One team at the JCT LevTech women’s hackathon developed an electronic bracelet alarm for the hard of hearing. It vibrates when it detects a rocket siren and thus alerts the wearer to the need to get to a bomb shelter. It can even differentiate from other alarms or similar sounds.
https://unitedwithisrael.org/israeli-women-hackers-invent-rocket-alert-for-hearing-impaired/