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Vortex muffler
A muffler includes an inner passage residing in an outer shell, and a stationary fan residing in the inner passage. The fan creates a vortex in a flow through the inner passage thus improving the flow and reducing the exhaust sound level. The inner passage includes an inner passage shell and the fan comprises vanes extending inward from the inner passage shell and turned at approximately a 45 degree angle to a centerline of the inner passage. Pinch zones at the entrance and exit from the inner passage further reduce the exhaust sound level. The inner passage shell is preferably a perforated inner passage shell, and a sound deadening material resides between perforated inner passage shell and the outer shell.
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| Vortex+muffler |
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Combustion chamber for a gas turbine
At least one Helmholtz damper is arranged at a combustion chamber for a gas turbine in order to damp thermoacoustic oscillations; the damping volume of this Helmholtz damper is in communication with the combustion chamber via a connecting passage. Optimum damping is achieved in a simple way by virtue of the Helmholtz damper being designed in such a manner that its damping frequency is adjustable.
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| Combustion+chamber+for+a+gas+turbine |
Arbitrary coverage angle sound integrator
A system is disclosed for changing a coverage angle of sound produced from a loudspeaker system. The loudspeaker system includes an enclosure that projects sound at a predetermined angle. A sound integrator includes an inner surface positioned adjacent to a mid-range frequency sound source. An outer surface of the sound integrator includes a planar and a curved surface. The surfaces control the angle which sound radiates from the loudspeaker.
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| Arbitrary+coverage+angle+sound+integrator |
Frame for speaker device and speaker device
A frame for a speaker device includes a magnetic circuit housing unit which houses a magnetic circuit, a substantially annular outer peripheral portion which is arranged on an outer side of the magnetic circuit housing unit, and plural arm portions which connect the magnetic circuit housing unit and the outer peripheral portion. Each of the plural arm portions has a sectional shape of a one-open-end shape having a connected end and an open end, and the plural arm portions include an arm portion having the open end oriented to one direction and an arm portion having the open end oriented to a direction opposite to the one direction.
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| Frame+for+speaker+device+and+speaker+device |
Flow restrictors for aircraft inlet acoustic treatments, and associated systems and methods
Flow restrictors for aircraft inlet acoustic cores, and associated systems and methods are disclosed. A system in accordance with one embodiment of the invention includes an inlet flow surface having multiple openings, and an acoustic treatment positioned adjacent to the inlet flow surface. The acoustic treatment can have multiple cells in fluid communication with the openings in the inlet flow surface. A fluid collector passage can be positioned to collect liquid entering the acoustic treatment through the multiple openings, and can have an exit aperture through which the liquid drains. The fluid collector passage can include at least one flow restrictor positioned to at least restrict the flow of air from the exit aperture through the fluid collector passage to the multiple openings.
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| Flow+restrictors+for+aircraft+inlet+acoustic+treatments,+and+associated+systems+and+methods |
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