Another way to make auditory alarms such as bells and sirens accessible to deaf people is through the use of a vibrating alarm.
A tactile or vibrating alarm is only accessible to whomever is wearing the device that vibrates and which interacts with the alarm system. Therefore, it is more common in public places to use flashing rather than vibrating alarms as a flashing alarm is accessible to all in the immediate environment.
If you would like to know more about this technology, you can contact Word of Mouth Technology
This service is based in Melbourne, but provides options for online ordering.