REGURATING SOUND GENERATING SYSTEM FOR ENVIRONMENT FRIENDLY VEHICLE AND A METHOD FOR CONTROLLING THE SYSTEM

摘要

An environmentally-friendly vehicle sound generator control apparatus. The apparatus includes a sound playback unit including a sound comparison unit for comparing a frequency band-specific reference sound level data with an extracted plurality of frequency band-specific sound data for each frequency band in response to a comparison control signal of a control unit, a sound control unit for controlling a pitch or a volume of a plurality of frequency band-specific sample sound source data to form a plurality of frequency band-specific sample control sound source data if the extracted plurality of frequency band-specific sound data is smaller than the frequency band-specific reference sound level data, and a sound mixing unit for mixing the plurality of frequency band-specific sample control sound source data and transferring the mixed plurality of frequency band-specific sample control sound source data to the sound output unit so that a pedestrian's vehicle recognition sound can be outputted.

主权项

1. An environmentally-friendly vehicle sound generator control apparatus comprising:
a storage unit including a sound source storage unit for storing a plurality of frequency band-specific sample sound source data of a real single engine sound of an internal combustion engine vehicle, and a reference data storage unit for storing frequency band-specific reference sound level data; a sound output unit arranged in an environmentally-friendly vehicle to output a pedestrian's vehicle recognition sound; a sound sensing unit arranged to be spaced apart from the sound output unit to sense the pedestrian's vehicle recognition sound output from the sound output unit; a sound source sound extraction unit for extracting and dividing the pedestrian's vehicle recognition sound sensed by the sound sensing unit for each of a plurality of frequency bands; a control unit for storing the frequency band-specific sound data of the pedestrian's vehicle recognition sound extracted and divided by the sound source sound extraction unit in a sound storage unit of the storage unit; and a sound playback unit including a sound comparison unit for comparing the frequency band-specific reference sound level data with the extracted plurality of frequency band-specific sound data for each frequency band in response to a comparison control signal of the control unit, a sound control unit for controlling the pitch or the volume of the plurality of frequency band-specific sample sound source data to form a plurality of frequency band-specific sample control sound source data if the extracted plurality of frequency band-specific sound data is smaller than the frequency band-specific reference sound level data, and a sound mixing unit for mixing the plurality of frequency band-specific sample control sound source data and transferring the mixed plurality of frequency band-specific sample control sound source data to the sound output unit so that the sound output unit can output the pedestrian's vehicle recognition sound.