Abstract: This invention relates to microphone accessories for use with a hand-held microphone, and to a method of using a microphone. The microphone accessory in accordance with the invention has a body comprising an attachment formation for attaching the microphone accessory to the handle of the microphone, a holding portion to be engaged by a hand of the user, a cover portion coupled to the holding portion and substantially spaced therefrom so as to define a holding zone between the holding portion and the cover portion for receipt of the hand of the user to engage the holding portion, in use, wherein the cover portion substantially shields or covers the holding zone and/or the hand of the user; and a static non-electronically variable display device and/or an electronically variable display device. The invention also relates to a wearable microphone accessory.

Abstract: A docking station for a portable electronic device that includes a base having a lower surface arranged to lie on a support surface in use, an upper surface and an aperture communicating between the lower and upper surfaces; an annular pedestal having a lower end engageable with the aperture in the base and an upper end including a support for a device-engaging terminal of a cable, arranged so that a cable received in the channel may extend through the aperture and annular pedestal with the terminal secured to have its connector extend upwardly from the pedestal; a support extending upwardly from the base, the support being moveable between locations in adjustable spaced relation rearwardly of the pedestal; and a clamp for securing the support in a said location.

Abstract: A reflector for use with an electronic device having a loudspeaker for enhancing the sound emitted from the loudspeaker, said reflector comprising components for attaching said reflector to an edge of the electronic device, at the location of the loudspeaker, a flat portion located to be adjacent a surface of the electronic device, and a concave portion adjacent to the flat portion and presenting a concave surface to the loudspeaker.

Abstract: A portable electronic device packing case includes a packing body and a volume amplifying assembly received in the packing body. The volume amplifying assembly includes a volume amplifying body. The volume amplifying body includes a top wall formed on one end of the volume amplifying body, a side wall connected to the top wall, and a supporting member for supporting a portable electronic device positioned in the volume amplifying body. The top wall defines a plurality of sound holes therein, and the supporting member has a bottom surface defining a plurality of sound transmitting holes. The top wall, the side wall, and the supporting member cooperatively define a sound chamber for sound emitted by the electronic device to resonate therein.

Abstract: A phasing plug for a compression driver includes a base portion and a hub portion. The base portion includes a first side, a second side, and a plurality of apertures extending between the first and second sides. The hub portion extends from the base portion along an axis. The hub portion includes an outer surface and a plurality of ribs disposed on the outer surface. A plurality of recesses are defined by the outer surface and respective pairs of adjacent ribs. At least one aperture fluidly communicates with at least one of the recesses.

Abstract: A sound effect amplification diffuser includes a deck including a cover member defining a top bearing space, a sound collection hole at one lateral side of the bearing space, a sound collecting hood at the bottom side thereof around the sound collection hole and a sound grille at one side wall thereof opposite to the sound collection hole, a base member affixed to the bottom side of the cover member and an accommodation chamber defined between the base member and the cover member, and an amplification diffuser suspending in the accommodation chamber and connected between the sound collecting hood and the sound grille and adapted to enhance the intensity of the output sound of a mobile electronic device being positioned in the bearing space.

Abstract: An accessory for a portable electronic device having a speaker uses an acoustic wave guide to passively amplify and direct the output of the device's speaker. The accessory has a housing with a docking cavity formed therein. The docking cavity has supportive sidewalls that are adapted to receive and support the portable electronic device in an upright position. A cable access channel is formed in the docking cavity that allows a connector and cable to be coupled to the portable electronic device when the portable electronic device is mounted in the docking cavity. An acoustic waveguide having a spiral shaped acoustic chamber is positioned in the housing such that an entrance to the acoustic waveguide corresponds to a hole in the docking cavity that is positioned to correspond to the location of the speaker of the device when the device is mounted in the docking chamber. The exit of the acoustic chamber corresponds to an exterior opening in a sidewall of the housing and the hole in the docking cavity.

Abstract: A system and method for mounting modular audio-visual components on a surface such as a wall. In particular, a modular mounting bar may comprise at least one audio-visual module which may be affixed to a rail configured to be attached to a wall at a plurality of locations along the rail and configured to receive a module at a plurality of locations along the rail. A cover or grille may be configured to be attached in front of the modules.

Abstract: A protective sleeve having an external sound-amplifying member is configured to cover a portable electronic product having an audio port, and it includes a covering element covering the portable electronic product and a sound-amplifying member. A surface of the covering element is provided with a connecting hole in communication with the audio port. The sound-amplifying member is hollow and connected to the outside of the covering element. One end of the sound-amplifying member is formed into an insertion section inserted into the connecting hole, and the other end thereof is formed into a sound-amplifying section. The sound of the portable electronic product is emitted from the audio port and amplified through the sound-amplifying member and the sound-amplifying section. By this structure, an external loud speaker is unnecessary, and the protective sleeve itself can generate a sufficient sound-amplifying effect, thereby increasing the functionality and practicability of the protective sleeve.

Abstract: A protective sleeve having an external sound-amplifying member is configured to cover a portable electronic product having an audio port, and it includes a covering element covering the portable electronic product and a sound-amplifying member. A surface of the covering element is provided with a connecting hole in communication with the audio port. The sound-amplifying member is hollow and connected to the outside of the covering element. One end of the sound-amplifying member is formed into an insertion section inserted into the connecting hole, and the other end thereof is formed into a sound-amplifying section. The sound of the portable electronic product is emitted from the audio port and amplified through the sound-amplifying member and the sound-amplifying section. By this structure, an external loud speaker is unnecessary, and the protective sleeve itself can generate a sufficient sound-amplifying effect, thereby increasing the functionality and practicability of the protective sleeve.

Abstract: A middle frequency horn and high frequency horn assembly having a straight pathway with a shared unitary terminus defined by shared side walls which approach a perpendicular angle compared to the horn axis. The two air columns are separated and partially defined by an internal horizontal baffle in which the top and bottom surfaces are angled to decrease in vertical separation in both upward and downward directions starting from the vertical distance between the respective throat openings and decreasing in separation while progressing toward the mouth, where the angled surfaces intersect and terminate the baffle substantially proximate to the horn mouth.

Abstract: A method and system (50) for inducing multi-frequency vibrations in a vibration propagating structure, for example a seat (52), is disclosed. The system is comprised of an acoustic vibration transducer unit (12) mounted on a relatively flat and rigid surface (54?) such that the direction of movement of an actuating element in the unit is parallel to the surface. When the unit is driven by an amplified low frequency audio signal a person sitting in the seat experiences vibrations. Additionally, a series of vibration propagating structures, for example a row of seats at a movie theatre, can be connected in series via vibration-propagating members (60) between adjacent seats thereby allowing a single acoustic vibration transducer unit to propagate vibrations to all connected seats.

Abstract: A satellite speaker system includes a side firing low mid driver mounted in a sub-enclosure which is vented into a second sub-enclosure through an acoustic resistance vent and to a third sub-enclosure through a variable aperture second vent. The vents further serve as pivots to allow the side-firing speaker to be rotated through a predetermined range, simultaneously varying the aperture of the second vent. The pivots are isolated by o-rings to provide an airtight seal to the sub-enclosures, as well as to provide vibration control. Third, fourth and fifth resistively damped vents allow the first and second sub-enclosure to establish acoustic communication with the environment. The front firing driver/s that reproduces the mid and high frequencies are mounted in a fourth sub-enclosure.

Abstract: The invention relates generally to the field of audio loudspeaker enclosures, and more particularly to a method of mounting the internal components in the loudspeaker so as to control the loudspeaker output. Specifically a mounting structure and method for mounting the loudspeaker horn to its associated compression driver are disclosed. The mounting structure allows the directivity of the loudspeaker output, and the frequency/phase control of the loudspeaker, output to be controlled by the spatial arrangement of these components in the loudspeaker enclosure.

Abstract: A speaker assembly device for a door of a vehicle capable of being installed in vehicle doors of different thicknesses and shapes includes a speaker unit; a holder for mounting the speaker unit to a front portion thereof, the holder including an engagement portion at a back portion thereof; and a spacer including an engaging portion and an opposingly contacting portion, the engaging portion being engageable with the engagement portion of the holder and the opposingly contacting portion opposingly contacting the door of the vehicle.

Abstract: The present invention provides methods and apparatus for constructing an acoustic absorbing structure, such as a wall or enclosure, with removable and serviceable acoustic absorbing panels.

Abstract: An elliptical speaker system is provided for in-wall/in-ceiling mounting. The speaker system comprises an elliptical speaker frame or bracket defining a speaker front plane having a generally arcuate inner surface. First and second speaker components are mounted within the speaker frame, on opposing sides of the speaker inner surface. At least one of the speaker components may be translatable within the speaker frame.

Abstract: A mounting assembly for removably supporting a microphone in an operative position and in a manner which will protect the microphone against attenuating high impact phonetic peaks. A plurality of support assemblies are selectively attachable to one another to assume a variety of predetermined individually selectable configurations, wherein each of the predetermined configurations are determinative of a preferred operative orientation of the microphone. The plurality of support assemblies include a microphone support structured, to suspend the microphone in a predetermined orientation; a filter support structured, to adjustably support a filter in a substantially aligned, protective relation to the microphone; and an auxiliary support, structured to be removably and adjustably attached in supporting relation to at least one of said filter or microphone supports.

Abstract: A speaker structure having a simple configuration while maintaining good sound quality is disclosed. The speaker structure comprises a first speaker (20) having a first vibration plate (21), a first frame (22) for fixing the perimeter of the first vibration plate and a first magnetic circuit (24) for converting a signal into the vibration of the first vibration plate, a second speaker (30) having a second vibration plate (31), a second frame (32) for fixing the perimeter of the second vibration plate and a second magnetic circuit (34) for converting a signal into the vibration of the second vibration plate, and a fixing unit (50) for fixing the first magnetic circuit and the second magnetic circuit at their backs.

Abstract: A new approach has been developed to combine mid-range and high frequency sound into the throat of a horn designed for sound reinforcement. An acoustic low pass filter element is interposed between the lower frequency passage and the higher frequency passage, so that a smooth combination of the two frequency bands is achieved at the entrance to the horn bell. Thus, each frequency band has nearly identical dispersion, and the two sources have equal delay.

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. A preferably annular space is provided between the enclosure and the wave guide and a plurality of openings are provided between the enclosure at the open end of the enclosure. Out-of-phase sound waves produced by the speaker driver travel into the space and exit the speaker system through the openings.

Abstract: A system for sound diffusion, particularly at low and infra-low frequencies in rooms used for the reproduction of music and speech including at least one large horn enclosure and an architectural structure with a continuous or intermittent “multi-hemicylindrical” surface. The surface covers the walls of the room, for the diffusion/reflection of the sound in a broad spectrum of frequencies and with absorption that is adjustable at least at the low frequencies.

Abstract: A loudspeaker set comprises three loudspeakers 29, 30 and 31 for use with a PC having a monitor 24. The loudspeaker 31 is stationary and mounted on the monitor 24. The loudspeakers 29 and 30 are mounted on foldable stands 22 and 23 that enable these loudspeakers to be moved and held at either side of a listener's head 28 for use. The stands each consist of three pivotably connected hollow limbs that enable the loudspeakers to move horizontally and vertically with respect to a top of a table 27 into the position shown in the Figure. When not in use, the stands fold up with the limbs in line to store the loudspeakers 29 and 30 at the sides and behind the monitor 24.

Abstract: A system for sound diffusion, particularly at low and infra-low frequencies in rooms used for the reproduction of music and speech including at least one large horn enclosure and an architectural structure with a continuous or intermittent “multi-hemicylindrical” surface. The surface covers the walls of the room, for the diffusion/reflection of the sound in a broad spectrum of frequencies and with absorption that is adjustable at least at the low frequencies.

Abstract: A metal base assembly for speaker that combines with a magnetic circuit to produce a fluctuating magnetic field which drives an acoustic diaphragm into vibration to produce a warning alarm. The metal base assembly comprises a top pad, a middle pad, a bottom plate, positioning rivets, a magnetic plate and a metal plate. The positioning rivets couple the top pad, the middle pad and the bottom plate together forming the metal base assembly with a recess cavity for accommodating the magnetic plate and the metal plate. Under influence of a magnetic force generated by a circular magnetic field generator, an acoustic diaphragm inside the speaker is made to vibrate rapidly producing a high tone warning alarm.

Abstract: A camera having means for detecting sound in a bi-directional manner. A microphone, for example a first order gradient microphone, is placed within a camera body and is in communication with two apertures extending from the front and rear surfaces of the camera body. Background noise is reduced and sound from the scene being photographed and the user of the camera is preferentially detected by the microphone. Preferably, the microphone is mounted in a substantially resilient and acoustically opaque material to reduce stray noises, such as from the motors of the camera.

Abstract: An improved exhaustion noise suppressing apparatus for a hermetic compressor directed to minimizing vibration of a refrigerator cycle pipe mechanism caused by a pressure difference of an exhausting gas pressure of the exhausting gas which is discharged from the system to the outside of the compressor by providing a damping member for offsetting a pressure wave form of the refrigerant gas to one side of the interior of the exhaustion noise suppressing unit wherein the compressed refrigerant gas discharged from the cylinder and the exhausting chamber is introduced into the loop pipe through the head cover and the exhaustion noise suppressing unit.

Abstract: A holder is provided for a remote controller of a karaoke machine. The holder causes the remote controller to be removably held to a handle of a microphone. The holder comprises a portion of an elastic material, such that the portion can tightly fit an outer surface of the handle of the microphone. Further, the holder comprises an approximately C-shaped portion or an approximately ring-shaped portion which matches an outer shape of the handle of the microphone. The remote controller comprises infrared-ray-emitting diodes for emitting a signal in response to a user operating the control buttons to the karaoke machine. A signal-receiving means receives the signal emitted by the signal-emitting means, the signal-receiving means then outputting a relevant signal to the karaoke machine for amplifying a voice input through the microphone, adding accompaniment to the thus-amplified voice and outputting a resulting sound.

Abstract: An acoustic horn assembly for use as part of an electronic siren system for an emergency vehicle comprises a pair of integrated molded, rigid plastic members which cooperate to define a pair of divergent sound passages. The entrance ends of these sound passages are displaced do that they may be coupled to separate sound generators, the sound generators being supported from respective vehicle frame side rails. The sound generators are coupled to the sound passage entrance ends by adjustable length sound transmission conduits which are in the form of elbows.

Abstract: A loudspeaker system and a loudspeaker housing system uses a plurality of smaller rated loudspeakers to generate a high-level output. Specifically, the plurality of loudspeakers are housed in a corresponding number of substantially cylindrical sound collecting tubes, one tube for each loudspeaker. Sound waves, which are generated toward the rear of each loudspeaker and which are otherwise attenuated by the insulation material or reflected by baffles and/or walls and ultimately dissipate, instead travel through the tube, the tube forming a sound traveling path. Each tube converge and merge smoothly into a single substantially cylindrical tube. The sound waves traveling through the individual tubes are merged at the converged tube. The outlet of the single converged tube is connected to or is integral with a conventional or specialized sound concentrating horn to direct the captured sound to a desired direction.

Abstract: The horn housing may comprise an inner metal shell in the shape of a hexagonal box open at one end fitting into a similarly shaped outer dense solid box similarly open at one end. Space between the inner and the outer boxes being filled by a low density sound absorbing filler, and the inner box being connected to the outer box by vibration absorbing bolts. The outer box is mounted to a structure by vibration absorbing mounting brackets. When a high decibel horn or siren is mounted in the inner box to directed sound through the opening, most of the sound propagating sideways towards the structure is absorbed by the housing increasing the comfort level of passengers or crew inside the structure.

Abstract: This invention relates to a loudspeaker having at least one 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 from the rear of the speaker diaphragm. The sound collecting tube is particularly useful for directing and boosting sound waves emitted from the rear of the speaker which is otherwise dissipated or absorbed by the loudspeaker housing material or insulation. In addition, conventional or specialized sound horns may be readily attached to the outlet end of the sound collecting tubes which can direct sound waves emitted by the speaker to any desired direction.

Abstract: A two-piece megaphone assembly having a conically-shaped member and an ornamental headpiece which attaches by means of interlocking attachment lugs to the large diameter end of the conically-shaped member. The headpiece is comprised of two symmetrical halves which fold clamshell-like around the conically-shaped member and snap into place. The headpiece may resemble, for example, an animal or human face having an open mouth.

Abstract: The direct and reverberant sound fields heard at a live musical performance are reproduced by a speaker enclosure consisting of two sub-enclosures mounted on a base with each subenclosure housing at least one speaker, thereby realistically reproducing the music.

Abstract: The present invention pertains to a warning apparatus with respect to a ski-pole. The warning apparatus is comprised of a device for signaling that does not require the ski-pole to be seen in order for a signal provided by the signaling device to be noticed. The signaling device is in juxtaposition with the ski-pole. Additionally, the warning apparatus is comprised of a device for activating the signaling device. The activating device is in communication with the signaling device. In a preferred embodiment, the activating device includes a device for powering the signaling device and a device for actuating the powering device so the signaling device receives power to produce a signal.

Abstract: Disclosed is an acoustic horn to aid in bulk powdered material handling particularly from trucks and railroad cars. Such acoustic horn is comprised of an external cone having a driver affix thereto. There is also an inverted internal cone contained within the external cone. There is a cylindrical throat communicating with the acoustic wave driver which extends into the internal cone, the combination of the throat extending into the internal cone contained within the external cone creates a folded horn arrangement wherein a horn of relative shortened length can achieve the desired low fundamental frequencies needed for bulk powdered material handling.Extending radially from the mouth of the external cone is a flange. Means are provided to detachably affix said flange from the flange on existing manways present on trucks and railroad cars.

Abstract: A second order gradient microphone with unidirectional sensitivity pattern is obtained by housing each of two commerically available first order gradient microphones centrally within a baffle. The baffles have flat surfaces, are preferably square or circular and have parallel surfaces the two baffles being parallel to each other. The rotational axes of the microphones are arranged to coincide. The output signal from one of the microphones is subtracted from the delayed signal output of the other.

Abstract: An automobile speed control system is provided with a speed signal generator circuit for generating first electrical signal indicative of actual automobile speed and a desired automobile signal supply circuit for supplying a second electrical signal indicative of the desired automobile speed. The first and second signals are compared to provide a throttle valve control signal and an alarm circuit including an audible and/or visual alarm is provided to warn the driver when the actual automobile speed exceeds a pre-set speed.

Abstract: This speaker represents an improved trumpet horn speaker structure. A trumpet horn speaker is disclosed having a metallic heat sink, a lower magnetic pole mounted on the heat sink, a round permanent magnet mounted on the heat sink, an upper magnetic mounted on the heat sink, a damping bracket mounted on the heat sink, a plastic housing integrally mounted to the heat sink so that the upper magnetic pole, the lower magnetic pole and the round permanent magnet are thereby tightly secured to the plastic housing, the plastic housing providing a good waterproofing for the trumpet horn speaker and the metallic heat sink providing protection against over heating for the voice coil of the trumpet horn speaker.

Abstract: An improved acoustic unit base for electropneumatic horns, of the type comprising a main body peripherally seamed to an end piece with a diaphragm therebetween. Said main body is formed by connecting together a first and a second member of deep-drawn sheet metal, the first comprising a central hole and the second forming a cylindrical seat for receiving a bush with a lipped opening which rests on the diaphragm.

Abstract: An accessory for mounting on the receiver of a personal paging system. The receiver is normally worn below ear level and the accessory increases the sound of the paging signals reaching ear level.

Abstract: The invention pertains to electric horns for automobiles wherein a metal horn motor housing is assembled to a sound projector formed of synthetic plastic. A metal insert is molded into the projector having a metal flange extending from the projector adjacent a projector mounting surface whereby the insert flange is deformed upon the motor housing to produce an effective mechanical interconnection and assembly of the motor housing and projector.