A luminaire including an acoustic base,a lens in the acoustic base, and at least one light emitting device above the lens.

The described embodiments relate generally to a micro-perforated panel systems and methods for noise abatement and method of making a micro-perforated panel system. In particular, embodiments relate to glass micro-perforated panel systems and methods for their construction.

The present invention aims to provide a sound-absorbing material having sound absorption performance with an average sound absorption coefficient of 0.65 or more in the frequency domain of 800 to 2000 Hz. The present invention relates to a sound-absorbing material including: a fiber layer including a plurality of holes open to a surface thereof and having a thickness of 3 mm or more; and an inorganic material layer formed on the surface of the fiber layer, the holes being blind holes each penetrating through the inorganic material layer and having a bottom inside the fiber layer.

A ventilated seat system for a vehicle includes a seating assembly including a seatback operably coupled to a seat base. A blower is coupled to the seating assembly. The blower generates a sound transmission when activated. The blower includes a housing defining an inlet and an outlet. A first metamaterial silencer is coupled to an interior surface of the housing proximate to the inlet, and a second metamaterial silencer is coupled to the interior surface of the housing proximate to the outlet. Each of the first metamaterial silencer and the second metamaterial silencer reduces the sound transmission generated by the blower.

A support system for a basket filled with a filler material for creating a privacy or noise protection barrier includes first support elements arranged in side-by-side spaced-apart relationship, second support elements arranged in opposition to the first support elements, and horizontal cross ties interconnecting the first and second support elements on their insides at a distance from one another. Mesh mats are further provided to interconnect the first and second support elements in a longitudinal direction of the support system on their outsides.

A center plug for attenuating noise in a gas turbine engine includes an inner skin, the inner skin having a substantially cylindrical shape and extending along an axial centerline; an outer skin positioned radially outside the inner skin; a forward bulkhead disposed proximate a forward end of the inner skin, the forward bulkhead connected to and extending radially outward from the inner skin; an aft bulkhead disposed proximate an aft end of the inner skin, the aft bulkhead connected to and extending radially outward from the inner skin; and a first resonator cavity disposed within a volume defined by the inner skin, the outer skin and the forward bulkhead and the aft bulkhead, the first resonator cavity including a first perforated disk extending between the inner skin and the outer skin and forming a first sub-cavity and a second sub-cavity.

A center plug for attenuating noise in a gas turbine engine includes an inner skin, the inner skin having a substantially cylindrical shape and extending along an axial centerline; an outer skin positioned radially outside the inner skin; a forward bulkhead disposed proximate a forward end of the inner skin, the forward bulkhead connected to and extending radially outward from the inner skin; an aft bulkhead disposed proximate an aft end of the inner skin, the aft bulkhead connected to and extending radially outward from the inner skin; and a first resonator cavity disposed within a volume defined by the inner skin, the outer skin and the forward bulkhead and the aft bulkhead, the first resonator cavity including a first perforated disk extending between the inner skin and the outer skin and forming a first sub-cavity and a second sub-cavity.

A broadband sparse acoustic reflector includes a periodic array of laterally spaced apart unit cells, each unit cell having a plurality of longitudinally positioned Helmholtz resonators. Each unit cell includes a Helmholtz resonator having a neck that places the resonator interior in fluid communication with an ambient fluid, in the lateral direction. Each Helmholtz resonator of the unit cell has a different resonance frequency, providing broadband reflection.

A sound attenuating baffle device has a baffle casing supported within a duct such that a boundary wall of the baffle device is oriented in the flow direction from the leading end to the trailing end of the baffle casing. The baffle casing includes a sound attenuating structure therein, and a trailing member protruding outwardly beyond the trailing end of the baffle casing towards a free trailing edge of the trailing member which is non-linear in profile. As compared to a continuous, straight trailing edge as found on most silencer outlets, a non-linear profile, for example a V-shaped or saw-toothed edge, improves the flow distribution along the height of the baffle or perimeter of the centerbody. The distribution of airflow across the resulting extended tail edge represents an improvement in the flow recovery.

A sound attenuating baffle device has a baffle casing supported within a duct such that a boundary wall of the baffle device is oriented in the flow direction from the leading end to the trailing end of the baffle casing. The baffle casing includes a sound attenuating structure therein, and a trailing member protruding outwardly beyond the trailing end of the baffle casing towards a free trailing edge of the trailing member which is non-linear in profile. As compared to a continuous, straight trailing edge as found on most silencer outlets, a non-linear profile, for example a V-shaped or saw-toothed edge, improves the flow distribution along the height of the baffle or perimeter of the centerbody. The distribution of airflow across the resulting extended tail edge represents an improvement in the flow recovery.