SIGNAL SOUND GENERATING METHOD AND ITS DEVICE FOR CAR BURGLAR ALARMING SYSTEM

摘要

PURPOSE: A signal sound generating method and its device generate unique alarming sound to let a driver know that the alarming car is his/hers. CONSTITUTION: A signal sound generating device(300) is installed between a car burglar alarm(100) and a siren(200) and comprises a control part(301), a frequency driving and amplifying circuit(303) and an oscillating part(302). The control part(301) receives, compares and judges a trigger signal from the car burglar alarm(100) and executes generation and conversion of frequency. The frequency driving and amplifying circuit(303) which is a push-pull circuit receives signal output from the control part(301) and generates different signal sound(coded and informationalized unique siren sound or soft and long condition sound). The oscillating part(302) generates oscillating output to drive the control part(301)