SOUNDING-BODY DRIVING CIRCUIT AND OPERATING SOUND GENERATING APPARATUS USING THE SAME

Upon receipt of a direction indication control signal s 11 , a sounding-body driving circuit 12 generates a driving signal s 16 for generating a flashing operation sound which is an artificial striking sound similar to a striking sound of a mechanical relay and outputs the driving signal s 16 to a speaker 16 via an amplifier 14 , and the flashing operation sound is outputted from the speaker 16 , thereby obtaining the flashing operation sound which does not sound unusual to the driver. The sounding-body driving circuit 12 has a construction such that a plurality of rectangular wave signals having the same amplitude and different frequencies are synthesized in sequence of time by first and second synthetic signal generating circuits 20 A and 20 B to thus generate first and second synthetic signals s 14 and s 15 as artificial striking sounds, and the signals s 14 and s 15 are alternately outputted as driving signals s 16 from a synthetic signal output circuit 22 at intervals of a predetermined time. The flashing operation sound is thus obtained with a simple and inexpensive construction.