Abstract: The invention relates to an arrangement for improving leak tolerance in an earpiece (100) of a radio device. The invention can be applied preferably in mobile stations. One idea of the invention is that an acoustic volume (111) is arranged behind the earpiece by taking advantage of the RF shield casing (112, 116) of a radio frequency unit of the device. By means of the invention one can form behind the earpiece an acoustic volume which loads optimally the earpiece without therefore needing to enlarge the size of the device. In an embodiment of the invention one wall of the casing arranged behind the earpiece has been formed by means of an electronic circuit board (112), to which circuit board radio frequency components (117) of an electronic unit have been connected. Then between the casing and the external volume one can preferably form an acoustic path by means of through holes (113, 114) arranged in the circuit board.

Abstract: A novel speaker box system for a deep bass amplification consists of a front trumpet horned speaker cover box and a rear speaker box. The rear speaker box consists of a cylindrical box and a speaker installed at one end of the cylinder. The other side of the speaker box has a hole for electrical wires to the speaker. The front trumpet horned speaker cover box consists of a cylindrical box and a trumpet. The trumpet is attached to one end of the cylindrical box. The center of the trumpet has an air port connecting the inner side of the trumpet box and the open air. The trumpet horned speaker cover box and the speaker box of this invention are assembled in one set by, including but not limited to, a male thread screw carved on the outside of the speaker box and a female thread screw inside of the trumpet box. Those boxes are assembled in one set for a hip-hop or a rap, which needs a deep bass sound.

Abstract: The present invention provides a system and method for accessing, transmitting and storing a client's hearing profile on a network, which results in the creation of an audio font that is customized to the client's hearing preferences. In turn, the client's audio font may be accessed by the client and transmitted to a client's selected digital audio device via a network connection, which attenuates the sound drivers of the digital audio device to properly filter and adjust audio output in a manner that best enhances the sound quality to the client's needs and preferences. The invention allows the client to customize the sounds emitted from digital audio devices by providing audio preference feedback which modifies the selected audio font to more accurately represent the audio preferences of the client.

Abstract: A sound system employing wide band loudspeakers, which includes one or more loudspeakers constructed to be placed and housed one inside the other in a closed configuration for transporting and storing and to be detached one from the other and positioned in different combinations in a combined functional configuration.

Abstract: A reduced-size speaker for generating sound waves in wide low frequency audio region includes a cylindrical main body which is open at the top and bottom surfaces, a top lid being provided on the top surface of the main body and a circular ring-shaped base, which has a hole in its center, being provided on the bottom surface of the main body. A circular sound pipe is provided approximately in the center of the top lid and extends from the upper surface of the main body through the inside of the main body. A disc-like film is provided over the opening of the hole of the base, which is located at the outer side with respect to the main body, the disc-like film being held between the base and a circular ring-shaped bottom lid. A disc-like sound generator is provided in the opening of the hole of the base, which is located at the inner side with respect to the main body, with a circular ring-shaped damper provided in between.

Abstract: An economical and compact dual-chamber loudspeaker includes a small driver received within a partition extending between, and in acoustical and pneumatic communication with, both a front and a back chamber, each of which has a relatively small volume. An elongated vent is in acoustical and pneumatic communication between the front and back chamber at a substantially planar opening in the partition. The drone cone is in acoustical and pneumatic communication between the front chamber and the outside environment at a substantially planar opening in the housing. The two openings are spaced apart and generally parallel to each other. In a preferred embodiment, the volume of the chambers is minimized by securing an elongated concentric vent around the vent extending between the front and back chambers.

Abstract: A loudspeaker includes a cylindrical sound case provided with a plurality of radial ribs thereby dividing interior of the cylindrical sound case into a plurality of chambers and a common circular space at a central portion and therefore forming a plurality of resonance chambers, a sound coil assembly including cylindrical member which is open at one side and formed with a curved surface at another, the curved surface having a center through hole, the cylindrical member being dimensioned so that the cylindrical member will be tightly engaged with the ribs when fitted into the sound case thus forming a plurality of resonance chambers, a collar having a tubular reel at one end and a curved diaphragm at another end being arranged inside the cylindrical member, and a magnet assembly including a circular iron member having a central recess in which is fitted a magnet and a magnetism permeable disc.

Abstract: A radiotelephone is provided which comprises a housing 1 having an earpiece port 4, a loudspeaker 6 and a resonator. The resonator comprises and earpiece path form the loudspeaker to the earpiece port4. Further, the resonator also comprises an internal cavity 7, which may be ring, and a path 8 from the loudspeaker 6 to the internal cavity 7, to provide a specified resonance performance.

Abstract: A loudspeaker system of improved clarity, coherence and uniformity of energy distribution containing mid frequency sound chambers with an annular input and approximately rectangular output for use in multi-way co-axial horn loaded line array systems. The sound chambers propagate the annular mid frequency sound wave co-axially with a high frequency sound wave, gradually changing the cross section of the mid frequency wavefront resulting in co-linear acoustic mid and high frequency wavefronts from multiple devices which range from the shape of a flat ribbon to that of a curved ribbon. The sound chambers may be arrayed contiguously and placed at the entrance of a suitable waveguide to form a wide band width acoustic line source of extended length and controlled beamwidth.

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: Speaker systems with lower frequency of resonance have a short air passage in a cabient from the speakers or drivers to an air passage exit. Teh resulting column of air lowers the resonant frequency or the drivers from within a frequency range of interest to below the frequency range. With the resonance out of the way, the resulting system is smaller and smoother.

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 assembly for use in electronic devices especially hand held communication devices e.g. a cellular mobile telephone, comprising a loudspeaker (12) for emitting sound through a front cover (9), and a board (8) for mounting components, the board (8) having a first side (10) carrying user interface means (5) accessible through the front plate (9), and a second side (11), facing towards a back cover (7). The loudspeaker (12) is mounted between the board (8) and the back cover (7). Thereby the electronic devices can be made very compact.

Abstract: A bandpass loudspeaker enclosure having three sub chambers, a first subchamber being a Helmholtz-reflex chamber with a passive acoustic radiator operating in parallel with the transducer, and the remaining two chambers utilizing two passive acoustic radiators to achieve three Helmholtz-reflex vent tunings and a multiple of low pass acoustic filters that provide an acoustic bandpass with reduced diaphragm displacement and substantially reduced distortion and pipe resonances above the pass band. A further embodiment provides a reduced lowest frequency vent size for a given low frequency subchamber size and tuning frequency.

Abstract: In a preferred embodiment, a bandpass loudspeaker enclosure includes three sub chambers, a first one being a non-Helmholtz-reflex chamber of a sealed acoustic suspension construction, and the remaining two chambers utilizing two passive acoustic radiators to achieve two Helmholtz-reflex vent tunings and a multiple of low pass acoustic filters that provide an acoustic bandpass with a substantially 2nd order high pass characteristic combined with an extended, steeper, at least 4th order slope low pass stop band characteristic.

Abstract: A loudspeaker system includes an acoustical enclosure having an internal wall for dividing the enclosure into first and second sub-chambers. An electro-acoustical transducer having a vibratable speaker cone is mounted in an opening provided in the internal wall of the acoustical enclosure, while an internal vent is provided in the internal wall of the acoustical enclosure for pneumatically coupling the first and second sub-chambers. An external vent is provided in a wall of the first sub-chamber for pneumatically coupling the first sub-chamber to an exterior environment outside of the acoustical enclosure. Finally, a passive radiator is provided in a wall of the second sub-chamber for pneumatically coupling the second sub-chamber to the exterior environment.

Abstract: A loudspeaker system of improved clarity, coherence and uniformity of energy distribution containing mid frequency sound chambers with an annular input and approximately rectangular output for use in multi-way co-axial horn loaded line array systems. The sound chambers propagate the annular mid frequency sound wave co-axially with a high frequency sound wave, gradually changing the cross section of the mid frequency wavefront resulting in co-linear acoustic mid and high frequency wavefronts from multiple devices which range from the shape of a flat ribbon to that of a curved ribbon. The sound chambers may be arrayed contiguously and placed at the entrance of a suitable waveguide to form a wide band width acoustic line source of extended length and controlled beamwidth.

Abstract: A speaker apparatus comprises a speaker unit, a cabinet for forming an internal space on the rear side of the speaker unit with a plurality of wall surfaces including a baffle plate for use in mounting the speaker unit, a acoustic tube which is formed along at least one wall surface out of the plurality of wall surfaces and has not only a substantially uniform hollow section but also an opening at one end, and an acoustical material for separating the internal space from the internal space of the acoustic tube by closing the opening of the acoustic tube. The speaker apparatus is characterized in that the acoustic tube has a tube length about 1/(2n) (n=positive integer) time as large as a wavelength corresponding to the lowest resonance mode of the standing wave produced along the one wall surface out of the standing waves produced in the internal space and that the opening is disposed close to the node of the standing wave.

Abstract: A sound reproduction device according to the present invention may include a tuning device to minimize reflected sound distortion. The tuning device may include one or more sets of pre-tuned or adjustable chambers arranged perpendicular to the direction of sound propagation. It is emphasized that this abstract is provided to comply with the rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.

Abstract: A driver unit is fixed to a stand. A front box and a rear box are directly fitted to the stand through a buffer material. A box comes into contact with the driver unit through a buffer material and is fixed to the stand. Therefore, sound of the driver unit is not transmitted to the box and the drop of sound quality of the speaker can be prevented. The driver unit is fixed to the stand at an immovable foundation, and sound energy can be efficiently transmitted from a speaker cone to the air.

Abstract: An audio system has a cabinet with several partitions. The partitions divide the interior of the cabinet into compartments. These include an input compartment, an output compartment above the input compartment, an outer compartment to one side of the input and output compartments, and an intermediate compartment between the outer compartment and the input and output compartments. Two tweeters are mounted one above the other in the outer compartment as are two midrange speakers. The outputs of the midrange speakers open into the intermediate compartment while the outputs of the tweeters open to the atmosphere. A woofer or subwoofer is mounted on a partition which borders the input compartment, and the output of the woofer or subwoofer opens into the input compartment. The output compartment is provided with a port, and a pair of pipes connects the input compartment with the output compartment.

Abstract: A bandpass loudspeaker enclosure system including a first primary enclosure volume, a second primary enclosure volume and a dividing wall positioned between the first and second primary enclosure volumes and having a first opening therein. At least one electro-acoustic transducer is mounted at the opening on the dividing wall and includes a movable diaphragm having a first surface area side and a second surface area side. The first surface area side communicates into the first primary enclosure volume and the second surface area side of the movable diaphragm communicates into the second primary enclosure volume. At least one differential area passive radiator is provided, including (i) a primary diaphragm surface area having a primary peripheral attachment surround, and (ii) secondary diaphragm surface area having at least a secondary peripheral attachment surround.

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 speaker has a substantially reduced overall size while producing a complete low frequency sound range at high output amplitude. The speaker includes a main body having open sections at both ends thereof. A sounding body pinched by ringed first dampers is secured to each of the open sections of the main body so that the inside of the main body is kept air-tight. A first opening is provided at the middle part of the side of the main body. Lid members are secured on the outside of the two sounding bodies via a ringed second damper so as to keep the inside of the lid member air-tight. A second opening is created around the middle of the bottom of each of the lid members. A disc-like membrane is secured to the second dampers such that the lid members cover the membranes and cover the open section of the main body to keep the inside of the lid members air-tight.

Abstract: A piezoelectric speaker has a substantially reduced size and reproduces sound in the low sound range. The piezoelectric speaker includes a cylindrical main body. First and second sounding members are secured to apertures of both sides of the main body in an air tight arrangement via ringed dampers made of rubber. An external opening is created at the middle of a side surface of the main body. The opening is created so as to have an area which is less than area of a vibrating portion of the sounding members. Sound absorbing members are provided within the main body, on the outside of the first sounding member and on the outside of the second sounding member. Caps having a plurality of holes are secured to the apertures of the both sides of the main body so as to cover the sound absorbers. The main body is supported on concave portions of leg members.

Abstract: In the invented speaker system, a passive radiator 401 is mounted on a top board 403a of baffle 403 in a direction opposite to a speaker unit 402. The speaker unit 402 is mounted on the opening of a cylinder 403b protruding from top board 403a at a place inner from the end. The remaining part of the opening is closed with a sub-baffle 406, to form a front closed cavity 404 and a back closed cavity 405. In this way, both the passive radiator 401 and the speaker unit 402 are fixed to the top board 403a whose rigidity being the highest; which reduces the unwanted vibration.

Abstract: A loudspeaker system having a cross-cabinet horizontal array of loudspeakers for collectively generating a common acoustical wavefront when respective drivers associated with each of the loudspeakers of the array are similarly driven. The loudspeakers are secured to each other such that adjoining horn side walls for adjacent ones of the loudspeakers are substantially parallel to each other and are relatively deep in relationship to the total length of the loudspeakers, i.e., the length of the sidewalls is about 80% of the depth of the entire loudspeaker. Each horn is angled about 30 degrees off a central axis thereof to provide 30 degrees coverage in the horizontal plane and includes a first, essentially untapered, section which provides the aforementioned coverage in the horizontal plane and a second section having a taper of about 30% to prevent diffraction of the wavefront at the edges of the horn.

Abstract: An acoustic enclosure system for a loudspeaker includes a central chamber and two end chambers. The central chamber is separated from each of the end chambers by a common wall. Two loudspeakers are mounted in the central chamber such that one speaker is mounted in each of the horizontal walls and the speakers face away from each other. The central chamber has a port in a side wall that is open to the outside of the enclosure. Each of the end chambers contains a fluid chamber with a flexible bladder that is filled with fluid and maintained in the end chamber a given distance from the corresponding loudspeaker. Each of the bladders contacts the interior surfaces of the side walls and end piece that form the fluid chamber. A flexible support is provided underneath each of the bladders so that the bladders are each substantially maintained a specified distance from the horizontal walls.

Abstract: A speaker system comprises an acoustic tube with one end coupled to the back side of the speaker unit and the other end released to a sound field space through an opening window, and at least one air chamber disposed along the acoustic tube. The cross sectional area of the air chamber is larger than the cross sectional area of the acoustic tube, and the cross sectional area of the opening window is smaller than the cross sectional area of the acoustic tube. Therefore, the air chamber forms an acoustic filter so that the higher resonance frequency components in medium and high frequency region caused in the acoustic tube may not be radiated from the opening window, and formation of peaks and bottoms of frequency characteristic due to interference with the sound radiated from the front side of the speaker is prevented. The opening window of a small cross sectional area lowers the resonance frequency of the acoustic tube.