Reflex baffle

A loudspeaker assembly comprising a loudspeaker including a front mounting flange having front surfaces, and an enclosure for the loudspeaker including a front wall and a rear wall and a top wall and a bottom wall and opposed side walls all having at least two layers of corrugated material, the inner...     

The sound speaker system comprises an elongated vertical cylinder having an overall length equal to an integral multiple of its inside diameter. The cylinder is open at its upper and lower ends and a loudspeaker is positioned adjacent its lower end. The diameter of the loudspeaker cone is equal to one-half...     

In a bass-reflex sound reproducing system, a ducted port is utilized to reduce distortion in the lower portion of the frequency range. To increase relative sound pressure level in that lower portion, the enclosure is constructed to exhibit a predetermined acoustic compliance and is essentially air-tight...     

An improved speaker enclosure for providing an acoustical balanced output with improved audio quality at low level reproduction. The enclosure includes a low sonic frequency pressure induced sonic wave amplification resulting from in phase reflection mechanically of re-induced resonant pressure waves....     

A speaker enclosure for a stereophonic sound system is disclosed. The speaker is mounted in a chamber, the enclosure of which is connected to a tube of relatively long length and of circular cross-section. The construction is such that phase-inversion occurs so that the sound emanating from the rear...     

A resonant loudspeaker system which produces improved reproduction of low frequency sound comprises a coupling chamber which encloses the rear of the low frequency driver and which contains two additional openings in which are suspended diaphrams free to move but coupled together so that the forces on...     

A reflex type speaker enclosure integrally formed of ceramic material having a shell of hemispheroidal configuration and having an inturned speaker mounting flange adjacent the equatorial plane. The enclosure is adapted to be suspended by structure extending through an aperture in its apex. The flange...     

The invention relates to a loud speaker system, and more particularly, the utilization of space to the utmost of efficiency for the reproduction of sound. The single unit of a loud speaker apparatus is most effectively mounted at the 90.degree. intersection of adjacent walls and ceiling, cater-corner...     

In a bass-reflex type speaker system, in which sound signal waves radiating from the back of a speaker within a cabinet are emitted out through a hollow duct while the phase of the sound signal wave is reversed, the improvement comprising at least one dividing plate secured within the hollow duct and...     

A compact loudspeaker system adapted for the reproduction of sound at minimum distortion. Two small diameter direct radiator loudspeakers and a matching crossover network are mounted in a common enclosure having a short non-folded transmission line completely filled with randomly oriented non-woven fibers,...     

A speaker system comprised of an enclosure with a partition inside. The partition, set apart from a wall of the enclosure, has an aperture in it. A loudspeaker, mounted at the wall, has a speaker cone projecting into the aperture in the partition.

A speaker system comprising a speaker unit, a drone cone driven by the speaker unit; and a removable weight loaded on the front of the drone cone which can be exchanged from the front of the drone cone.

A loudspeaker system has a cabinet in which a loudspeaker is mounted, the cabinet supporting therein a hollow duct which provides sound communication between the exterior and interior of the cabinet. A standing wave prevention member made of a sound absorbent material is disposed within the duct in spaced...     

A loudspeaker device comprises a bass reflexing duct formed on an enclosure on which the loudspeaker unit is provided, a passive radiator provided on the enclosure; an acoustic impedance body provided between at least one of the duct and passive radiator and the loudspeaker unit, so that the resonance...     

A cabinet for improving the sound output of an amplifier, the cabinet being in the form of an upright rectangular housing with a horizontal partition dividing the interior into an upper and lower portion, the partition having a speaker opening and a baffle opening, a speaker being mounted in the speaker...     

A speaker structure comprising a tetrahedronal shell having an upper end and an equilateral triangular base with equisized triangular walls and with the margins of the adjacent walls and base being secured together and wherein one of the walls includes a pattern of port openings and these openings are...     

A speaker system comprising a speaker cabinet having a forward baffle plate, two side plates and a rear plate, a passive diaphragm, a speaker mounted in the baffle plate of the speaker cabinet, an opening disposed in the baffle plate next to the speaker as an outlet for the sound radiated from the passive...     

A phase plug structure is described which is an intermediate element between a conventional fiber cone loudspeaker and an exponential horn. The purpose of the phase plug is to equalize acoustical path lengths and thereby minimize high-frequency cancellations caused by phase differences. The design of...     

A cone speaker is mounted to a horn within a reflex chamber behind a forward opening through the chamber, and the forward end of a horn is attached to the opening. The speaker is connected in the entrance discharging rearwardly into the chamber, and forwardly into the horn. The horn includes a restriction...     

Loudspeaker equipment embodying a speaker, an enclosure for the speaker which is substantially closed except for the speaker opening and which is formed of walls which are thin and therefore capable of excitation and consequent sound generating vibrations under the influence of the speaker, the speaker...     

A loudspeaker system is disclosed having a rigid framework which contains a high compliance loudspeaker connected to an adjustable air column tube. The adjustable air column tube provides exact 1/4 wavelength tuning for the speaker system, to further improve its low frequency response, in accordance...     

A loudspeaker enclosure is disclosed which includes a horizontal bottom wall, parallel spaced vertical front and rear walls connected with the bottom wall, the front wall containing an opening for receiving a loudspeaker, and a horizontal top wall connected with the upper edges of the front and rear...     

A speaker cabinet comprises an enclosure having a top, bottom, front, back and two side panels, each panel being contiguous with an adjacent panel along its four edges, and the front panel having a sound port and interiorally of which is mounted a speaker, an improvement comprising a sound post extending...     

In a loudspeaker system having eight drivers on a baffle, the baffle has two port openings centered in respective squares embracing respective groups of four drivers. A tubular column extender snaps into each port opening and has a snap cap for detachably securing a polyester disk over the opening. A...     

A vent for linear control of pressure in an infinite baffle type loudspeaker system wherein an elongated "V" shaped trough is cut through the back wall of a speaker enclosure with the smaller side of the trough piercing the inner surface of the back wall of the enclosure and the larger side thereof piercing...     

In an enclosed loudspeaker apparatus comprising a transducer, such as a loudspeaker, for producing acoustic radiation or sound when an electric current is applied to a drive means of the transducer, and an enclosure having an aperture in which the transducer is mounted for emission of the acoustic radiation...     

A speaker system comprises an enclosure and at least one speaker mounted therein. The enclosure includes at least one duct connecting the interior of the enclosure directly with the outer air at the front thereof. Each duct is confined at least at one side by a member extending substantially normal to...     

A bass sound projection system comprises a cabinet containing at least one bass loudspeaker operating into a sound channel. The sound channel converges forwardly, relative to the direction of propagation of sound waves, of the loudspeaker to a throat and then diverges forwardly, relative to the direction...     

An acoustic loudspeaker is mounted within a curved reflecting enclosure. Openings through the enclosure allow sound vibrations from the front of the speaker to emerge from the enclosure. A port in the enclosure, spaced away from the openings allow vibrations from the rear of the speaker to emerge from...     

Loudspeaker equipment embodying a speaker, an enclosure for the speaker which is substantially closed except for the speaker opening and which is formed of walls which are thin and therefore capable of excitation and consequent sound generating vibrations under the influence of the speaker, the speaker...     

An acoustic speaker system suitable for use with a home stereo system has a bass speaker, a super-tweeter speaker, a tweeter speaker and a midrange speaker. The speakers are disposed in a generally ascending arrangement with the bass speaker occupying the bottom position, the super-tweeter speaker mounted...     

A cabinet for improving the sound output of an amplifier including an upright housing with a speaker mounted on the front, the front having one or more baffle openings, a device herein called a sound lens inserted in the baffle opening, the vibration of the speaker serving to induce vibration of the...     

A loudspeaker enclosure for housing a basic speaker and providing a conduit for channeling the sound waves emitted from the back surface of the basic speaker so that the sound waves are shifted in phase and emerge from a port in the enclosure and add to, rather than acoustically cancel, the sound waves...     

A loudspeaker unit having an improved quality of bass reproduction for use in a stereo system with a second unit, which is a mirror image of it, to provide a better three-dimensional feeling on hearing the reproduced sound and to provide an increase in the area of the sound producer or source which includes...     

A loudspeaker apparatus comprises an enclosure having a loudspeaker mounted on a surface thereof, means within the enclosure and cooperating with other surfaces thereof for initially directing sound energy emanating from the back of the loudspeaker through a first sound wave compression zone in a first...     

A high-fidelity speaker arrangement suitable for mounting in the wall structure of a wall is disclosed. A bass reflex speaker enclosure containing a plurality of speakers and an associated cross-over network comprises the speaker assembly to be mounted in the wall structure. A mounting assembly adapted...     

A unidirectional speaker enclosure has a cylindrical cabinet supporting a speaker at its front end and having a closed bottom at its rear end. The front end constitutes a main aperture surrounded concentrically by a secondary aperture communicating with the rear face of the speaker membrane through two...     

A speaker enclosure comprising a cabinet that defines an upper compartment and a lower compartment. A sectorial horn is mounted in the upper compartment and a prismatic member is disposed across the outlet of the horn to direct the sound energy upwardly and downwardly from the horn. Mounted in the lower...     

A loudspeaker holder including a baffle plate and a loudspeaker supported by the baffle plate is rotatably coupled to a portable sound reproducing device having an operating surface and an audio-amplifier for supplying a power output signal to the loudspeaker through a pin and opening coupling means....     

A loudspeaker comprises a horn having an open throat from which a pair of outwardly curved side walls extend. A cone driven speaker is mounted in the horn throat, and the horn with attached speaker is mounted in a base reflex enclosure which forms a chamber therebetween. A compression driven tweeter...     

A speaker system includes a housing with four side panels and a back panel. A speaker mounting panel with a plurality of openings therethrough is positioned opposite the back panel to enclose the housing and define an acoustic chamber therein. A packed fibrous sheet material is attached to cover the...     

A self-contained loud speaker for installation below the floor level is placed in an enclosure which is fitted in a hole in the floor. The bottom of the enclosure contains a jute mat and the speaker assembly is placed in the enclosure resting on the jute mat. The speaker assembly has a sound deflecting...     

A loudspeaker cabinet comprising front, back, top, bottom and side panels, a speaker drive unit positioned on an upper portion of the front panel, first and second spaced apart sound wave reflector panels positioned below the speaker unit and extending from the front panel towards the rear panel but...     

A free standing frame supports front, back, side, top and bottom panels in such a manner that the panels are free to move relative to each other. Speaker drivers are mounted to the front panel such that frontwave radiation therefrom is allowed to project outwardly. Rear wave radiation is, however, contained...     

A bass-reflex type speaker system having a cabinet including a front baffle board, a back panel and two side panels and a speaker mounted on the front panel. A port is disposed in either the back panel or in one of the side panels and a duct is in communication with the port. The back panel may be flat...     

An enclosure for transducers incorporates an interior acoustically reflective shell. This acoustically reflective shell is shaped so that the inner surface thereof is the envelope of at least a section of a cylinder of elliptical cross section, an ellipsoid of revolution, or the envelope of a multitude...     

A speaker enclosure having a rear bass-reflex chamber and a forward mid-range chamber formed within a substantially rectangular housing. A tunnel-bass port is formed in the bottom section of the front wall of the enclosure, the bottom section being angularly disposed and arranged to communicate with...     

In a bass-reflex enclosure or cabinet of the kind in which a loudspeaker unit is mounted in an opening (11) of a front plate (10) and at the end of two coaxially mounted and into the interior of the cabinet extending tubular members (13, 14), so that an annular slot (28) around the speaker unit (16)...     

A loudspeaker enclosure with precisely dimensioned chambers to control and develop loudspeaker back wave energies almost exclusively as acoustical tensions. Focusing of these acoustical tensions is accomplished within each chamber so as to localize the several points of acoustical energy concentration...     

Headrest speaker device, in which the upper ends of pipes supporting a headrest on the upper part of a seat are in communication with speaker cabinets disposed at each side of the headrest and the lower ends of the pipes open toward the outside at the sides of the seat.

A high fidelity loudspeaker system having at least one additional smaller speaker mounted above the largest speaker. The loudspeaker is of the type having a permanent magnet and a moving coil, and the smaller speaker or speakers are mounted on a support member which passes through the moving coil of...     

A ported speaker enclosure is disclosed for extending the low-frequency range of the enclosure and increasing the intensity of the low-frequency range of reproduced sound wherein the size of the enclosure, the locations of the speakers, and the size and locations of the ducted ports are determined by...     

A loudspeaker system has an elliptical stepped mid-range horn above and coplanar with a flared mid-bass horn having disposed therein a pair of tweeters on sidewalls thereof and a woofer in a backwall thereof. The back of the woofer communicates with a folded low frequency bass horn such that low frequency...     

A loudspeaker system has an enclosure of rectangular cross section with a baffle dividing the interior into first and second subchambers. Each subchamber has a port tube coupling the subchamber to the region outside the enclosure. The dividing baffle carries a woofer.

A speaker unit utilizing the sound radiation from the front and rear faces of a diaphragm can be constructed by placing the diaphragm in an acoustic baffle to isolate the back side and front side radiation and propogating the backside radiation through a tube to an acoustic resonator. This arrangement...     

An acoustic device including a frame bordering an area open to the front and rear of the frame, a speaker corresponding in size to the area bordered by the frame located with the area bordered by the frame, a cover positioned over only the front of the acoustic device functioning as a direct wave attenuator...     

A limited space, small enclosure bass speaker module is shown, for providing an enhanced perception and sound level of bass frequencies. An acoustic transducer is mounted on an end of a closed elongated, cylindrical member of rigid construction. The cylinder provides acoustic loading of the transducer,...     

A high mass speaker enclosure having a speaker mounted to a front escutcheon plate and below which a multi-gated balanced acoustical transmission yoke is mounted and whereby a portion of the enclosure's interior air pressure is relieved so as to augment the speaker sound, especially at frequencies below...     

A loudspeaker installation for the rear shelf of a motor vehicle. A lightweight, ribbed loudspeaker enclosure is fastened to the underside of the rear shelf so as to be suspended into the trunk of the vehicle and disposed about a conventional loudspeaker flush-mounted to the rear shelf. The enclosure...     

A portable speaker for vehicles which includes a shaped, box-like structure having front and rear sound chambers having top segments disposed in different planes and port holes communicating with the sound chambers, respectively, with front and rear speaker units provided in the respective sound chambers....     

A speaker system includes an enclosure having a port from which a duct extends into the interior of the enclosure. A board having a smaller area than the cross-sectional area of at least the exit of the duct is mounted to block the port except a slight slit defined by the entire circumferential edge...     

An enclosure for a transduction element incorporates a geometrically shaped acoustically reflective shell. This acoustically reflective shell is shaped so that the inner surface thereof is at a least a section of that shape generated when an ellipse is rotated around a line which, lies in the plane of...     

A speaker cabinet of the type used in stereo systems. A horizontal wall partitions the interior of the cabinet into an upper portion within which is positioned a full range speaker member, and a lower portion within which is positioned a low range speaker member. A pair of laterally spaced ports are...     

A cabinet for a loudspeaker is disclosed, which has a duct communicating the inside and outside of the cabinet. The duct includes a first duct section open to the inside of the cabinet and having a substantially constant sectional area and a second duct section extending from the first duct section toward...     

A speaker system comprises a plurality of serially connected, angularly disposed hollow tubes having a total mean axial length of one-quarter wavelength of the desired lowest frequency response of the speaker system, the speaker system providing, with a single small speaker, the entire frequency range...     

A singular configuration for a high fidelity sound speaker enclosure is disclosed. This acoustical structure is formed in two joined sections: the upper section which generally forms a four sided truncated pyramid and the lower section which generally forms an inverted four sided truncated pyramid. The...     

A vented louspeaker has a speaker and a vent tube within the loudspeaker enclosure, the vent tube being arranged obliquely to the wall on which it is mounted and being longer than the distance between that wall and the opposite wall.

A vehicular speaker system in which a resonance of the vehicle's interior is compensated by a resonance of a chamber enclosing the rear of the speaker unit. The chamber includes rearwardly facing ports.

A planar loudspeaker system having an elongated and substantially planar enclosure, configured to house tweeter, midrange, and a pair of upper and lower woofer diaphragms in its median, longitudinal section. A pair of woofer labyrinths, acting as quarter-wave transmission lines, extends throughout the...     

A speaker enclosure characterized by a curved back wall and top and bottom planar surface members which together define a front opening. A speaker member, a horn member and a tweeter member are adapted to be mounted within the front opening. At least the curved back wall is made from wood of a specified...     

The invention concerns a loudspeaker housing (1), particularly for rendition of the deep and middle tone ranges, having a loudspeaker (27) and a folded flare (14; 20, 21, 15, 16; 6). The front side of this loudspeaker housing (1) has an upper area, in which the loudspeaker (27) is located, as well as...     

A sound radiating loudspeaker and tubular enclosure combination wherein the tubular enclosure is either formed in a helical configuration or two or more straight tubular sections which interest each other at an angle. In either form the tube is capable of free standing on a supporting surface with a...     

An enclosure for a transduction element incorporates a geometrically shaped acoustically reflective shell. This acoustically reflective shell is shaped so that the inner surface thereof is at a least a section of that shape generated when a parabolic structure is rotated around a line which, lies in...     

One or more up-firing woofer loudspeakers (12 or 22) are mounted atop a truncated pyramidal enclosure (1 or 21). A down-firing tweeter (5 or 25) is aligned above the woofer. A sound-reflecting sphere (4 or 24) is disposed between the woofer and the tweeter. When the sphere is aligned there-between omni-directional...     

A speaker system especially designed to improve the characteristics of low sound bands. The speaker system desirably includes a partition dividing the interior of a cabinet into a speaker chamber and a resonance chamber, and two radiation ports. One radiation port is formed on the partition and the other...     

A loudspeaker having means for acoustically impeding excursion of the transducer diaphragm and means for acoustically attenuating the output of acoustic vibrations of frequencies above a preselected frequency. The loudspeaker includes first and second subchambers separated by a dividing wall in which...     

A speaker enclosure assembly is disclosed, which comprises an enclosure provided with a baffle plate, to which a speaker unit is attached, characterized in that the enclosure is provided with a bellows-like sound pressure buffer member.

A loudspeaker with a pair of speaker units and a manifold chamber between the speaker units for combining the sound from both speaker units. The manifold chamber is formed by walls having an exit opening and a pair of rectangular apertures, the apertures confronting each other on opposite sides of the...     

An enclosure for a bass loudspeaker for housing in a larger multiple loudspeaker enclosure having a pair of concentric cylindrical shells filled with dense particulate matter.

A speaker system mounted on a rear portion of a vehicle compartment. The speaker system has an elongated cabinet extending in horizontal direction, and an elongated buffle plate coupled to a front open end of the cabinet for providing a cabinet chamber. Within the chamber, a woofer speaker is provided....     

A mobile speaker system for mounting on a rear parcel tray attachment portion of a vehicle, the speaker system includes: a bottom casing elongated along a vehicle's width; an upper casing mounted over the elongated bottom casing so as to form a speaker cabinet, the bottom casing having a plurality of...     

A loudspeaker system which comprises a loudspeaker unit for radiating a first sound, a horn unit having a throat coupled to the back of the loudspeaker for radiating a second sound, and an acoustic filter provided in the horn for causing an acoustic impedance of the horn unit to be discontinuous. When...     

A waterproof ground audio speaker apparatus has a speaker housing having a cylindrical sidewall, one open end and a closed end. A hollow cylindrical inner housing has a pair of open ends and is attached to the speaker housing with its walls in a spaced relationship to the walls of the speaker housing...     

Disclosed is a compact, wide-range acoustic apparatus which can perform lower bass sound reproduction and is free from noise or distortion components. Spatially separated first and second chambers are formed. The first and second chambers communicate with each other through a port, so that the first...     

An acoustic apparatus has a Helmholtz resonator having an open duct port and cavity and a vibrator disposed in the Helmholtz resonator. An opening portion of the open duct port is extended in a horn-like shape, so that the open duct port communicates with a port mounting surface with a smooth curvature....     

In an acoustic apparatus in which a vibrator which drives a Helmholtz resonator having an open port by one surface thereof and directly radiates an acoustic wave from the other surface thereof is arranged in the Helmholtz resonator, the open port is arranged coaxially with the vibrator, and the vibrator...     

An acoustic apparatus for improved bass sound reproduction comprising a resonator, a vibrator, and a vibrator drive means, the resnoator having a passive diaphragm serving as a resonance radiation unit for radiating an acoustic wave by resonance, the vibrator having an active diaphragm provided for the...     

An acoustic apparatus for improved bass sound reproduction comprises a resonator, a vibrator, and a vibrator drive means. The resonator has a resonance radiation unit for radiating an acoustic wave by resonance, the vibrator has a diaphragm disposed in the resonator, the vibrator drive means has a motional...     

A loudspeaker enclosure accommodates at least one speaker in the front wall of the enclosure. The interior of the enclosure is divided into two smaller chambers by means of a partition inclined with respect to the front and rear walls. One such chamber is adjacent to the speaker, while the second or...     

In an acoustic apparatus in which a vibrator is arranged in a Helmholtz's resonator having an open duct port, and the vibrator is driven to radiate a resonant acoustic wave, a duct resonance absorbing means is provided to the open duct port constituting the Helmholtz's resonator so as to remove an unnecessary...     

An enclosure (10) for mounting two transducers (12, 14) includes a wall (20, 22) defining an enclosure (10) interior. The enclosure (10) also includes a wall (54 and/or 56) for dividing the enclosure (10) interior into a first portion (16) and a second portion (18). The enclosure (10) wall (20 and/or...     

A loudspeaker system has an enclosure with a baffle dividing the interior into first and second subchambers. The smaller subchamber is directly coupled to the region outside the enclosure by a port tube. The larger subchamber is coupled to the region outside the enclosure via the smaller subchamber by...     

This invention relates to a loudspeaker having a plurality of sound collecting tubes attached to the rear of the speaker frame or the sound collecting tubes forming the speaker frame for collecting and directing sound waves emitted toward the rear of the speaker diaphragm. The sound collecting tubes...     

Stereo electroacoustical transducing apparatus for providing acoustical reproduction in a room at least partially bounded by a room bounding surface including a floor, sidewalls, and a ceiling, the apparatus including a nonlocalizable woofer module that is mounted outside of the room and communicates...     

A speaker system installable in a narrow space and capable of efficiently reproducing sounds of frequencies of up to about 45 Hz. The system comprises a speaker, and a speaker cabinet having a first chamber enclosing the rear side of the speaker and a second chamber enclosing the front side of the speaker....     

A loudspeaker of the present invention includes a loudspeaker cabinet and at least one loudspeaker element having a loudspeaker membrane. A plurality of sound passages define a cavity in a wall of the cabinet, and each sound passage terminates on one end in a proximal aperture acoustically coupled to...     

A subcompact woofer speaker cabinet system provides high volume low frequency response, long speaker life without overload and sound projection over considerable distances. This is achieved by mounting a damped speaker diaphragm within a cabinet enclosure having a single projection opening for soundwaves...     

A speaker housing arrangement which uniquely combines a number of acoustic functions is disclosed in both a simple embodiment and in a more complex embodiment. Each embodiment utilizes a pair of angular deflectors in a tubular or pipe type enclosure to directionally co-align the sound product from both...     

A loudspeaker enclosure accommodates at least one speaker in the front wall of the enclosure. The interior of the enclosure is divided into at least two smaller chambers by means of a partition inclined with respect to the front and rear walls. One such chamber is adjacent to the speaker, while a second...     

The present invention relates to a so-called bass-reflex electroacoustic transducing apparatus, wherein a plurality of sound ducts (ports) having the same equivalent mass and different lengths are provided in communication with a housing which incorporates therein an electroacoustic transducing element....