Abstract: An electromagnetic electroacoustic transducer, includes: a diaphragm; a magnet; an electromagnetic coil; and a casing for storing the diaphragm, the magnet and the electromagnetic coil therein. The case has at least one first sound emitting hole through which a front space on a front surface of the diaphragm in the casing communicates with a front outer space in front of the casing and at least one second sound emitting hole through which a rear space on a rear surface of the diaphragm in the casing communicates with the front outer space in front of the casing. A resonant frequency Fv2 of the rear space is set at a value in the range: F0<Fv2?Fv1 in which F0 is a resonant frequency of the diaphragm, and Fv1 is a resonant frequency of the front space.

Abstract: An acoustic structure includes a first, rigid panel (7), a second, rigid panel (11) aligned in spaced, substantially parallel, relationship with the first panel (7), a multiplicity of partition walls (15) running transverse to the panels of the panels (7, 11) and dividing the interior space of the enclosures into a single layer of cells (17) bounded at one face by the inside of the first panel (7) and bounded at the opposite face by the inside of the second panel (11), the partition walls (15) being bonded at the one face to the inside of the first panel (7) and at the opposite face to the inside of the second panel (11), and a multiplicity of apertures (19) in the partition walls (15) providing communication between adjacent cells of the single layer of cells (17).

Abstract: The system consists of 2 large speakers (1A & 1B), and 2 small full range speakers (2A & 2B) having about half the active cone area as the large speakers, mounted in a dual chamber enclosure (3) with the large speaker (1A) mounted on an internal baffle (4) forming a partition for a large bass reflex chamber (3A), with the large speaker (1B) mounted in common direction thereto immediately in front thereof together with the 2 smaller speakers (2A & 2B) mounted adjacent thereto on a front baffle (7) forming a small tympanic chamber (3B) by and with the large speakers (1A & 1B) and small speaker (2B) electrically connected to operate in common acoustic phase to each other with the other small speaker (2A) connected to operate in opposing phase thereto.

Abstract: A speaker system is provided which includes a sound box and a speaker mounted in the sound box. The sound box is divided into a plurality of air chambers, each of which is formed with at least an air dissipating hole connecting the atmosphere of the box and at least an air passing hole connecting at least a neighboring air chamber, so as to generate behind the speaker pressurized air cushions corresponding to each frequency band of the frequency response of the speaker. Meanwhile, upon reaching the air dissipating hole of each air chamber the air cushions are generated depressurized and vanished at an appropriate timing so that formerly air cushions do not interfere with those generated in succession; therefore each frequency band of the frequency response of the speaker is provided with an appropriate and independent pressurized air cushion so that high fidelity sound frequencies can be reproduced.

Abstract: A loudspeaker system has a diaphragm for producing sound, a loudspeaker driver mechanism operable for moving the diaphragm in response to an applied electrical signal from an audio signal source, a blower positioned for directing air under pressure over the loudspeaker driver mechanism so that heat generated by the loudspeaker driver mechanism can be convectively removed, and a control circuit electrically connected to the blower and adapted for connection to the audio signal source such that an increase in the applied electrical signal causes a corresponding increase in speed of the blower. The control circuit includes a power limiting device and a switching device that is connected in parallel with the power limiting device. The switching device is actuable from a normally closed state to an open state when the applied electrical signal is above a predetermined level to regulate the speed of the blower.

Abstract: This invention has been made to provide a speaker system capable of miniaturization and presenting a good sound quality. A speaker 15 is mounted on a printed circuit board 21 arranged inside a telephone body enclosure 12. Acoustic waves of positive phase produced by vibration of a diaphragm 23 of the speaker 15 are output through front acoustic apertures 28 and a front air chamber 37 to the exterior from an enclosure acoustic aperture 13. On the other hand, the acoustic waves of opposite phase enter a rear air chamber 35 through rear acoustic apertures 29, reach an enclosure internal space 36 through an opposite-phase opening 34 provided by cutting away a part of a rear sealing member 32, and transmit to a card slot 14, then being output to the exterior.

Abstract: A speaker cabinet includes a cabinet having a side board to which a speaker driver can be fixed, a substantially cylindrical tube which is inserted into the cabinet such that a vertical line passing through the center of gravity of a horizontal plane of the cabinet coincides with the axis of the substantially cylindrical tube and which is in contact with the base board and the top board of the cabinet, and a support rod which is inserted into the substantially cylindrical tube through a through-hole formed in the base board of the cabinet and which supports the top board of the cabinet at the upper end portion of the support rod such that the cabinet undulates so as to move like a see-saw.

Abstract: A speaker has a very small size and is arranged to emit sound waves in a non-directional manner. The speaker includes a case and a speaker unit attached to a plate provided at an opening of the case. The speaker is arranged so that the speaker unit is mounted or attached to a floor or support surface such that a space formed by the case, the plate and the speaker unit is airtight and so that the back-and-forth motion of a vibrator of the speaker unit generates expansion and contraction of the case.

Abstract: A speaker system features a plurality of transducers arranged to produce a sound field similar to that of an acoustic point source. The arrangement of transducers optimizes the sound field by reducing the sound energy directed towards the primary reflective surfaces within the room in which they are placed. In a preferred embodiment, four medium-size transducers (woofers) operate together to reproduce the low-range to mid-range frequencies with the woofers positioned so that no two woofers share a common vertical axis or a common horizontal axis, and so that the horizontal and vertical axes of the woofers are evenly spaced. Preferably a center of a fifth transducer, a high frequency tweeter, is placed at the center of a pattern formed by the center of the woofers. The fifth transducer is set at a depth within the enclosure that is at the same acoustic center as the acoustic center of the woofers.

Abstract: A loudspeaker and switch assembly is adapted to require a reduced mounting space and incorporates a coaxially mounted switch for power selection having its shaft extending through the loudspeaker driver's pole piece. The switch is mounted to the back plate and the switch shaft runs through the pole piece so that the user can select power via a knob mounted on the proximal or front end of the switch of the loudspeaker dust cap. The power selection knob is used to turn the switch and select an input power level to the speaker, and the body of the knob also defines an axially symmetrical curvilinear or contoured solid shape which functions as an acoustic diffuser to increase the uniformity of the radiation pattern for higher frequencies which would otherwise be narrowly beamed into an area directly in front of the loudspeaker diaphragm.

Abstract: An electromagnetic electroacoustic transducer, includes: a diaphragm; a magnet; an electromagnetic coil; and a casing for storing the diaphragm, the magnet and the electromagnetic coil therein. The case has at least one first sound emitting hole through which a front space on a front surface of the diaphragm in the casing communicates with a front outer space infront of the casing and at least one second sound emitting hole through which a rear space on a rear surface of the diaphragm in the casing communicates with the front outer space in front of the casing. A resonant frequency Fv2 of the rear space is set at a value in the range: F0<Fv2≦Fv1 in which F0 is a resonant frequency of the diaphragm, and Fv1 is a resonant frequency of the front space.

Abstract: The invention provides a loudspeaker system having a housing made of a plastic casing and a foam positioned against the interior walls of the casing through a reaction between the foam and the interior wall. The foam increases the stiffness of the walls as well as provides sound damping. Additionally, the foam may create a foam rib between a stud and the casing to support the stud and transfer the stiffness of the stud to a wall of the casing.

Abstract: A speaker enclosure (10) comprising a speaker box (12) having an opening (27) and adapted for mounting within a wall (20) upon a wall stud (22); a compressible gasket (14) affixed about the box opening (27); a faceplate (16); and a plurality of independently adjustable coupling mechanisms (18) for coupling the faceplate (16) with the box (12). The protruding, uncompressed gasket (14) is compressed by the faceplate (16) and the coupling mechanisms (18), which may be independently adjusted to provide an optimum and substantially uniform degree of separation between faceplate (16) and wall (20), thereby reducing distortion, vibration, and damage due to undesirable contact therebetween. A spring (160) is provided to prevent over-compression of the gasket (14) due to heavy or low frequency speakers, thereby facilitating maintaining the uniform degree of separation; and a spacer (162) is provided to maintain the spring (160) in its operating position.

Abstract: Acoustic diffuser comprising a containing element able to contain at least a loudspeaker, wherein the containing element is formed by a monocoque made with granules of solid mineral held together by a cohesion material.

Abstract: A casing for an acoustic equipment formed mainly of a filler and a thermosetting or thermoplastic resin. The filler is comprised of a cellulose-based powdered material, such as wooden powders obtained on crushing a wooden material and an powdered material smaller in size and harder than the cellulose-based powdered material. The powdered material is secured or deposited under a pre-set pressure on the surface of the cellulose-based powdered material.

Abstract: A loudspeaker having an improved air cooling system. The loudspeaker includes a speaker frame, a diaphragm connected to the speaker frame, a voice coil which is formed on a voice coil bobbin and is connected to the diaphragm for vibrating the diaphragm, a permanent magnet having a central opening, a pole piece disposed coaxially within the central opening of the permanent magnet to form an air gap into which the voice coil is disposed, and a heat transfer plate disposed over the permanent magnet. The heat transfer plate has a plurality of cooling fins which are radially outwardly extending toward an outer rim thereof and inner and outer air openings on the outer rim. The outer rim has a step like shape in cross section and has a flat upper surface which is higher than top ends of the cooling fins. The vibration of the diaphragm produces air flows through air passages on the heat transfer plate between the inside and outside of the loudspeaker.

Abstract: This invention provides a speaker enclosure that minimizes or defuses standing waves and minimizes resonance within the operating frequency range of its transducers. To minimize standing waves, the speaker enclosure has no two surfaces that are parallel to each other thus preventing the propagation of standing waves. The interior surface of the speaker enclosure may have ribs spaced apart on any surface that is prone to resonate so that the surface is strengthened such that it resonates at a predetermined frequency that is typically outside of the operating frequency range of the transducers.

Abstract: A speaker holder includes a speaker engagement portion (52) abutting the bottomed cylindrical portion (26A) of the frame (26) of the speaker (10) and a plurality of engagement legs (54) extending from the speaker engagement portion (52). The speaker (10) is disposed tightly between the speaker engagement portion (52) and the printed circuit board (2) and fixed thereto via the engagement legs (54).

Abstract: An improved speaker enclosure system and method is described which includes extending the existing baffle of a speaker enclosure on either side. Ideally, the ratio of the height of the baffle should be 1.4 times the internal depth of the enclosure, and the width of the baffle and baffle extensions should be 1.6 times the internal depth. These ratios change for different driver configurations. The result is improved dispersion angle and perceived dimensionality of the sound produced.

Abstract: A damper 3A is provided with an inner peripheral waveform portion 11 and an outer peripheral waveform portion 12. A flat portion 10 is provided between the inner peripheral waveform portion 11 and the outer peripheral waveform portion 12. When the damper is used for a loudspeaker, the flat portion 10 does not elastically deform in a radial direction R, so that linearity of the damper 3A in a vibrating direction Z is ensured by elastic deformation of the waveform portions. In addition, a rolling phenomenon of a voice coil bobbin and a diaphragm can be suppressed.

Abstract: A speaker driver has a detachable motor and basket to allow attachment or separation of the motor assembly from the basket assembly. Two embodiments are disclosed, a thread-on detachable motor and a bolt-on detachable motor.

Abstract: A housing for a loudspeaker is presented, and which includes a plurality of corner units, each of the corner units having a first end and a second end and also has a first inner spline extending therefrom and a second inner spline extending therefrom; and a first outer spline extending therefrom and running generally parallel to the first inner spline and a second outer spline extending therefrom and running generally parallel to the second inner spline, wherein the first inner spline and the first outer spline cooperate to form a first slot sized to receive a top panel or a bottom panel and the second inner spline and the second outer spline cooperate to form a second slot sized to receive a side panel.

Abstract: A rigging system for flying a vertical stack of loudspeakers includes left and right rigging side frames (15, 17). Each rigging side frame includes a frame structure having a top end (43), a bottom end (45), and rear and front corners (51, 53, 55, 57) which is mountable to the side of a correspondingly sized loudspeaker (13). Each rigging side frame further includes a rear link (59) for pivotally linking the rear corner of a rigging frame of one loudspeaker to the rear corner of the same side rigging frame of another loudspeaker placed in stacked relation therewith, and a cam plate link (61) pivotally attached to a cam pivot point (85) at one of the top or bottom ends of the frame structure in displaced relation to the cam link. Two or more link openings (143) are provided in the cam plate link at different angles about the cam plate link pivot point and at different radial distances from the cam plate pivot point.

Abstract: A pair of matched monaural speakers are added inside conventional left and right stereo speaker housings so that the left, right and flat panel monitor appear joined in a seamless aesthetic effect. The added speakers are provided with center channel monaural sound, making it appear as though such sound emanates from the center of the monitor, thereby enhancing home theater impact to provide stereo and center channel sound from each left and right speaker housing.

Abstract: A sound producing rock having a matching body and a cap such that the cap is supported above the body in a spaced relationship to give the illusion that the cap and body are a monolithic structure. The cap and body are produced by sawing the cap from the body. A cavity is formed in the body by drilling a borehole in the body which extends downwardly from the flat body surface. A speaker is mounted in the cavity to project sound upwardly against the flat surface of the cap so that sound is projected outwardly from the space formed between the cap and body.

Abstract: An improved mounting structure for mounting a speaker onto a cabinet comprising: a base seat with a sound output hole on its surface, and with an annular inner partitioning wall therein having spaced inner protruding engaging flanges at the rim at the opening of the base seat; a speaker having a mounting ring on a frame thereof for assembling with the base seat, the ring has spaced outer protruding engaging flanges thereon; and a foam body provided on the inner wall of the frame of the speaker, the foam body is abutted against the inner partitioning wall of the base seat in an airtight mode; the base seat can be embedded in various cabinets of different modeling, the outer protruding engaging flanges on the frame of the speaker are rotated to engage with the inner protruding engaging flanges, the inner partitioning wall of the base seat abuts tightly against the foam body.

Abstract: A device (10) for producing sound, such as, for example, simulated animal calls for hunting or flatulence or other bodily noises for entertainment, using a membranous valve (17) including one or more vibrating thermoplastic or thermoset plastic membranes (18,20), wherein said vibration is mechanically induced by a gas, such as air, releasing from a reservoir (12). In a preferred embodiment, the device (10) is hand-held, portable, and broadly comprises the reservoir (12); a return (14); a focuser (16); the membranous valve (17); and an emitter (22). Gas released from the reservoir (12) is directed by the focuser (16) to pass across the one or more membranes (18,20) which are held in their operating positions by the emitter (22). Vibration of an edge portion of each membrane (18,20) produces the desired sound.

Abstract: A speaker box is comprising a hollow enclosure having opposing open ends, a molded plastic end cap acoustically sealing each of the open ends of the enclosure, and each end cap having at least one lengthwise reinforcement rib formed across a surface thereof to thereby substantially prevent the end cap from flexing under acoustic pressure. Each end cap preferably has a pair of reinforcement ribs formed on an inner surface of the end cap. The reinforcement ribs preferably intersect one another and taper upward toward the center of the end cap. The reinforcement ribs preferably extend substantially perpendicularly from the end cap. The end caps preferably have a recessed portion that recesses toward an inner surface of the end cap. An outer lip of the recessed portion provides additional rigidity to the end cap.

Abstract: An improved structure of speaker cabinet comprising a housing opened on one side thereof, and comprising a front panel, wherein, a plurality of intermediate speakers can be held firm and get increased connecting strength when the front panel is integrally connected with the housing to thereby offset the frontward and rearward thrusts of the speakers. Moreover, a plurality of hollow posts located at the positions in correspondence with those of the connecting areas of the speakers to the cabinet can be filled therein with vibration absorbing material in order to reduce vibration at the earliest time. Such a design not only can reduce volume and weight of the cabinet, but also can improve sound quality and provide a hidden port to improve beauty and waterproofing effect of the cabinet.

Abstract: An improved vehicle speaker, or woofer, that is more durable and of a higher quality than those currently available. The speaker includes a cast or machined aluminum basket that increases the strength and rigidity along with efficient cooling required to support a high-power/high-output speaker. An aluminum ring is provided for clamping the speaker assembly in place to the speaker basket. The speaker wires are connected to the speaker using a lug-lock system and has a Faraday cage to reduce interference that otherwise would harm sensitive electronic components. In a second embodiment, a speaker is designed to utilize multiple individual magnetic coils that are stacked in a series/parallel configuration to increase gauss efficiency and voice coil cooling. In a third speaker embodiment, a multi-piece aluminum basket is provided which supports the speaker's reactive and static weight while maintaining the voice coil assembly aligned inside a precision ground gap.

Abstract: An apparatus and method is disclosed for enhancing the acoustical performance of a dual chamber bass reflex acoustical enclosure. The apparatus of the invention comprises a first speaker placed within a partitioning wall between a first chamber and a second chamber of the acoustical enclosure. The apparatus of the invention also comprises a second speaker placed within an external wall of the first chamber of the acoustical enclosure. The first speaker and the second speaker are electrically connected in phase. The apparatus of the invention extends the low frequency response of the acoustical enclosure to approximately thirty Hertz.

Abstract: A modularized loudspeaker enclosure having an open-ended enclosure body, a loudspeaker support at one open end and an end structure at the other end. The enclosure body can be modified to alter the volume of the enclosure. A finally assembled enclosure can be sealed or ported. In one embodiment, the enclosure body includes a cylindrical tube cut to a length that provides a desired volume. In another embodiment the enclosure comprises standard corner, wall and end structures that constitute a component set for a constant length enclosure that can have different cross section areas.

Abstract: This invention provides a speaker enclosure that is configured to minimize diffractions from occurring. The speaker enclosure includes baffle that is tapered inward both in a vertical axis and a horizontal axis to provide a smooth transition for the wave fronts to propagate from the outer edge of the speaker housing to the atmosphere. Providing a smooth transition for the wave fronts minimizes the occurrence of eddy currents so that diffractions do not interfere with the quality of sound from the driver. To stabilize or control the wave fronts in the vertical axis, the baffle may be elongated in the vertical axis to sustain the wave front in that axis.

Abstract: A loudspeaker comprises an electroacoustic driver in an enclosure having upper and lower ends. Plates are provided at one end and fixing devices are provided at the other end of the enclosure. The plates have holes which allow them to pass over fixing devices of a vertically adjacent loudspeaker. Each of the fixing devices comprises a pillar for passing through the hole of the plate of a vertically adjacent loudspeaker and a locking element connected to the pillar and moveable between an unlocked position for passing through the hole and a locked position for holding the plate on the pillar.

Abstract: An audio box having a front panel with a driving unit fixedly mounted thereon. The driving unit includes a diaphragm driving by electronic circuit. At least a baffle tube is integrally formed with said front panel directing converted rearward audio wave forwardly thereby increasing bass effect.

Abstract: The diaphragm is supported by the frame at the outer edge thereof. The pair of terminal members is mounted on the frame, and a pair of lead wire drawn from the voice coil is fixed to the land portion of the terminal member for electrical continuity. Since the land portion is disposed on the upper side of the frame, fixation of the lead wire can be performed without turning the frame upside down. This simplifies the manufacturing process of the speaker and also prevents a breakage of the lead wire that conventionally happens when the frame is turned upside down. Further, this prevents the operator from touching the lead wire since no part of the lead wire is exposed outside the frame after the fixation.

Abstract: A one-piece speaker assembly has a speaker having a case, a gasket made of elastomer and secured to an upper portion of the case, and a connector made of elastomer and secured to an underside of the case.

Abstract: An embodiment of the invention comprises an apparatus for mounting a speaker to a wall, comprising a wall plate covering the in-wall electrical box and having an opening and a support member being coupled to the wall plate and capable of coupling to the speaker.

Abstract: This invention has been made to provide a speaker system capable of miniaturization and presenting a good sound quality. A speaker 15 is mounted on a printed circuit board 21 arranged inside a telephone body enclosure 12. Acoustic waves of positive phase produced by vibration of a diaphragm 23 of the speaker 15 are output through front acoustic apertures 28 and a front air chamber 37 to the exterior from an enclosure acoustic aperture 13. On the other hand, the acoustic waves of opposite phase enter a rear air chamber 35 through rear acoustic apertures 29, reach an enclosure internal space 36 through an opposite-phase opening 34 provided by cutting away a part of a rear sealing member 32, and transmit to a card slot 14, then being output to the exterior.

Abstract: A sounder includes a cone and a sound disk, the cone having a conical peripheral wall with a flat base, the flat base having a diameter smaller than the sound disk, the sound disk being adhered to the conical peripheral wall of the cone and defining with the flat base a sound chamber.

Abstract: A loudspeaker system has a diaphragm for producing sound, a loudspeaker driver mechanism operable for moving the diaphragm in response to an applied electrical signal from an audio signal source, a blower positioned for directing air under pressure over the loudspeaker driver mechanism so that heat generated by the loudspeaker driver mechanism can be convectively removed, and a control circuit electrically connected to the blower and adapted for connection to the audio signal source such that an increase in the applied electrical signal causes a corresponding increase in speed of the blower. The control circuit includes a power limiting device and a switching device that is connected in parallel with the power limiting device. The switching device is actuable from a normally closed state to an open state when the applied electrical signal is above a predetermined level to regulate the speed of the blower.

Abstract: A speaker holder for a speaker mounted on a printed circuit board. The speaker holder 50 comprises the speaker engagement portion 52 abutting the bottomed cylindrical portion 26A of the frame 26 of the speaker 10 and a plurality of engagement legs 54 extending from the speaker engagement portion 52. The speaker 10 is put tightly between the speaker engagement portion 52 and the printed circuit board 2 and fixed thereto via the engagement legs 54. Compared with the conventional speaker holder having separate structures for retaining the speaker and for fixing the holder to the printed circuit board 2, the mounting height of the holder 50 in state where the speaker 10 is mounted on the printed circuit board 2 via the holder 50 is considerably lowered. Further, the holder 50 is of a simple structure since a structure for retaining a speaker is not required.

Abstract: A loudspeaker system design is disclosed. The system includes a driver with a motor structure that is supported by an integrated basket-enclosure. This loudspeaker system reduces the overall size of the enclosure, and increases the efficiency of the design.

Abstract: A speaker has a very small size and is arranged to emit sound waves in a non-directional manner. The speaker includes a case and a speaker unit attached to a plate provided at an opening of the case. The speaker is arranged so that the speaker unit is mounted or attached to a floor or support surface such that a space formed by the case, the plate and the speaker unit is airtight and so that the back-and-forth motion of a vibrator of the speaker unit generates expansion and contraction of the case.

Abstract: A subwoofer cabinet having a volume less that 1 ft3 axially aligned openings in opposed cabinet walls; first and second cages mounted on respective ones of the walls in alignment with the openings; a voice coil driven driver including an annular 225 oz. magnet affixed to the first cage; a stationary pole piece extending through the magnet and defining a magnetic gap therebetween; a voice coil mounted on a cylindrical voice coil former positioned within the gap; a cone affixed to one end of the former; a first flexible surround secured to the outer end of the cone and attached at its periphery to the first cage; a flexible spider secured to the former and at its outer periphery to the first cage; a mass driven driver including a 1.7 lb. mass; a second flexible surround secured to the mass and to the second cage; a flexible spider attached to the second cage and to the mass; both surrounds having a uniform thickness of at least 0.1″, an edgeroll having a diameter of at least 1.

Abstract: A speaker system includes two cylindrical tubular cabinets. Each cabinet has a vertical longitudinal axis and defines a cylindrical cabinet cavity therein. At least one speaker element is located in each cavity. Preferably, there are upper and lower speaker elements mounted within each cavity, and dividing the cavity into upper, middle and lower speaker cavity portions. The speaker system is particularly constructed for reproduction of the very low frequency audio data below 200 Hz, and preferably below 60 Hz, which is associated with modern high fidelity sound sources such as those using a Dolby®5.1 format.

Abstract: A loudspeaker comprising a bending wave panel, an enclosure in which the bending wave panel is mounted to enclose one face of the panel, a compliant suspension between the panel and the enclosure by which the panel is supported in the enclosure, a vibration exciter attached to the panel to apply bending wave energy thereto, and an acoustic absorber in the enclosure to reduce standing waves in the enclosure, wherein the compliant suspension and the acoustic absorber are integral. A method of making such a loudspeaker is also disclosed.

Abstract: An electronic musical instrument having a keyboard and a loudspeaker, wherein the loudspeaker comprises a resonant distributed mode acoustic radiator having a stiff lightweight member having capability to sustain and propagate input vibrational energy by bending waves in at least one operative area extending transversely of thickness, and a transducer mounted wholly and exclusively on the member at a predetermined location or site within the operative area.

Abstract: A loudspeaker comprises a speaker frame and a diaphragm connected to the speaker frame for reciprocal movement relative thereto. A generally tubular former is connected to the diaphragm, and a voice coil is connected to the former at a location spaced from the diaphragm. The former is constructed of a thermally conductive material for conducting heat away from the voice coil. An airflow director is positioned at least partially in the former, with a first gap being formed between the airflow director and an inner surface of the former and a second gap being formed between the airflow director and the pole piece. The first and second gaps are in fluid communication with each other and the pole vent opening such that movement of the diaphragm causes airflow through the first and second gaps and the pole vent opening.

Abstract: A loudspeaker comprising a bending wave panel, an enclosure in which the bending wave panel is mounted to enclose one face of the panel, a compliant suspension between the panel and the enclosure by which the panel is supported in the enclosure, a vibration exciter attached to the panel to apply bending wave energy thereto, and an acoustic absorber in the enclosure to reduce standing waves in the enclosure, wherein the compliant suspension and the acoustic absorber are integral. A method of making such a loudspeaker is also disclosed.