System for influencing exhaust noise, engine noise and/or intake noise

摘要

A system (7), for influencing noises of a vehicle, includes a controller (9) and at least one connected loudspeaker (2) that generates noise inside a sound generator (3) in response to a control signal. The controller includes a microprocessor (91; 91′), a digital-to-analog converter (92), an amplifier (93), and a step-up converter (97). The microprocessor generates a digital control signal, to generate a noise to cancel noise inside an exhaust system and/or an intake system and/or to generate a noise inside an engine compartment. The digital control signal is converted by the digital-to-analog converter into an analog control signal. The amplifier amplifies the analog control signal output from the digital-to-analog converter. The step-up converter is connected to an automobile battery (10) of the vehicle and converts a battery voltage (VBATT) supplied by the automobile battery to a constant value, with this output as a supply voltage (VB) to the amplifier.