US 8,005,235 B2 · Multi-chamber noise control system

Abstract

A noise control system is operable within a box-like structure provided by the dual bulkhead plenum of the vehicle dashboard positioned within the transfer path along which the noise is being transmitted from the source of the generated noise to the receiver of the noise in the passenger compartment of an automobile. The plenum is divided into discrete chambers into each of which is provided a counter noise generating apparatus to create a counteracting noise offsetting the noise generated at the source. The acoustic resonance of the chambers amplifies the noise control energy. The geometry of the individual chambers can be varied to optimize the packaging and sound control or shaping strategy. The sound energy permitted to pass through the plenum to the driver's side of the passenger compartment can be tuned to be different than the noise received in the passenger's side.

Claims20

Dependent claims

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 along a transfer path into said passenger compartment;
a transverse closed box-like structure interposed between said engine compartment and said passenger compartment and having a transverse width sufficient to intercept the noise energy being transmitted from said engine to said passenger compartment along said transfer path, said box-like structure being divided into a plurality of discrete chambers by internal longitudinally extending walls;
and
a noise control system placed within each said chamber of said box-like structure to control the transfer of said noise energy into said passenger compartment, said noise control system including a counteracting noise generating apparatus disposed within each said chamber and being operable to produce counteracting noise energy for the generated noise energy, each said noise control system corresponding to the respective chambers of said box-like structure being operable independently of each other respective noise control system to permit at least two of said chambers to produce different results with respect to the transmission of generated noise energy.

2 more elements

A noise control system operable with a noise generating apparatus producing generated noise energy and a receiver located remotely from said noise generating apparatus to receive said generated noise energy, comprising:

a box-like structure located along a transfer path of said generated noise energy extending between said noise generating apparatus and said receiver, said box-like structure being located between said noise generating apparatus and said receiver and being divided into transversely spaced chambers by internal walls;
a counter energy generating apparatus positioned in each respective chamber to create counter noise energy to counteract said generated noise energy, each said counter energy generating apparatus being operable independently of each other respective counter energy generating apparatus to permit at least two of said chambers to produce different results with respect to the transmission of generated noise energy.

Dependencies are inferred from the claim text.

Multi-chamber noise control system

Life of this patent

Multi-chamber noise control system

Life of this patent

Abstract

Claims20