Sound recognition theft prevention system

A sound recognition theft prevention system comprising:

• a self-sounding theft prevention tag that is attached to an object disposed in a theft warning region and issues a specific alarm when a theft occurs;
• a trigger signal transmission unit that transmits a trigger signal near an entrance of the theft warning region;
• and
• an alarm identification unit that identifies the alarm issued by the self-sounding theft prevention tag,
• the self-sounding theft prevention tag comprising an alarm issuing unit capable of issuing a first alarm and a second alarm as the specific alarm;
• an anomaly detection switch unit that opens or closes an electric circuit in response to a theft;
• a trigger signal reception unit that detects the trigger signal transmitted from the trigger signal transmission unit;
• and a tag control unit that causes the alarm issuing unit to issue the first alarm at activation of the anomaly detection switch unit and causes the alarm issuing unit to issue the second alarm when the trigger signal reception unit detects the trigger signal,
• wherein the alarm identification unit recognizes at least one of the two alarms issued by the self-sounding theft prevention tag and detects occurrence of theft.