According to one embodiment, a disk device includes a plurality of recording media, a plurality of magnetic heads, a plurality of blades, and a housing. The recording medium has a recording surface, is rotatable around a rotation axis extending in an axial direction intersecting the recording surface, and is aligned in the axial direction. The magnetic head is configured to read and write information from and to the plurality of recording media. The plurality of first blades forms a spoiler, and the first blades of the plurality are located in a plurality of gaps provided between the plurality of recording media. The housing is provided with an inner chamber in which the plurality of recording media, the plurality of magnetic heads, and the plurality of first blades are accommodated. The number of first blades is smaller than the number of gaps.

A hard disk holder includes an integrated sheet metal framework. The integrated sheet metal framework is a main body structure of the hard disk holder, and a head and a tail of the integrated sheet metal framework are clamped to form a closed framework. The integrated sheet metal framework specifically includes a first side plate, a head end plate, a second side plate, and a tail end plate that are formed by sheet metal and are disposed in sequence. An inner side of the first side plate and an inner side of the second side plate each have a limiting bulge, and the hard disk body has limiting holes. The limiting bulges adapt to the limiting holes. When the hard disk body is mounted to the hard disk holder, the limiting bulges extend into the limiting holes to form a limiting structure.

A hard disk holder includes an integrated sheet metal framework. The integrated sheet metal framework is a main body structure of the hard disk holder, and a head and a tail of the integrated sheet metal framework are clamped to form a closed framework. The integrated sheet metal framework specifically includes a first side plate, a head end plate, a second side plate, and a tail end plate that are formed by sheet metal and are disposed in sequence. An inner side of the first side plate and an inner side of the second side plate each have a limiting bulge, and the hard disk body has limiting holes. The limiting bulges adapt to the limiting holes. When the hard disk body is mounted to the hard disk holder, the limiting bulges extend into the limiting holes to form a limiting structure.

One feature pertains to an acoustic attenuation device. The acoustic attenuation device comprises a fan assembly, the fan assembly including at least one fan module that directs airflow in at least one direction, wherein the at least one fan module includes a top surface and a bottom surface, a plurality of air deflectors mounted to the top surface and the bottom surface of the at least one fan module, wherein the plurality of air deflectors include a plurality of surfaces, and wherein at least one of the plurality of surfaces is an angled surface that redirects the airflow 90-degrees, and acoustic attenuating foam, wherein the acoustic attenuating foam has a two-dimensional (2-D) surface and is applied to interior surfaces of the plurality of surfaces.

The invention relates to a circuit arrangement, comprising at least one wiring carrier plate (1), characterized by at least one separating element (2) formed in the wiring carrier plate (1), which separating element divides the wiring carrier plate (1) into sections separated by the separating element (2), wherein the transfer of vibrations from one section to another section is at least partially decoupled and/or damped by the separating element (2). The invention further relates to a converter having such a circuit arrangement, and to an aircraft having a converter. The converter can comprise capacitor stacks (3) arranged on the wiring carrier plate (1), and power semiconductors (6).

The invention relates to a circuit arrangement, comprising at least one wiring carrier plate (1), characterized by at least one separating element (2) formed in the wiring carrier plate (1), which separating element divides the wiring carrier plate (1) into sections separated by the separating element (2), wherein the transfer of vibrations from one section to another section is at least partially decoupled and/or damped by the separating element (2). The invention further relates to a converter having such a circuit arrangement, and to an aircraft having a converter. The converter can comprise capacitor stacks (3) arranged on the wiring carrier plate (1), and power semiconductors (6).

Acoustic dampeners, methods of making acoustic dampener, and uses thereof are described. The acoustic dampener includes a polymer foam article; and a metal-organic framework portion. The metal-organic framework portion comprises a metal-organic framework in a polymer matrix. The metal-organic framework portion is adhered to, or otherwise coupled to or included with, the polymer foam article. Such an acoustic dampener can be used in a computer equipment cabinet.

Acoustic dampeners, methods of making acoustic dampener, and uses thereof are described. The acoustic dampener includes a polymer foam article; and a metal-organic framework portion. The metal-organic framework portion comprises a metal-organic framework in a polymer matrix. The metal-organic framework portion is adhered to, or otherwise coupled to or included with, the polymer foam article. Such an acoustic dampener can be used in a computer equipment cabinet.

Examples are disclosed that relate to attenuating fan noise in a computing storage system comprising magnetic data storage devices. One example provides a computing storage system comprising an enclosure, a plurality of magnetic data storage devices positioned within the enclosure, one or more fans positioned to cool the magnetic data storage devices, and an acoustic attenuator located between the plurality of magnetic data storage devices and the one or more fans. The acoustic attenuator comprises a plurality of airflow channels each defined by one or more internal walls of the acoustic attenuator, wherein at least one of the plurality of airflow channels is configured to block a line of sight between the plurality of magnetic data storage devices and the one or more fans.

A disk device includes one or more disks, a base shaft, a bearing shaft, first and second bearing units, first and second actuator assemblies, and a damping member. The bearing shaft has a tubular portion fixed around the base shaft. The first and second bearing units are attached around the bearing shaft and aligned in an axial direction of the bearing shaft. The first and second actuator assemblies are coupled to the first and second bearing units, respectively. The damping member is provided between an outer circumferential surface of the base shaft and an inner circumferential surface of the tubular portion of the bearing shaft.