A sound suppression apparatus for installation inside a gas transport duct is provided. The sound suppression apparatus comprises a resistive sound-absorbing element (110) and a housing providing a reactive sound-attenuating element (130) communicating with a surrounding of the apparatus via opening in an outer surface of the housing. An outer surface of the sound suppression apparatus comprises an outer surface of the resistive sound-absorbing element and the outer surface of the housing. A gas transport duct comprising the sound suppression apparatus is also provided.

A compressor system includes a first pipe including a first pipe main body that forms a flow path therein and a first flange that projects from the first pipe main body to an outer peripheral side, and a second pipe including a second pipe main body that forms a flow path therein and a second flange that projects from the second pipe main body to an outer peripheral side and faces the first flange, a bellows provided so as to surround an entire circumference between the first flange and the second flange, and an excitation force reducing portion provided to separate the flow path and the bellows in a space between the first flange and the second flange and formed of a stretchable porous material.

Embodiments of the disclosure provide a fluid end with a modular intake manifold for use in a pressurized fluid delivery system having two or more modules. According to one embodiment, an intake manifold for a modular multiplex pump includes a reducer coupled to an intake end of each module of the pump, a tee body coupled to a reduced diameter end of each of the reducers, and a damping material disposed within a volume of the reducer.

Exemplary air amplifiers described herein can utilize a high-pressure stream of gas to accelerate a low-velocity stream of gas to provide a high-velocity, high-volume stream of gas. This high-velocity, high-volume stream of gas can generate unwanted noise as the high-velocity, high-volume stream of gas propagates through the air amplifier. The exemplary air amplifiers described herein can include can passively and/or actively suppress, for example, diminish, re-tune, or even completely cancel, the unwanted noise as the high-velocity, high-volume stream of gas propagates through these exemplary air amplifiers. The exemplary air amplifiers described herein can include one or more absorption materials to passively suppress the unwanted noise generated by the high-velocity, high-volume stream of gas. The exemplary air amplifiers described herein can generate multiple noise suppression waves to actively suppress the unwanted noise generated by the high-velocity, high-volume stream of gas. The multiple noise suppression waves can destructively combine with the unwanted noise generated by the high-velocity, high-volume stream of gas to suppress the unwanted noise.

A soundproofing device; the soundproofing device includes a body and a set of soundproofing sections disposed therein. In some embodiments, a soundproofing system is also disclosed herein and includes a set of soundproofing devices. The soundproofing device and the soundproofing system are useful for easy installation into ductwork of a building to provide substantial soundproofing to the same.

A silencing device, an air purifier, and a method for producing the same are provided. The method includes that: a sound wave spectrum when an air purifier to be silenced performs operations is acquired; a frequency value, which exceeds a sound wave frequency limit for the air purifier, of the sound wave spectrum is calculated; and a silencing device adapted to the air purifier to be silenced is produced according to the frequency value. At least one structural parameter of the silencing device is configured according to the frequency value. The silencing device is configured to reduce a sound with the frequency value exceeding the sound wave frequency limit.

A fluid system can have a water hammer arrestor including a resilient insert having an outer surface. The resilient insert can be operable to dampen a pressure spike in the fluid that exceeds a static pressure range, providing effective water hammer arrestment that without the resilient insert, would have occurred in a flowing fluid with the pressure spike. The static pressure range can be up to about 100 psig.

A pressure fluctuation absorbing structure includes: a perforated member including a plurality of holes for absorbing pressure fluctuation on a surface thereof; and a partition member disposed on the surface of the perforated member and including a partition wall that partitions the plurality of holes in units of a predetermined number of one or more holes, and a space that is formed by the partition wall and corresponds to the predetermined number of one or more holes.

Methods and systems are provided for a flexible support for a vehicle. In one example, the flexible support is formed of a composite material and configured to surround a vehicle component and absorb oscillations generated by the vehicle. The composite material may be a mixture of aluminum particles dispersed in an elastomer matrix.

Provided are conduits for air flow that are capable of reducing noise and related methods. The provided conduits include a first section that is tubular and substantially non-perforated and a second section with at least a portion having a multiplicity of microperforations that provide an average flow resistance of from 50 MKS Rayls to 8000 MKS Rayls therethrough. The second section is either (a) tubular and connected in series with the first section, with an outer surface of the second section being in fluid communication with an outer surface of the conduit, or (b) disposed within the first section.