| 摘要 |
<p>PROBLEM TO BE SOLVED: To reconcile consideration to peripheral residents and validity of a theft prevention, considering peripheral environments and the situation of a theft. SOLUTION: This device is provided with a vibration detection sensor 1 for theft prevention mounted at each portion of a vehicle body, an inclined detection sensor 2, an opening/closing detection sensor 3, a speaker 6 outputting alarm sound and an alarm sound output control part 7 for outputting alarm sound from the speaker 6 based on detection signals from each detection sensor 1, 2, 3. The alarm sound output control part 7 changes sound volume of alarm sound outputted from the speaker 6 according to input states of the detection signals from each detection sensor 1, 2, 3. The alarm sound is is outputted by varying the tone.</p> |
