Fire alarm sirens must be designed to be heard by adults sleeping deep, in order to keep residents safe around the clock. That is why alarms emit sound at a min. level of 85 decibels from 1 metres away.

A fire alarm sounder is an essential safety device that is designed to alert occupants of a building in the event of a fire or other emergency. It is an audible part of a fire alarm system, and its primary function is to produce a loud sound to warn people to evacuate the building.

DSW also provides alarm sounders, also known as sounder beacons and alarm strobes, which are key components in any commercial or residential security or fire alarm system.