Abstract: Apparatus and method for attenuating sound generated by machinery is disclosed and is particularly relevant to noises and sounds emanating from domestic appliances such as dishwashers. The enclosure of the dishwasher is lined with a sound absorbing material which includes holes or openings therein to permit the extension of portions of the appliance's apparatus or equipment mounted within the enclosure to be positioned closer to the interior surface of the enclosure than to an interior surface of the absorbing material. Caps are formed of material having the same recipe as the absorbing material but having a different density and which are compressed, heated, and subsequently placed over said openings to completely enclose the machinery and equipment within the appliance enclosure.

Abstract: The present invention relates to a device for the passive reduction of the sound vibrations in a liquid resulting from a sound source arranged below the liquid level of a body of water, the device comprising an elongate tube which can be arranged over the sound source, the tube comprising an outer wall and inner wall, wherein the tube is designed to maintain a certain desired pressure in the intermediate space between the inner and outer wall. In this case, the pressure is reduced with respect to the ambient pressure. As a result of the reduced pressure, the sound vibrations will less readily travel to the outside and the noise level in the area around the tube is reduced.

Abstract: An improved exhaust fan housing, and exhaust fan assembly so characterized, is generally provided. The exhaust fan housing includes a first cylindrical or conical element, a second cylindrical element interior of the first cylindrical element, and a plurality of hollow vanes traversing an annular fluid passage chamber delimited thereby and uniting the first and second cylindrical elements. A central drive chamber, delimited by the second cylindrical element, is in fluid communication with ambient air exterior of the first cylindrical element via the hollow vanes. Each hollow vane is characterized by spaced apart wall segments which unitingly terminate so as to delimit a leading edge for each hollow vane, each of the spaced apart wall segments having a free end or a closed end delimiting first and second trailing edges for the hollow vanes.

Abstract: A speaker system includes a case having a receiving chamber; a variable mechanism received in the receiving chamber for dividing the receiving chamber into a first chamber and a second chamber and being capable of varying a volume of the first chamber; and a speaker unit is received in the first chamber and defining an acoustic port facing an exterior of the case. The separating wall alternatively inserts into one of the receiving member for placing the separating wall precisely at specific locations. Thus, it is easy to vary the volume of the first chamber for achieving an excellent acoustic capability of the speaker system.

Abstract: Disclosed is a method for modifying the frequency response of a wood panel within an acoustical structure such as a studio or concert hall. The modification is imparted by exciting the wood paneling with acoustic energy. Frequency response is the measure of a system's spectrum response at the output to a signal of varying frequency (but constant amplitude) at its input. The acoustic energy includes at least one excitation frequency, which is preferably in the audible spectrum (20 to 20,000 Hz). The use of acoustic energy from the remote source provides non-contact excitation of the wood paneling. In one embodiment, the acoustic energy is at least one sound wave which comprises at least one resonant frequency of the wood paneling, at least one acoustic mode of the wood paneling, at least one discrete broadband frequency, a composite frequency (including multiple broadband frequencies, white noise and pink noise) or any combination thereof.

Abstract: An apparatus for creating acoustically beneficial conditions for audio and voice recording on the go, in limited space and/or time conditions with sound absorbing inner layer made out of flexible durable material such as acoustic blankets. A preferred embodiment includes supportive rigid elements, internal light and copy support elements and durable outer layer. Acoustic layer can be extended to increase the area of coverage, it can be set up and operational from folded down transportation state in under 20 seconds and put away as quickly, it is light weight, washable and can be used as a travel bag when traveling.

Abstract: The present invention relates to speaker enclosures utilizing the golden ratio geometrically throughout the design to reduce reflections, resonance and phase shifting, and to improve the transient response. Enclosures can be box-shaped, trapezoidal, suspended or otherwise configured. The enclosure has a driver wall, a baffle and a rear wall. The driver wall and baffle define a front chamber, and the baffle and rear wall define a rear chamber. The volumetric ratio between the rear chamber and front chamber can be approximately 0.6. The rear chamber also can have braces or dividers that segment the chamber into a central portion and two side portions. The volumetric ratio between the side portions and the central portion can be approximately 0.6. Ports of various configurations are provided. Braces can be used in conjunction with the ports to diffuse the incoming air. The baffle can have a plurality of radiused holes there through.

Abstract: The invention relates to a component (1) for motor vehicles, in particular in exhaust systems or in independent heaters, comprising a carrier (2), wherein the carrier (2) has a predefined structural stiffness and a plate (3) for increasing the predefined structural stiffness of at least a part of the carrier (2), wherein the plate (3) is fixed to the carrier (2) via at least one connection (4), wherein the plate (3) comprises at least one honeycomb structure (W). The invention likewise relates to a method for producing a component (1) as well as a use.

Abstract: A noise reduced compressor has a body, an energy dissipation element, and a structural element configured to retain the energy dissipation element relative to the body. A noise reducer for an HVAC system compressor has an energy dissipation element and a structural element connected to the energy dissipation element. A method of reducing compressor noise includes disposing an energy dissipation element between a body of the compressor and a structural element and compressing the energy dissipation element against between the body of the compressor using the structural element.

Abstract: An apparatus for creating acoustically beneficial conditions for audio and voice recording on the go, in limited space and/or time conditions with sound absorbing inner layer made out of flexible durable material such as acoustic blankets. A preferred embodiment includes supportive rigid elements, internal light and copy support elements and durable outer layer. Acoustic layer can be extended to increase the area of coverage, it can be set up and operational from folded down transportation state in under 20 seconds and put away as quickly, it is light weight, washable and can be used as a travel bag when traveling.

Abstract: The present disclosure relates to a speaker cabinet for electronic device, which is disposed in an electronic device and comprises a cabinet body, two first fixing structures, two dampers, and two second fixing structures. The damper is disposed on two side surfaces of the cabinet body through the two first fixing structures and fixed on the electronic device through the two second fixing structures for fixing the cabinet body in the electronic device. The cabinet speaker according to the present disclosure adopts only two fixing structures to fix the cabinet body to the electronic device. The damper is also used for mitigating the vibrations generated by the cabinet body. In addition, the two fixing structures are used for supporting the damper for avoiding inclination of the cabinet body towards an unpredictable direction and colliding the housing of the electronic device and its internal components.

Abstract: An integrated rigging system for loudspeakers comprises top and base front and top and base rear rigging structures for mounting to the internal framework of the loudspeaker and for forming the top front, base front, top rear and base rear portions of the loudspeaker's enclosure, and a plurality of links, each link extendable from a link stowing channel in one of the rigging structures into a link receiving slot in the corresponding rigging structure of the enclosure of an abutting loudspeaker for linking the rigging structure of the loudspeaker with the corresponding rigging structure of the enclosure of the abutting loudspeaker.

Abstract: An apparatus for damping sound in the optical beam path of a microscope, having an acoustic insulation housing for encapsulating a sound-emitting component, preferably a rapidly moving or oscillating beam deflection means, in particular a resonantly oscillating mirror, the housing comprising at least one optical entrance/exit opening, is characterized in that the housing, preferably the opening of the housing, is embodied and/or configured in such a way that the sound otherwise emerging from the housing is largely extinguished by destructive interference without thereby influencing the optical beam. A microscope having a corresponding apparatus is furthermore claimed.

Abstract: An exemplary electronic device includes a box, a speaker, and a micro structure. The box includes a shell and a cover disposed on the shell. The speaker is sandwiched between the shell and the cover. The micro structure includes a plurality of flat-bottomed protruding portions, a plurality of first pyramidal protruding portions, and a plurality of second pyramidal protruding portions.

Abstract: The invention is comprised a sound deadening or sound buffering material including but not limited to, foam, plastic, or fabric that covers at least part of the child, thereby reducing both the decibel level coming from the child and the decibel level coming to the child. This creates a quieter environment for the child while serving a dual purpose to reduce any noise coming from the child.

Abstract: Systems and methods to remove heat from an acoustic enclosure are provided. An apparatus includes an enclosure and a free convection passage located within the enclosure. The convection passage includes a non-horizontal convection inlet acoustic port having an inlet opening to the ambient environment and a non-horizontal convection outlet acoustic port having an outlet opening to the ambient environment. At least one heat producing element is coupled to an acoustic port of the free convection passage via a low thermal resistance conduction path. Heat produced by the heat producing element initiates a unidirectional free convective airflow in a direction corresponding to a path between the convection inlet acoustic port and the convection outlet acoustic port.

Abstract: The present invention relates to a method and a device for environmentally friendly ramming under water. To reduce the noise input under water, the machine and the material that is to be rammed are surrounded by a fixed flooded sleeve. The sleeve advantageously has a sandwich-like structure.

Abstract: An electric operation apparatus capable of opening interiors of front and rear portions of an apparatus main body frontward and rearward to make it easy to carry out assembly and maintenance inside the main body. Front and rear pivot shafts are provided on inner side surfaces of side plates of the main body so as to extend in the left-right direction of the main body. Front and rear panels are openable and closable relative to the main body by being pivoted about the pivot shafts, with their engagement recesses in engagement with the pivot shafts. The front and rear panels cover the main body when they are in closed states, and open the interior of the main body when they are in open states. The front panel is opened by being pivoted rearward, whereas the rear panel is opened by being pivoted forward.

Abstract: Acoustic enclosure for mounting loudspeakers (1) that contains a certain number of curved-profile guides (8) arranged radially beside one another at a specific distance and forming a ring (7), between which the sound from the loudspeaker is propagated from the central space (6) to the outer ring (9), which it enters obliquely as a result of the curvature of the guides. Since said ring (9) contains no elements against which the sound can be reflected back into the conduits, it works like a closed circuit or track that the sound passes through until it is exhausted, keeping the inner face of the membrane of the loudspeaker free of disturbances that, in conventional enclosures, are caused by the reflected sound when it hits the membrane during the lifetime of the sound, thereby eliminating the distortion and alterations of the natural response linearity of the loudspeaker from this source.

Abstract: The present invention relates to speaker enclosures utilizing the golden ratio geometrically throughout the design to reduce reflections, resonance and phase shifting, and to improve the transient response. Enclosures can be box-shaped, trapezoidal, suspended or otherwise configured. The enclosure has a driver wall, a baffle and a rear wall. The driver wall and baffle define a front chamber, and the baffle and rear wall define a rear chamber. The volumetric ratio between the rear chamber and front chamber can be approximately 0.6. The rear chamber also can have braces or dividers that segment the chamber into a central portion and two side portions. The volumetric ratio between the side portions and the central portion can be approximately 0.6. Ports of various configurations are provided. Braces can be used in conjunction with the ports to diffuse the incoming air. The baffle can have a plurality of radiused holes there through.

Abstract: A speaker system includes an enclosure defining a resonance chamber, a loudspeaker received in the resonance chamber, and a sound wave reflecting member. The enclosure includes a front panel and a base. The loudspeaker is exposed at the front panel. The base includes a back panel facing the front panel, an inner tube, and an outer tube. The back panel defines a back bass port. The inner tube and the outer tube extend from the back panel and are received in the resonance chamber. The inner tube surrounds the back bass port. The outer tube surrounds the inner tube. The sound wave reflecting member is coupled with the outer tube and the inner tube. The sound wave reflecting member, the outer tube, and the inner tube cooperatively form a resonator. The resonator communicates with the resonance chamber and the back bass port.

Abstract: A box-shaped enclosure of a storage box includes a deadening wall or walls defining a storage space between first and second planes. The storage space is open at the first and second planes. A deadening wall member extends along the first plane. An auxiliary box-shaped enclosure is connected to the box-shaped enclosure so as to close the first plane of the box-shaped enclosure. The auxiliary box-shaped enclosure defines an auxiliary space isolated from the storage space with a deadening wall member. The storage space is connected to the fresh air through the ventilation opening and the auxiliary space. The deadening wall or walls of the box-shaped enclosure and the deadening wall member serve to prevent the leakage of the operating sound.

Abstract: A portable sound box includes a main body and a clip. The main body includes a battery for supplying power to the portable sound box. Thus, the portable sound box can supply power on its own. The clip is fixed to the main body and configured for clipping to an external object. Thus, the portable sound box can attached to the external object instead of standing on a surface.

Abstract: The invention provides a microelectromechanical system testing device, comprising an acoustic chamber having two opposing walls; a sound source for generating sound within the acoustic chamber at a first frequency in the range of 20 Hz to 10 kHz, the sound source being arranged at one of the opposing walls; and an interface for coupling one or more microelectromechanical systems thereto, the interface being arranged at the other of the two opposing walls and comprising a respective coupling site for each microelectromechanical system; wherein the acoustic chamber is adapted to have a total harmonic distortion (THD) at each coupling site of the interface for the first frequency below 1%, preferably below 0.8%, more preferably below 0.6%, most preferably below 0.4% when including all harmonics of the first frequency in the range of 20 Hz to 20 kHz, in particular for the first frequency being 1 kHz or 4 kHz.

Abstract: The present invention provides methods and devices for the abatement of noise emanating from surgically created abdominal stomas. In one embodiment, the present invention provides a sound abatement device for an abdominal stoma. The device includes a noise suppressor formed of sound dampening material, which defines an opening and cavity suitable in size and shape for receiving and enveloping a stoma formed through a body wall of an individual. The device further includes a support arm extending from the noise suppressor, which includes a first end connected to the noise suppressor and a second end disposed opposite thereof. The device further includes a base member disposed proximate the second end of the support arm, which includes an attachment for connection to an individual. The device also includes an attachment feature for releasable attachment of the second end of the support arm to the base.

Abstract: The invention relates to a component (1) for motor vehicles, in particular in exhaust systems or in independent heaters, comprising a carrier (2), wherein the carrier (2) has a predefined structural stiffness and a plate (3) for increasing the predefined structural stiffness of at least a part of the carrier (2), wherein the plate (3) is fixed to the carrier (2) via at least one connection (4), wherein the plate (3) comprises at least one honeycomb structure (W). The invention likewise relates to a method for producing a component (1) as well as a use.

Abstract: An acoustic suppression system for absorbing and/or scattering acoustic energy comprising a plurality of acoustic targets in a containment is described, the acoustic targets configured to have resonance frequencies allowing the targets to be excited by incoming acoustic waves, the resonance frequencies being adjustable to suppress acoustic energy in a set frequency range. Methods for fabricating and implementing the acoustic suppression system are also provided.

Abstract: To increase air flow, an air intake/outtake (i.e., intake, outtake, or both) is positioned on a front surface of a housing, such as a rack-mounted computer network switch housing. The front surface includes jacks, controls, plugs, receptacles or other input/output for connection with the processor in the housing. The air intake/outtake is one or more openings on the front surface with the input/output components. In one embodiment, to avoid interference with the input/output components and increasing the height of the housing, the air intake/outtake is a slot extending most of or all of the distance between the sides of the housing and being above or below the input/output. An intermediate plate may be used to form and support the air intake/outtake.

Abstract: A device has at least one region to be damped for the purpose of noise reduction. The at least one region may, in particular, be a wall region, for instance of an electrical device housing, and it is covered at least partially by at least one vacuum panel. In the noise reduction method, a vacuum panel is pulled by vacuum pressure against the region to be damped, so that a hollow space under vacuum pressure is formed between the vacuum panel and a housing.

Abstract: [Subject] The subject of the present invention is to provide a shock and sound absorbing material having a light weight, and demonstrating an excellent shock and sound absorbing performance. As a method for solving the subject, the present invention provides a shock and sound absorbing material 1 comprising a porous component 2, and a surface material 3 which is laminated onto the porous component 2, wherein the surface material 3 has at least one layer made of a stretchable paper material 5. The shock and sound absorbing material 1 is installed on a cover panel 7 covering a sound source such as an engine cover, and the porous component 2 is set so as to face the cover panel 7, with the surface material 3 being set so as to face the sound source, and form a cell structure between the cover panel 7 and the surface material 3.

Abstract: An exemplary embodiment of the present invention provides a silencer. The silencer includes an enclosure with a first airflow path configured to allow air to pass through the enclosure and attenuate noise entering the enclosure. The enclosure also includes an opening configured to provide a second airflow path if the first airflow path is obstructed.

Abstract: An engine room for construction equipment is provided, which can minimize emission of noise generated in an engine room due to driving of an engine and a ventilating fan to an outside of the engine room by absorbing the noise through a noise trap, and can improve the cooling performance of corresponding components by smoothing inhalation/discharge of an external air to/from the airtight engine room.

Abstract: A speaker cabinet includes at least one speaker contained in the speaker cabinet, and a speaker covering shrouding the at least one speaker, wherein the speaker covering is movable to expose the at least one speaker. The speaker covering motion may be automatic and provided by an electromechanical motion control system including at least one electric actuator and at least one electric actuator drive circuit. The automatic speaker covering motion may be activated by the electromechanical motion control system in response to an audio signal received by the speaker cabinet.

Abstract: An acoustically resistive protective cover assembly for an opening in a casing is provided, the casing separates an enclosed space from the ambient space and has an exposed face oriented toward the ambient space and an internal face oriented toward the internal space. The cover assembly comprises an acoustically resistive porous material disposed upon the exposed face of the case and an acoustically resistive water repellant material disposed upon the internal face of the case.

Abstract: An air conditioner includes a cabinet configured to define an outer appearance of the air conditioner. The air conditioner also includes a front panel coupled to the cabinet and having an intake hole. The air conditioner further includes a fan assembly positioned within the cabinet and configured to guide a flow of air in the cabinet. The air conditioner further includes an intake panel configured to move to open or close the intake hole in response to a control signal. In addition, the air conditioner includes at least one noise reducing part positioned in the intake panel and configured to reduce a noise having at least one frequency bandwidth.

Abstract: The invention relates to a reflex loudspeaker construction (1, 2, 3), which comprises a loudspeaker chamber (30) delimited by the reflex loudspeaker construction (1, 2, 3), a reflex channel (5) connected to the loudspeaker chamber (30), which connects the loudspeaker chamber (30) to the external space of the reflex loudspeaker construction (1, 2, 3), and at least one loudspeaker element (7) connected to the reflex loudspeaker construction (1, 2, 3), which forms part of the structure delimiting the loudspeaker chamber (30). According to the invention, the reflex loudspeaker construction (1, 2, 3) comprises at least two components (2, 3), which can be repeatedly detached at least partly from each other, without dismantling, in order to use the loudspeaker chamber (30) as a transportation space.

Abstract: Mobile soundproof enclosure with changeable internal room shape and optional ventillation noise cancelling device consisting of a frame that can be assembled and disassembled by a single person without using tools and that in disassembled state is small enough to fit in a trunk of a car; a cover made with flexible sound absorbent sheet material creating completely enclosed room with double walls with air space in between, corner sound traps made with flexible sound absorptive sheet material that can be individually positioned to change internal shape of the room and an air vent noise cancelling device made with flexible sound absorbing sheet material having inlet portion, which enters a center portion at an angle, the center portion larger than the inlet portion and outlet portion which exits the center portion at an angle; the whole enclosure can be disassembled to compactly fold for easy storage or transportation.

Abstract: A method and apparatus for providing a loudspeaker assembly is provided. In accordance with at least one embodiment, a method is provided for mounting a loudspeaker driver in a loudspeaker driver aperture defined in a ground plane and installing a grille in relation to the ground plane such that a distance between the grille and the ground plane decreases as the distance from the loudspeaker driver increases. In accordance with at least one embodiment, apparatus is provided comprising a ground plane, a loudspeaker driver mounted in a loudspeaker driver aperture of the ground plane, and a grille positioned relative to the ground plane such that a distance between the grille and the ground plane decreases with increasing distance from the loudspeaker driver.

Abstract: A method and apparatus for providing a loudspeaker assembly is provided. In accordance with at least one embodiment, a method is provided which comprises forming a loudspeaker frame so as to define a driver housing portion, a horn portion, and a conformal portion. A driver aperture is defined for the driver housing portion, and a port aperture is defined for the horn portion. A driver is attached to the loudspeaker frame proximate to the driver aperture. A rear baffle is applied to a first conformal portion surface of the conformal portion of the loudspeaker frame. The rear baffle defines a horn cavity wall of a horn cavity of the horn portion. The horn cavity has an increasing cross sectional area as the distance from the driver housing portion increases. A grille is applied to a second conformal portion surface of the conformal portion of the loudspeaker frame.

Abstract: The present invention generally relates to stereo sound boxes, and more particularly to a sound box assembly containing micro stereo sound boxes joined magnetically together. The sound box assembly contains at least a pair of sound boxes with magnets of opposite polarities, respectively, so that the sound boxes could be magnetically attracted together for convenient transportation and then later could be easily detached for placing apart to achieve superior stereo sound.

Abstract: An enclosure for a blender including a body portion adapted to be secured to a base, and a cover pivotally attached to the body portion. The body portion includes sidewalls, a back wall, and an abbreviated top wall. The cover includes sidewalls, a front wall, a top wall, and an abbreviated back wall. A flange extends outwardly from the sidewalls and the top wall of the body portion and a gasket is provided thereon to create a seal between the cover and the body portion of the enclosure.

Abstract: A booth for confining and acoustically isolating musical drum instruments and musicians therefor has a rear wall, front wall assembly having a number of plastic windows interconnected in a polygonal path, and a ceiling member. The windows are supported by pedestal blocks and secured in place by vertically opposed troughs in the ceiling member and pedestal blocks.

Abstract: A loudspeaker having a speaker basket including a basket rim, a speaker mounting hole, and a coupling hole disposed through the basket rim. The loudspeaker includes a first grill coupling engaged with the coupling hole, as well as a grill removably attached to the basket rim via the first grill coupling. The grill defines a solid surface portion which completely covers the speaker mounting hole and the coupling hole. The first grill coupling is interposed between the basket rim and the grill.

Abstract: A portable sound recording device and method comprises a first enclosure having symmetrical halves and a second enclosure having symmetrical halves. The second enclosure is fitted inside the first enclosure such that neither enclosure has direct contact with each other. The symmetrical halves pivot about the device handle. A sound resistant material aligns the inside walls of the second enclosure and the outside walls of the second enclosure. The device eliminates unwanted echoes and allows sound to be clearly captured by an attached microphone or input device.

Abstract: A noise attenuating method, and a system thereof, for controlling acoustical noise in an electronic equipment enclosure is disclosed. The noise attenuating system includes one or more noise attenuating inserts configured to be removably attached to the electronic equipment enclosure so as to block noise from at least one electronic device contained in the electronic equipment enclosure and to channel an airflow from an inlet point to one or more outlet points of the electronic equipment enclosure. The method includes arranging one or more noise attenuating inserts within an electronic equipment enclosure such that the noise attenuating inserts simultaneously block noise from at least one electronic device contained in the enclosure and channel an airflow path circulating therein.

Abstract: The invention provides a microelectromechanical system testing device, comprising an acoustic chamber having two opposing walls; a sound source for generating sound within the acoustic chamber at a first frequency in the range of 20 Hz to 10 kHz, the sound source being arranged at one of the opposing walls; and an interface for coupling one or more microelectromechanical systems thereto, the interface being arranged at the other of the two opposing walls and comprising a respective coupling site for each microelectromechanical system; wherein the acoustic chamber is adapted to have a total harmonic distortion (THD) at each coupling site of the interface for the first frequency below 1%, preferably below 0.8%, more preferably below 0.6%, most preferably below 0.4% when including all harmonics of the first frequency in the range of 20 Hz to 20 kHz, in particular for the first frequency being 1 kHz or 4 kHz.

Abstract: A box-shaped enclosure of a storage box includes a deadening wall or walls defining a storage space between first and second planes. The storage space is open at the first and second planes. A deadening wall member extends along the first plane. An auxiliary box-shaped enclosure is connected to the box-shaped enclosure so as to close the first plane of the box-shaped enclosure. The auxiliary box-shaped enclosure defines an auxiliary space isolated from the storage space with a deadening wall member. The storage space is connected to the fresh air through the ventilation opening and the auxiliary space. The deadening wall or walls of the box-shaped enclosure and the deadening wall member serve to prevent the leakage of the operating sound.

Abstract: The present invention relates to versatile multi-layer (A)(B) coating systems for anti-flame purposes especially for protection of expanded organic polymers (C) leading to improved fire retardant properties together with low smoke generation, the process for manufacturing of such systems, the application of such systems on substrates and the use of such systems and resulting composites.

Abstract: The invention relates to a cladding part for components. The cladding part has at least two areas with different vibration damping properties. The different areas make it possible in a simple manner to meet partly conflicting requirements for cladding parts of the components in an optimum manner. The components include medical examination devices.

Abstract: Noise reduction baffle for a fuel tank comprising a lower carrier and an upper sliding part which can slide relatively to the carrier thanks to compression springs mounted on retainers, said lower carrier having a hollow foot comprising two vertical or inclined walls defining an open cavity of elongated shape having a longitudinal axis, said cavity comprising at least one rib making an angle with the longitudinal axis of the cavity.