The present invention enlarges the principle of sound derived through a projection facility on a road surface to generate a chord. (#, B) by expanding the existing monohull ratio (degrees, lairs, mi, waves, soles, l, poems) And harmonies through both wheels. This allows us to feel the tempo, and it can contribute to safe driving and accident prevention, including both pitch (f) and pitch (p) The invention relates to a sound source generating apparatus and a construction method thereof.
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