Abstract: A cooling duct connects a passenger compartment of a vehicle and an energy storage system in fluid communication, and directs a flow of air from the passenger compartment to the energy storage system to cool the energy storage system. The cooling duct includes a first portion that is formed from a non-porous material, and a second portion that is formed from a porous material. The first portion and the second portion are attached to define an enclosed flow path. The second portion includes an airflow resistivity that allows air infiltration into the second portion, through the porous material, at a rate of between zero percent (0%) and twenty percent (20%) of a minimum flow rate when an inlet of the cooling duct is unobstructed, and at a rate of at least thirty percent (30%) when the inlet is completely obstructed.

Abstract: A vehicle has an electric drive mode, a body defining a vehicle interior, a first and second set of audio speakers positioned outside and inside of the interior, respectively, and a controller. The controller generates an acoustic signal, broadcasts the acoustic signal via the first set of speakers during an electric drive mode, and generates and broadcasts a cancelling signal via the second set of speakers. The broadcasts are coordinated to substantially cancel an attenuated portion of the acoustic signal resulting from propagation of the acoustic signal into the interior. A method cancels a synthesized sound within a vehicle interior by collecting vehicle operating values, generating an acoustic signal as the synthesized sound during an electric drive mode, and processing the acoustic signal to generate a modified acoustic signal approximating an attenuated portion of the acoustic signal propagating into the vehicle interior.

Abstract: A vehicle has an electric drive mode, a body defining a vehicle interior, a first and second set of audio speakers positioned outside and inside of the interior, respectively, and a controller. The controller generates an acoustic signal, broadcasts the acoustic signal via the first set of speakers during an electric drive mode, and generates and broadcasts a cancelling signal via the second set of speakers. The broadcasts are coordinated to substantially cancel an attenuated portion of the acoustic signal resulting from propagation of the acoustic signal into the interior. A method cancels a synthesized sound within a vehicle interior by collecting vehicle operating values, generating an acoustic signal as the synthesized sound during an electric drive mode, and processing the acoustic signal to generate a modified acoustic signal approximating an attenuated portion of the acoustic signal propagating into the vehicle interior.