| 摘要 |
The device according to the invention comprises at least one selective proximity detector (5), at least one voice message generator (7), and an electronic counting circuit (9) for counting and displaying the messages sent out. The assembly is included in a box (4) placed in proximity to an area to be monitored, for example in front of a supermarket stand. The device thus makes it possible to generate specific messages when a person passes, and then to process the messages sent out statistically. <IMAGE>
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