LOUD & RELIABLE – 115 Decibels! How loud are 115 decibels? Well in comparison, an Ambulance Siren rates at 100 decibels (inside the ambulance, driver window down), a Chainsaw is 110 decibels. That's LOUD! Our engineers were careful to make our personal alarms loud enough it can attract attention & discourage an attacker, but not to damage your hearing. Reliability was also a priority for the women's personal alarm. Our alarm is made to last, be easily accessible & ready when needed.