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: 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: In a speaker apparatus equipped with a speaker unit including a magnet, a frame and a diaphragm, a speaker housing has a substantially cylindrical shape, and also has such a structure that the speaker unit is secured onto one end surface of the cylindrical shape of the speaker housing so as to substantially cover the speaker unit except for front and back surfaces of the diaphragm. Further, the speaker housing has an opening in another end surface of the cylindrical shape thereof. A support bar extends and has one end secured to a back surface of the magnet of the speaker unit. Furthermore, a weight is secured to another end of the support bar, and then, the weight holds the support bar in a substantially vertical direction and grounds the magnet acoustically and virtually, thereby attenuating and suppressing oscillation transmitted from the magnet to the support bar.

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: 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 highly compact loudspeaker which produces high fidelity, omnidirectionally propagated sound from only two sound drivers. The loudspeaker has a cylindrical, sound tight housing in which are mounted a relatively high frequency sound driver and a relatively low frequency sound driver, and optionally, an intermediate frequency sound driver. The high frequency driver is fixed at the top of the cylindrical housing, and is oriented to direct sound upwardly, away from the housing. The low frequency driver is fixed to the housing at the interior thereof, thereby dividing the housing into two sound resonating chambers. The low frequency driver directs sound downwardly into the lower of the two chambers. The bottom of the lower chamber is closed by a floor which bears a crossover network conventionally connected to the two sound drivers. The sound drivers are both coaxially centered within the housing. The loudspeaker optionally has two pairs of input signal terminals and a switch for selecting between the two pairs.

Abstract: The present invention involves a speaker system for sound reproduction. A low frequency transducer is mounted in one end of the elongated speaker enclosure, and the other end of the enclosure is at least partially open. The speaker enclosure is completely open, i.e., without stuffing, and is dimensioned such that the length of the internal chamber is about one-eighth the length of the wavelength of the lowest frequency sounds to be produced by the transducer.

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 broadband loudspeaker radiating as an approximate point source, whose movable components are fastened to a dome-shaped loudspeaker front, wherein the loudspeaker front flares rearwardly to an enclosure shell disposed coaxially around the central axis of the enclosure and a diagonally disposed deflection plane, which can be formed as the back wall, faces the back side of the diaphragm. The inside cross section of the enclosure shell is preferably a polygon with an odd number of sides, as is the dome-shaped loudspeaker front and the loudspeaker diaphragm, which is preferably cup-shaped and which can be fastened directly to the loudspeaker front.

Abstract: A system and method for providing concurrent mechanical and electrical connections to a speaker system allows full rotational motion of a speaker with respect to an enclosure. The system comprises a mechanical mounting mechanism having an integrated electrical coupling mechanism configured to establish a concurrent mechanical and electrical connection between the speaker and the enclosure. The mounting system comprises cylindrical intermating members that are configured to axially and concentrically couple with one another, which allows the speaker to have a full range of rotational motion with respect to the enclosure. Thus, the system is designed so that the cylindrical intermating members of the speaker portion of the system concentrically and axially couple with the cylindrical intermating members of the enclosure portion of the system, thereby allowing concurrent electrical and mechanical coupling between the speaker and the enclosure.

Abstract: A loudspeaker system for providing a self-contained light and sound system for entertainment. The loudspeaker system includes a loudspeaker system comprising of a housing unit attached to a cage comprising of a plurality of rods and two rim members by means of a plurality of fasteners attached to the top rim member. There is a tubular enclosure inside of the cage which is at least part transparent to varying degrees of opacity, sandwiched between the bottom rim member and the housing unit with countersunk gaskets to seal the tubular enclosure. The bottom rim member has mounted into it a loudspeaker driver and legs to elevate the loudspeaker system. When the unit is detached from the top rim member of the cage the transparent tubular enclosure is released. The housing unit contains a light emitting source, additional speakers and other associated electrical components. There are detachable audio and electrical connections between the housing unit and cage.

Abstract: In a speaker unit, a case 40 is formed of a synthetic resin member having a case body 42 and a protective cover 44 integrally molded. Further, an opening portion 48 is formed in a surrounding wall 46 of the case body 42 and a beam 50 is formed inside of the case body 42. In a state where the speaker 20 is inserted into the case body 42 through the opening portion 48, the speaker 20 is held by the beam 50 and the protective cover 44 from its upside and downside.

Abstract: In a speaker apparatus equipped with a speaker unit including a magnet, a frame and a diaphragm, a speaker housing has a substantially cylindrical shape, and also has such a structure that the speaker unit is secured onto one end surface of the cylindrical shape of the speaker housing so as to substantially cover the speaker unit except for front and back surfaces of the diaphragm. Further, the speaker housing has an opening in another end surface of the cylindrical shape thereof. A support bar extends and has one end secured to a back surface of the magnet of the speaker unit. Furthermore, a weight is secured to another end of the support bar, and then, the weight holds the support bar in a substantially vertical direction and grounds the magnet acoustically and virtually, thereby attenuating and suppressing oscillation transmitted from the magnet to the support bar.

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: A compact loudspeaker having a vertically oriented cylindrical housing supporting a relatively high frequency sound driver and a relatively low frequency sound driver. The high frequency driver closes the top of the housing, and is oriented to project sound upwardly. The low frequency driver is contained within the housing such that it divides the housing into upper and lower sound propagating chambers. The low frequency drive projects sound downwardly into the lower chamber. The lower chamber is closed at the bottom of the housing by a bottom plate. The lower chamber has a port communicating to the exterior of the housing. A crossover network is mounted to the bottom plate. Input terminals are located in the lateral surface of the housing. The interior of the housing is lined with acoustic padding for sound damping. The exterior of the housing is covered with a grille cloth, which in turn is covered with screen material. Decorative trim rings cover the upper and lower edges of the grille cloth and screening.

Abstract: A mechanical mounting system and extensional damping technique for loudspeaker crossover networks. This system decouples the crossover network from the loudspeaker enclosure (cabinet), isolating it from any vibrational energy in the cabinet walls. In addition, an extensional damping material is applied to the crossover network to damp any vibrational energy which may be coupled from the surrounding air into the network. The mounting system can be used for mounting any sensitive electronic components within an enclosure to provide isolation from the walls of the enclosure and from surrounding or environmentally induced vibrational energy.

Abstract: The latest advances in speaker driver design have resulted in high output drivers with superior low frequency response, power handling, and linear excursion than conventional drivers. These new drivers present further problems to enclosure design due to large port surface area and long port length requirements. The present invention wraps a port completely around an enclosure, maximizing port surface area and placing the consequently lengthy port in a more practical position. The port of the present invention converts a circular cross-section to an annular cross-section with constant cross-sectional surface area, thus integrating a large port into an enclosure without a large dimensional increase. In one embodiment, a bandpass configuration demonstrated a reduction in port air displacement and noise. Response deviations in the present invention due to flaws in construction and open pipe resonance can be alleviated through the use of plastics and filters, respectively.

Abstract: A panel mount speaker system including a housing having flange and wall portions, a locating portion defining a primary support surface as a concave annular spherical segment; a secondary support member defining a secondary support surface as a concave spherical segment opposite a main pivot point; a main speaker mount having an outwardly facing primary engagement surface slidably engaging the primary support surface; a main speaker unit coaxially mounted to the main speaker mount; a secondary mount member fastened to the stator element of the main speaker unit and having an outwardly facing secondary engagement surface slidably engaging the secondary support surface; an auxiliary speaker; a grill structure pivotally supporting the auxiliary speaker forwardly of the main speaker unit; a crossover network connected to the main speaker unit and the auxiliary speaker; a circuit panel mounting elements of the crossover network oriented and supported perpendicular to the housing axis, the panel flexing in response

Abstract: A speaker base, which includes a tweeter holder having a holder base and a bottom mounting holder rod, and withholding ring mounted on the tweeter holder to hold a tweeter, wherein the tweeter holder has an axial center through hole through its holder base and bottom mounting holder rod through which the lead wires of the tweeter pass.

Abstract: A compact speaker system is capable of reproducing a heavy bass sound with a superior transition characteristic. A sound radiated from a speaker unit passes through a three-dimensional spiral sound passage formed by a coaxial dual-tube structure provided in front of the speaker unit. In the coaxial dual-tube structure, a spiral partition plate is provided to bridge a gap between an outer tube and an inner tube so as to form the spiral sound passage.

Abstract: A loudspeaker assembly with a transducer capable of being swiveled to direct the sound to a convenient point thereby allowing the listener to select the optimal direction of sound. The assembly comprises a unique design which prevents the transducer from dropping below the plane of the speaker's baffle, thereby eliminating diffraction of sound waves which arise when sound radiates off the sharp edge of the cavity wall upon rotation of the transducer. The assembly allows a listener to adjust a transducer, such as the high-range frequency tweeter component of an in-wall speaker to his liking, without the need to remove and/or re-install the speaker in the wall. The assembly is equally adaptable to the interior of a vehicle or for use as a free-standing floor speaker. The assembly provides a unique speaker with a pivoting transducer which provides quality, multi-directional sound, free from any distortion created by the diffraction of sound waves.

Abstract: A directional speaker system includes an enclosure having an inner surface, an outer surface, an open end, and a closed end, a speaker driver directed toward the open end and mounted near the closed end of the enclosure, an in-line phase plug mounted in front of the speaker driver for manipulating the wavefront of sound waves produced by the speaker driver, and a preferably frustoconical shaped wave guide provided between the speaker driver and the open end of the speaker enclosure. The in-line phase plug preferably has a plurality of channels. The open end of the enclosure is preferably provided with an acoustically absorbent material around its inner perimeter. A second acoustically absorbent material is provided between the speaker driver, the in-line phase plug, and the wave guide, and the speaker enclosure. The in-line phase plug, wave guide phase plug and baffle plate operate to flatten the wavefront.

Abstract: An omni-directional speaker system having a speaker unit fixed in a speaker cabinet, a first reflecting plate having a hole installed in the speaker cabinet for dispersing sound waves emitted from the speaker unit, and a second reflecting plate disposed over the hole of the first reflecting plate.

Abstract: A loudspeaker including a generally spherical cabinet and at least one speaker driver contained in the cabinet and dividing the cabinet into a major sound chamber and a minor sound chamber. The cabinet has at least two sound propagation ports communicating with the major sound chamber and at least two sound propagation ports communicating with the minor sound chamber. The spherical cabinet of the loudspeaker provides an omni-directional radiation pattern. According to one possible embodiment, the at least one speaker driver comprises two speaker drivers facing each other and connected out of electronic phase so as to operate as a single push-pull unit. The loudspeaker, therefore, utilizes the rear sound waves created by its speaker drivers. One of the speaker drivers is substantially contained in the minor sound chamber and the other of the speaker drivers is substantially contained in the major sound chamber.

Abstract: An extensible speaker assembly for use in a motor vehicle including an enclosed hollow chamber for receiving sound waves from a speaker, the hollow chamber having a first hollow tubular cylinder rigidly connected thereto for receiving sound waves generated from a speaker, a second hollow tubular cylinder rigidly connected to the first hollow tubular cylinder for transmitting sound waves received from the first tubular cylinder to a third tubular cylinder, the first tubular cylinder and the second tubular cylinder having an opening at both ends, and a third hollow tubular cylinder slidably connected to the second hollow tubular cylinder, the hollow chamber having a speaker connected thereto for generating sound waves.

Abstract: In an omni-directional sound system such as a sound-light combination arrangement having at least one loudspeaker and optionally at least one light source, a bass loudspeaker arrangement includes a cylindrical casing having end walls at which are installed a bass loudspeaker and an insert casing respectively. The insert casing forms one or more bass reflection spaces within the casing. A sound deflection cone is arranged with its tip opposite the bass loudspeaker.

Abstract: Loudspeaker improvements are disclosed to add versatility and economy, particularly for multimedia applications. These improvements include: (1) the printing of voice coil conductors, (2) adding conductive elements to the sound driver surface, (3) using multiple coil paths around a single voice coil former to drive the overall sound driver surface, (4) creating a simple digital loudspeaker with multiple coil paths, (5) implementing multiple functions in the multiple coil loudspeaker/transducer, (6) creating integrated systems with a series of multiple function, multiple coil loudspeakers/transducers and (7) providing a novel subwoofer loudspeaker housed in a cylinder.

Abstract: A speaker enclosure including a pair of tubular cylinders, one of which is slidable inside the other, the first of the tubular cylinders having one end closed, one end open, and an opening in the wall thereof, the second of the tubular cylinders having one end open and a speaker located in the other end thereof. The speaker enclosure may also include a pair of tubular cylinders, one of which is slidable inside the other, the first of the tubular cylinders having one end closed, one end open, a speaker in the open end, and an opening in the wall thereof, the second of the tubular cylinders having both ends open.

Abstract: A speaker enclosure with at least one woofer and one mid-range speaker with associated parallel sound channels and ports for direction of the back waves generated by the speakers. The woofer and mid-range speaker are in a spaced relationship with the sound channel ports for the woofer speaker in close proximity to the mid-range speaker and the mid-range sound channel port in close proximity to the woofer speaker. The sound channels for the mid-range and woofer speakers are adjacent and parallel to each other. The back waves generated by the speakers travel along the sound channels which form a sound traveling path. The ports are located at a distance from the speakers generating the sound waves, but adjacent to other speakers, resulting in a life-like and rich sound.

Abstract: A speaker system includes a rigid elongate speaker enclosure having first and second ends, a speaker driver mounted at the first end and directed outward, and a sound dispersion assembly mounted over the speaker driver. The speaker enclosure has a wall between the first and second ends which is provided with a plurality of undulations. The undulations define outer peaks and inner valleys. The first end preferably includes a curved surface which curves back from the plane of the driver. The second end of the enclosure is preferably provided with a port, but may also be provided with another driver directed outward. The enclosure is preferably molded from fiberglass reinforced polyester. According to a preferred embodiment of the invention, the speaker enclosure is substantially frustoconical in shape. The port may be provided with a flexible tube or a flexible tubular segment may be provided on the enclosure at the second end, or at some location between the first and second ends.

Abstract: A sound radiated from the back of a speaker unit passes through a three-dimensional spiral sound passage formed by a coaxial dual-tube structure of an outer tube and an inner tube, and by a spiral partition plate provided to bridge a gap between the outer tube and the inner tube before exiting the speaker system. The cross-sectional area of the spiral sound passage may continuously expand or remain constant.

Abstract: A speaker system is disclosed which is capable of supplying reproduced sounds vibrating in substantially the same manner as in the respiratory sphere to human's sense of hearing by using conventional unidirectional speaker units in combination in a contrived arrangement, and by applying real time digital signal processing by means of a digital signal processor to the speaker units to cancel a peak and a dip in frequency response and in phase response through inverse correction which cannot be canceled only by improving the arrangement of the speaker units, thereby forming a sound emitter capable of providing ideal reproduced sounds. The speaker system comprises an enclosure EC having a basic structure of a hollow 32-hedron composed of 12 pentagonal flat surfaces 1 and 20 hexagonal flat surfaces 2, speaker units 7, 8 or 78 mounted in all or 25-31 of the 32 surfaces, and a real time digital signal processing system inserted in a input line of each of the speaker units 7, 8 or 78.

Abstract: Apparatus for mounting a speaker to a ceiling of a room that comprises an attaching ring adapted to be attached to a joist. A mounting ring is connected to the attaching ring. Apparatus to position the speaker at an angle relative to a front surface of the mounting ring and rotatably supports the speaker on the mounting ring so that a sound directional axis of the speaker may be rotated toward a chosen position in the room.

Abstract: A speaker system includes a vertically oriented elongated tube supported on a ground surface, and open at upper and lower ends thereof; a woofer, mid-range speaker and tweeter mounted at a lower end of the tube, the woofer having a front driving face with an effective driving area, the woofer providing an in-phase audio signal directed upwardly through the tube and an out-of-phase ground wave audio signal directed in an opposite direction therefrom; an enclosure enclosing the woofer and mounting the tube on the ground surface; a restricted open area formed between a lower edge of the enclosure and the ground surface and being less than the effective driving area, the restricted open area being arranged to transmit the out-of-phase ground wave audio signal from the woofer in a direction transverse to the axial direction; and a driving circuit for driving the woofer and including a power amplifier for amplifying an input signal with a variable gain and supplying the amplified input signal to the woofer, a circu

Abstract: Disclosed is a sub-woofer module which has a simple construction and provides a good low-frequency bass in compliance with an audience's taste. The sub-woofer module has an enclosure, a baffle board which separates the enclosure into first and second chambers, and a speaker coupled to the baffle board. The baffle board is engaged with a screw shaft and moves upward and backward along the screw shaft to vary the volume of the first and second chambers. A reverse-conical cap is disposed above the enclosure to permit the upwardly projected sound to be projected in 360 degrees, and a conical base is disposed below the enclosure to permit the downwardly projected sound to be projected in 360 degrees. The audience can listen to sound of the same quality regardless their position in relation to the sub-woofer module.

Abstract: A Helmholtz resonator loudspeaker having a capsule shape that may be truncated at one or both ends. When the housing is truncated, dampening material may be added at the truncated portion. Legs or a stand aid in the physical stability and to further assist the acoustics. The resonator tube is located on the interior of the housing chamber with one end opening into the interior concentric with an axis running along the length of the capsule and the other end exiting the housing below the speaker.

Abstract: A loudspeaker system includes a flexible compressible tube having a woofer mounted at one end with its cone directed outward, and a vented baffle mounted at the other end. A first sound dispersion element is mounted with its apex facing the cone of the woofer and a midrange speaker is mounted in the base of the dispersion element with its cone facing away from the tube. A second sound dispersion element is mounted with its apex facing the cone of the midrange speaker, and at least one tweeter is mounted on the base of the second sound dispersion element with its cone facing away from the tube. According to one embodiment, a plurality of tweeters are mounted in an enclosure mounted on the base of the second dispersion element. According to another embodiment, a single tweeter is mounted in the base of the second dispersion element and a third dispersion element is mounted with its apex facing the cone of the tweeter.

Abstract: A speaker enclosure including a pair of tubular cylinders, one of which is slidable inside the other, the first of the tubular cylinders having one end closed, one end open, and an opening in the wall thereof, the second of the tubular cylinders having one end open and a speaker located in the other end thereof. The speaker enclosure may also include a pair of tubular cylinders, one of which is slidable inside the other, the first of the tubular cylinders having one end closed, one end open, a speaker in the open end, and an opening in the wall thereof, the second of the tubular cylinders having both ends open.

Abstract: This application outlines several applications of a piezoelectric materials invention to produce quality loudspeakers in applications where coil driven dynamic speakers are difficult or impossible to implement with an appreciable degree of sound quality. This invention includes a series of modifications to a laptop computer such as the IBM 750c. The modifications to the computer consist of placing piezoelectric patches behind the LCD and directly to the back wall of the laptop lid. Damping materials and stiffeners are also added to the back wall to reduce structural resonance. A system consisting of an audio amplifier and transformer is used to drive the piezo speaker.

Abstract: An improved system for acoustic enclosures, which greatly enhances sound reproduction, with improved frequency response, reduction in harmonics-induced distortion, improved conversion of electrical to acoustical energy increased purity of sound due to better phase response among its other qualities. The acoustic principles utilized at those of the resonating air column, the horn-type form, and the multiport. A horn-shaped multiport comprised of a number of smaller ports is used to modify the resonating air column to produce the exponential multi-ported acoustic enclosure.

Abstract: A sound imaging system preferably including two enclosures each comprising a truncated conical base unit and a truncated conical upper unit supported above and spaced apart from of the base unit, and containing a bass driver and composite midrange and high frequency drivers. The bass driver is oriented horizontally at the top of the base unit, and the sound energy produced therefrom is reflected by a conically shaped acoustic lens or defector depending from within the interior of the upper unit directly above the bass driver, such that the sound energy is reflected downwardly along and between the spaced apart truncated conical walls of the upper unit and base unit and emanates radially therefrom in all directions. The composite midrange and high frequency drivers are supported at the top of the upper unit on a crown structure having a plurality of vertical legs defining a platform oriented approximately 20.degree. relative to horizontal.

Abstract: An acoustic sensor for measuring acoustic waves contained in fluid flow flowing over the sensor. The acoustic sensor reduces any unwanted self-noise associated with the flowing fluid by providing a nose cone having proper aerodynamic properties and by positioning the diaphragm of a microphone of the sensor at a location where any unwanted noise is at a relatively low level. The nose cone has a rounded, blunt or even sharp tip neither of which creates any major disturbances in the flowing fluid which it intercepts.

Abstract: An omnidirectional speaker system includes woofer and tweeter speakers mounted in a concave, curved upper housing fabricated of a relatively hard shell exterior and a foam interior, preferably plastic. Beneath the upper housing is a base, including a generally conical phase compensation plug which disperses the sound waves equally in all directions through a circumferential aperture between the upper housing and base. In a preferred embodiment, the cross-sectional shape of the upper housing is parabolic and the cross-sectional shape of the phase compensation plug is hyperbolic. A foam ring is attached to the exterior surface of the upper housing to prevent the formation of a sonic "hot spot" which can lead to a high intensity sonic beam objectionable to listeners.

Abstract: A decorative vase or urn having a high fidelity audio speaker mounted within on a composite ring attached to the inside of the vase by a flexible adhesive to permit dampening of vibrations produced between the speaker and the rigid side of the vase. A plurality of openings are formed in the vase to permit distribution of the audio sound, the total area of the openings having a relation to the surface area of the speaker cone of 36% or greater.

Abstract: An omni-directional stereo speaker especially useful in high fidelity sound reproduction applications, comprised of a polyhedron speaker enclosure, separate speakers or drivers mounted in some or all of the faces of the polyhedron enclosure, an acoustically transparent cover or outer housing for the enclosure, and a mounting means for positioning the speaker unit away from walls or other flat reflecting surfaces so as to provide an aural stereo effect throughout a room or other limited space. The polyhedron enclosure and multiplicity of speakers therein approaches ideal spheroidal projection of the reproduced sound wave, i.e. the sound appears to be emanating from a point source, and thereby produces a realistic stereo sound image in all parts of the room.

Abstract: For use in mounting a speaker on a wall member, such as a rear corner pillar, of a vehicle, such as a van, minivan, or station wagon, a molded speaker mounting bracket adapted to being speaker mounted on the pillar. The molded bracket includes speaker receiving segment and three legs extending from the receiving segment for being heat welded onto a surface of the corner pillar. The speaker receiving segment is contoured to include a first square portion, a second frustoconical portion, and a third internal flange portion, with an upwardly converging open front terminating in upper corners positioned a predetermined distance apart, adapted to having a speaker snapped past the upper corners by spreading same and thereafter being securely retained by the first, second and third contoured portions.

Abstract: A loudspeaker unit is provided for attachment at an elevated position within a listening space. It has a drive unit for producing a beam of treble sound, and a sound mirror that distributes a beam from the sound unit over a wide angular extent both horizontally and vertically with a generally consistent amplitude of perceptible sound. The unit may further comprise an angled mid range and low frequency drive unit. The unit demountably clips into a support bracket that can be carried by a post or fixed directly to the wall. Signal supply is via connectors in the bracket so that as the unit is clipped in place, the electrical connections are established. The speaker is quadrant shaped when viewed in plan and lends itself to installation in groups and clusters (FIG. 13).

Abstract: A woofer module is provided for use in a television set, which comprises a hollow enclosure and a woofer accommodated within the enclosure for reproducing a sound of low audible frequency band. The enclosure has a first sound wave passageway extending from a front side of the woofer toward a first open end and a second sound wave passageway extending from rear side of the woofer toward a second open end. The second passageway is divided into an upstream region, a middle expansion region and a downstream region. The upstream region is contiguous to the rear side of the woofer and has a cross-sectional area smaller than that of the expansion region so that an equivalent air mass can be applied to the woofer.

Abstract: A loudspeaker system is arranged to house an electromagnetic loudspeaker driver of the type having both front and back acoustic waves. The loudspeaker driver is reversed mounted such that its weaker back waves are emitted directly to the outside, while its stronger front waves are directed through an internal passageway of the loudspeaker enclosure before adding in phase and exiting with the back waves. The front waves are phase-shifted by half a wavelength through the internal passageway which acts as a transmission line. The attenuation suffered through the transmission line is offset somewhat by the stronger front waves such that the differential amplitudes of the front and back exiting waves are minimized. Throughout the transmission line, the flow of the sound waves is kept circular and laminar in order to maintain coherence and to further minimize loss of energy due to turbulence. These are accomplished by the use of a cylindrical passageway, a streamlining reflecting cone, and an outer reflecting ring.

Abstract: A ceiling-mounted loudspeaker includes upper and lower sound-directing structures having walls acting as a radial horn to provide a wide included angle of coverage for sound energy generated by a loudspeaker driver assembly having a piston for directing generated sound energy upwardly into the horn. The lower structure further has a continuously convex bottom configured and dimensioned to define a diffraction path for at least some of the sound energy exiting the output mouth of the radial horn, so that the convex bottom acts as a downwardly-directed diffractor. The radial horn and convex bottom together produce an oblate spheroid of sound energy affording a substantially uniform amplitude of sound within a large finite horizontal plane at the level of a listener.