Apparatus for attenuating a sound level comprising an enclosure having an inlet and an outlet, where an exhaust flow director is positioned within the enclosure and fluidly coupled to the inlet and the outlet. The exhaust flow director comprises a plurality of overlapping vanes that directs the exhaust flow to attenuate the level of the sound produced by the exhaust.

Apparatus for attenuating a sound level comprising an enclosure having an inlet and an outlet, where an exhaust flow director is positioned within the enclosure and fluidly coupled to the inlet and the outlet. The exhaust flow director comprises a plurality of overlapping vanes that directs the exhaust flow to attenuate the level of the sound produced by the exhaust.

A sound absorbing structure includes a vehicle structure having a surface and at least one acoustic scatterer coupled to the surface. The at least one acoustic scatterer has a resonant frequency. The at least one acoustic scatterer has an opening and at least one channel. The at least one channel has a channel open end and a channel terminal end, the channel open end being in fluid communication with the opening. The sound absorbing structure may be configured to absorb sound waves at a certain frequency generated by a noise source. The certain frequency may be substantially similar to the resonant frequency of the at least one acoustic scatterer.

A constant velocity muffler assembly for maximizing the exhaust performance of an internal combustion engine includes a muffler that is fluidly coupled to an exhaust pipe of an internal combustion engine to facilitate exhaust gasses to pass through the muffler. A cylinder is disposed within the muffler and the muffler swells outwardly at a middle of the muffler to accommodate the cylinder. The cylinder is oriented to extend along a flow axis of the muffler with respect to the exhaust gasses. In this way the cylinder is configured to deflect sound waves from the internal combustion engine thereby reducing a noise level of the internal combustion engine.

A constant velocity muffler assembly for maximizing the exhaust performance of an internal combustion engine includes a muffler that is fluidly coupled to an exhaust pipe of an internal combustion engine to facilitate exhaust gasses to pass through the muffler. A cylinder is disposed within the muffler and the muffler swells outwardly at a middle of the muffler to accommodate the cylinder. The cylinder is oriented to extend along a flow axis of the muffler with respect to the exhaust gasses. In this way the cylinder is configured to deflect sound waves from the internal combustion engine thereby reducing a noise level of the internal combustion engine.

A muffler for use with an internal combustion engine is provided. The muffler includes a first tube configured to receive a first exhaust stream. The first tube includes a first inlet portion, a first outlet portion spaced apart from the first inlet portion, and a first intermediate portion extending between the first inlet portion and the first outlet portion. The muffler also includes a second tube configured to receive a second exhaust stream. The second tube includes a second inlet portion, a second outlet portion spaced apart from the second inlet portion, and a second intermediate portion extending between the second inlet portion and the second outlet portion. The first intermediate portion and the second intermediate portion cross each other, are at least partially stacked on each other, and are in fluid communication with each other.

In the present disclosure is proposed a novel sound attenuating element for, at least in part, providing adequate or preferably improved sound attenuating properties without excessively impeding flow while being susceptible to automated or machine assisted manufacturing or for providing the public with a useful alternative. The novel sound attenuating element is formed at least in part by an assembly of a plurality of components which are successively connected to each other, which each exhibit a curved shape, and which form at least one non-planar ruled surface when assembled.

In the present disclosure is proposed a novel sound attenuating element for, at least in part, providing adequate or preferably improved sound attenuating properties without excessively impeding flow while being susceptible to automated or machine assisted manufacturing or for providing the public with a useful alternative. The novel sound attenuating element is formed at least in part by an assembly of a plurality of components which are successively connected to each other, which each exhibit a curved shape, and which form at least one non-planar ruled surface when assembled.

Provided is an exhaust fumes reduction device for an internal combustion engine. The device reduces the generation of exhaust fumes and improves output and fuel efficiency by smoothing the discharge flow of exhaust gas in a state additionally mounted at the end of an exhaust line of an internal combustion engine. The exhaust fumes reduction device includes; a housing pipe connected to the end of the exhaust port to discharge exhaust gas; a vortex pipe mounted inside the housing pipe to increase the speed of the exhaust gas introduced into the housing pipe and discharge the exhaust gas spirally; and an external pipe mounted on the outside of the housing pipe and in communication with the housing pipe to allow the outside air to flow in and to assist the smooth discharge of exhaust gas discharged to the housing pipe.

Apparatus for attenuating a sound level comprising an enclosure having an inlet and an outlet, where an exhaust flow director is positioned within the enclosure and fluidly coupled to the inlet and the outlet. The exhaust flow director comprises a plurality of overlapping vanes that directs the exhaust flow to attenuate the level of the sound produced by the exhaust.