In cooperation with the Tel Aviv Municipality, NGO CODA (Children of Deaf Adults) has imported customized smart watches that vibrate whenever a siren goes off. They have been delivered to 300 deaf Israelis. CODA was co-founded by Israeli Shani Bibi, a child of hearing-impaired parents.
https://www.jns.org/israeli-startups-step-in-to-fill-wartime-gaps/