How does a deaf person know when a baby is crying?

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Tags

1. #people
2. #pagers
3. #appearance
4. #cries
5. #provide
6. #monitors
7. #parents
8. #service
9. #vibration
10. #lights
11. #alert
12. #specially
13. #trained
14. #technology
15. #notice
16. #special
17. #crying
18. #attention