If you or someone you love is deaf or hard of hearing, a standard smoke alarm simply isn\'t enough. The good news: today\'s hearing impaired smoke alarms use powerful vibration, intense strobe lighting, and smart connectivity to deliver life-saving alerts, even in deep sleep. Here\'s everything you need to know to choose the right system. Most smoke alarms rely entirely on a loud audible siren, typically 85 decibels or more. For people with mild-to-moderate hearing loss, that sound may be muffled or missed entirely, especially at night when hearing aids are removed. For those who are profoundly deaf, a standard alarm is effectively silent.