摘要:
A vented cover includes a pair of cross-flow ventilation ducts each including an acoustic noise reduction lining. The ducts are “cross-flow” in that they cross and bypass one another. The cover is affixed to an enclosure containing components of a computer system and abuts against a panel of the enclosure having an airflow aperture. An air moving device (AMD) passes air through the enclosure from the ducts if the cover is an intake cover, and/or into the ducts if the cover is an exhaust cover. The ducts increase the air path length, and the acoustic absorbing surface, thereby increasing acoustic attenuation. Airflow resistance is reduced by reducing surfaces perpendicular and close to the area where air enters and by reducing sharp turns in the ducts. The cover has a relatively thin depth because the ducts cross and bypass each other in a very space efficient manner.
摘要:
A system for assembling a wall including first and second panels is provided. The system includes a plurality of caps that are slip-fittable onto respective corners of the first and second panels. First and second pairs of the plurality of caps include hinge-caps configured to be pivotably coupled with one another via first and second hinges. The first and second pairs of the plurality of caps are configured for respective association with first and second pairs of opposite corners of the first and second panels such that the first and second panels are disposable in a shoulder-to-shoulder configuration with the first and second panels being pivotable about a rotational axis defined through the first and second hinges or movable relative to one another.
摘要:
An omnidirectional sound source is formed by mounting a loudspeaker in an enclosed baffle, preferably formed as a low profile hemi-spherical, convex cap with a small circular orifice at its apex and a planar base. The loudspeaker is mounted within the baffle, affixed to the underside of the baffle cap directly beneath the orifice. Substantially plane audio-frequency wavefronts emanating from the immediate vicinity of the loudspeaker diaphragm pass through the orifice and, by the process of diffraction emerge as spherical waves. The spherical wavefronts follow the smooth, axisymmetric, gently curved contour of the low-profile, hemispherical baffle and are not distorted by edge effects where the baffle joins its planar base. As a result, an omnidirectional sound source is obtained.
摘要:
An omnidirectional sound source is formed by mounting a loudspeaker in an enclosed baffle, preferably formed as a low profile hemi-spherical, convex cap with a small circular orifice at its apex and a planar base. The loudspeaker is mounted within the baffle, affixed to the underside of the baffle cap directly beneath the orifice. Substantially plane audio-frequency wavefronts emanating from the immediate vicinity of the loudspeaker diaphragm pass through the orifice and, by the process of diffraction emerge as spherical waves. The spherical wavefronts follow the smooth, axisymmetric, gently curved contour of the low-profile, hemispherical baffle and are not distorted by edge effects where the baffle joins its planar base. As a result, an omnidirectional sound source is obtained.
摘要:
A system for assembling a wall including first and second panels is provided. The system includes a plurality of caps that are slip-fittable onto respective corners of the first and second panels. First and second pairs of the plurality of caps include hinge-caps configured to be pivotably coupled with one another via first and second hinges. The first and second pairs of the plurality of caps are configured for respective association with first and second pairs of opposite corners of the first and second panels such that the first and second panels are disposable in a shoulder-to-shoulder configuration with the first and second panels being pivotable about a rotational axis defined through the first and second hinges or movable relative to one another.
摘要:
An acoustically absorptive panel is provided configured to reside above multiple electronics racks disposed in a row within a data center. The acoustically absorptive panel is configured to extend a height above the multiple electronics racks sufficient to at least partially block hot air recirculation from one or more air outlet sides of the multiple electronics racks to one or more air inlet sides of the electronics racks. The acoustically absorptive panel includes an acoustically absorptive material selected to attenuate noise, and in one embodiment, includes printed material on at least one side thereof related to one or more of the multiple electronics racks.
摘要:
A noise-reducing attachment apparatus for a heat exchanger door is provided for facilitating attenuation of noise emanating from an electronics rack. The apparatus includes a frame structure configured to coupled to the heat exchanger door. The door includes in air opening and air-to-liquid heat exchanger, and air passing through the air opening also passes across the heat exchanger. The air opening facilitates passage of external air through the electronics rack. The frame structure defines in part an airflow channel through the apparatus, wherein air passing through the air opening also passes through the airflow channel when the apparatus is operatively coupled to the door. An acoustically absorptive material, which is coupled to the frame structure and at least partially defines the airflow opening through the apparatus, is selected and positioned to attenuate noise emanating from the electronics rack when the apparatus is coupled to the heat exchanger door.
摘要:
A system is provided and includes a plurality of acoustic devices disposed in locations arrayed throughout a defined space, each one of the plurality of acoustic devices being receptive of acoustical attributes such as sound or noise levels generated in the defined space and configured to issue signals reflective of the generated acoustical attributes and an acoustic data unit disposed in signal communication with each of the plurality of acoustic devices. The acoustic data unit is receptive of the signals issued from the plurality of acoustic devices and configured to convert the signals into digital acoustic data and to output the digital acoustic data in a serialized format compatible with a network protocol.
摘要:
An acoustically absorptive apparatus is provided which includes an acoustically absorptive panel and an attachment mechanism. The acoustically absorptive panel is configured to reside along a side of an electronics rack, and includes a multilayer structure to attenuate noise. The attachment mechanism slidably mounts the acoustically absorptive panel to the electronics rack and facilitates sliding of the panel relative to the rack between retracted and extended positions. In the refracted position, the panel is disposed along the side of the rack, and in the extended position, the panel extends beyond a front or back edge of the electronics rack to facilitate attenuating noise emanating from the rack or an aisle alongside a row of multiple racks. In addition, the acoustically absorptive panel hingedly couples along a vertical edge to the attachment mechanism such that the panel is also rotatable outward away from the side of the electronics rack.