Indirect acoustic transfer control of noise
First Claim
1. An automotive vehicle, comprising:
- a chassis defining an engine compartment and a longitudinally spaced passenger compartment;
an engine mounted in said engine compartment and being operable to generate noise energy;
a transverse dual bulkhead plenum located at a forward position in said passenger compartment and being interposed between said engine compartment and said passenger compartment within the transfer path of the noise energy being transmitted from said engine to said passenger compartment so that the noise energy passes through the plenum to reach the passenger compartment; and
a noise control system placed within said plenum to control the transfer of said noise energy through said plenum into said passenger compartment, wherein said noise control system includes sensors supported on said vehicle to sense operational conditions relating to said engine, said noise control system further including a device mounted in said plenum to generate counter noise to counteract said noise energy.
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Accused Products
Abstract
A noise control system is directed to the path along which the noise is transmitted from the source of the noise being generated to the receiver of the noise in the passenger compartment of an automotive vehicle. The noise control system is deployed in a box structure, such as the dual bulkhead of the dashboard of the vehicle, to provide a constrained volume within which engine noise can be controlled. The dual bulkhead plenum houses an active noise control apparatus, such as a speaker or a vibrating device, between the bulkheads to be operable with a control algorithm to generate sound that can control the noise or vibrations generated by the engine. The plenum can also be treated with passive noise control materials, such as viscoelastic damping materials, acoustical foam or heavy vinyl barrier and foam to block airborne sound and vibrations, in addition to the active noise control.
20 Citations
17 Claims
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1. An automotive vehicle, comprising:
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a chassis defining an engine compartment and a longitudinally spaced passenger compartment; an engine mounted in said engine compartment and being operable to generate noise energy; a transverse dual bulkhead plenum located at a forward position in said passenger compartment and being interposed between said engine compartment and said passenger compartment within the transfer path of the noise energy being transmitted from said engine to said passenger compartment so that the noise energy passes through the plenum to reach the passenger compartment; and a noise control system placed within said plenum to control the transfer of said noise energy through said plenum into said passenger compartment, wherein said noise control system includes sensors supported on said vehicle to sense operational conditions relating to said engine, said noise control system further including a device mounted in said plenum to generate counter noise to counteract said noise energy. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A noise control system operable with a noise generating apparatus producing noise energy and a compartment for containing a person located remotely from the noise generating apparatus to receive said noise energy, comprising:
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a box-like plenum located along a transfer path extending longitudinally between said noise generating apparatus and said compartment such that said noise energy passes through said plenum to reach said compartment; a counter energy generating device mounted within said box-like plenum; at least one sensor to sense operational parameters of said noise energy; and a controller operable to receive a signal from said at least one sensor, develop a noise control signal and send said noise control signal to said at least one counter energy generating device to create a counter noise energy to provide cancellation of said noise energy within said box-like plenum so that noise energy reaching the compartment is reduced. - View Dependent Claims (9, 10, 11, 12)
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13. A method of controlling a transmission of noise energy from a noise generating apparatus producing generated noise energy and a compartment for containing a person positioned to receive said generated noise energy, comprising the steps of:
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intercepting said generated noise energy by a plenum positioned along a transfer path extending longitudinally between said noise generating apparatus and said compartment; mounting a counter energy generating device along said transfer path within said plenum; creating a counter noise energy by said counter energy generating device positioned within said plenum to counteract said generated noise energy along said transfer path before reaching said compartment. - View Dependent Claims (14, 15, 16, 17)
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Specification