes a cabinet formed of acoustic insulation walls, and at least one partition wall situated inside the cabinet to form a space by surrounding the space. The partition wall suppresses the standing waves generated inside the cabinet and is formed of a material having high internal loss. The space has a total capacity more than one tenth of a capacity of the cabinet, wherein a closed end of the partition wall is located between one-half and four-fifths of a distance from one end to the other end, and an opening area of the same partition wall is located at a side opposite to the closed end in a longitudinal direction of the cabinet. The opening area is located between four-fifths and five fifths of a distance from one end to the other end. The material has a density per volume greater than 0.1 g/cm3, a density per area from 0.01 g/cm2 to 0.