Patent ID: 9407225
Filing Date: 2016-08-02
CPC Classification: B60Q,F02M,H03G

Claim Text:
1. A sound enhancing system adapted for use with an engine of a vehicle to audibly amplify engine sounds produced by the engine over a predetermined engine RPM operating range, the sound enhancing system including: a sound enhancing component coupled to structure of the vehicle such that the sound enhancing component is fixed against movement, relative to the engine, the sound enhancing component configured to receive a flow of a portion of air, in a form of air pulsations, which are being ingested by an induction system of the engine; a tubular inlet duct configured to lengthen and shorten in response to a roll of the engine as the RPM of the engine, or a load experienced by the engine, changes, the tubular inlet duct being in communication with an inlet port of the sound enhancing component and with a component of the vehicle's induction system, and thus being responsive to the roll of the engine; an outlet duct coupled to an outlet port of the sound enhancing component for channeling sound from the sound enhancing component into or adjacent to a passenger compartment of the vehicle; and wherein the change in length of the tubular inlet duct resulting from roll of the engine, which is in response to a change in engine RPM or load experienced by the engine, enables a frequency response of the sound enhancing component to be controlled in accordance with the RPM of the engine.