Electronic article surveillance | Wikipedia audio article
Channel: wikipedia tts
Date: 15/01/2019

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Electronic_article_surveillance


00:00:50 1 History
00:01:08 2 Types
00:01:40 2.1 Electro-magnetic systems
00:03:25 2.2 Acousto-magnetic systems
00:05:29 2.3 Radio frequency systems
00:08:29 2.4 Microwave systems
00:09:12 3 Source tagging
00:10:46 4 Tag pollution
00:11:43 5 Discussion
00:11:52 5.1 Occasional versus professional shoplifters
00:14:45 5.2 Tags containing alarms
00:15:20 5.3 Installation costs
00:16:33 5.4 Tag Orientation
00:17:24 5.5 Detaching
00:18:13 5.6 Electro-magnetic activation and deactivation
00:19:08 5.7 Shielding
00:20:46 5.8 Jamming
00:21:50 6 Interference and health issues
00:23:16 7 Patents
00:24:53 8 Effects on theft
00:25:24 9 See also



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SUMMARY
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Electronic article surveillance is a technological method for preventing shoplifting from retail stores, pilferage of books from libraries or removal of properties from office buildings. Special tags are fixed to merchandise or books. These tags are removed or deactivated by the clerks when the item is properly bought or checked out. At the exits of the store, a detection system sounds an alarm or otherwise alerts the staff when it senses active tags. Some stores also have detection systems at the entrance to the restrooms that sound an alarm if someone tries to take unpaid merchandise with them into the restroom. For high-value goods that are to be manipulated by the patrons, wired alarm clips called spider wrap may be used instead of tags.