Fire Risks and Alarm Technologies for Those with Sensory Disabilities

Fire safety is a universal concern, but the risks and response challenges faced by people with sensory disabilities, particularly those who are blind and/or deaf, are unique. The cues that non-disabled people  rely on to detect and respond to a fire are visual – seeing smoke, flames or flashing lights, or audible – hearing fire alarms and occupant warning systems. For those who can’t depend on these senses, early detection and safe evacuation can be far more difficult.

The Growing Need for Inclusive Fire Safety

The population affected by sensory disabilities is significant and increasing.

In Australia, about 3.6 million people have some level of hearing loss and this number is expected to double to an estimated 7.8 million people in 2060. Hearing loss increases from about 50% of those aged 60-70, to 70% of those aged 70 and over, and 80% of those aged 80 and over.

It is estimated that over 13 million Australians have one or more chronic (long-term) eye conditions, according to self-reported data from the Australian Bureau of Statistics 2017–18. Chronic eye conditions affected 93% of people aged 65 and over.

This growing demographic highlights the need for fire safety systems that are inclusive, reliable, and effective for everyone.

Risks for People Who Are Deaf or Hard of Hearing

For people with hearing loss, the greatest danger is simply not knowing that a fire has started at all. Standard audible fire alarms emit high-frequency tones, typically between 3,000 and 5,000 hertz, which are ineffective for many people with partial or profound hearing loss. This is particularly critical during the night, when even people with mild hearing loss may remove hearing aids to sleep and be completely unaware of the alarm.

Many fatal residential fires occur during sleeping hours. People mistakenly think that they would wake up to the smell of a fire, however, a study from Brown University in 2004 concluded that typically, smell will not wake someone during deep sleep stages. For a person who is deaf or hard of hearing, there may be no warning until the heat of the fire reaches them—often far too late to escape safely.

Even when awake, important safety announcements, such as instructions not to use a lift or to follow a particular exit route, can be missed if they are delivered solely through public address systems. The delay in receiving this information can increase evacuation time and heighten the risk of harm.

Risks for People Who Are Blind or Visually Impaired

For people who cannot rely on sight, detecting a fire in its early stages is also difficult. Everyday tasks such as cooking or using heaters can pose higher risks as visual checks that might prevent a fire, like noticing a pot boiling dry or a heater placed too close to curtains, are not possible. This can result in accidental ignition and relayed detection. The smell of smoke or the sensation of heat are cues that appear later in the fire’s development, reducing the available time to escape.

Once a fire starts, navigating to safety can be challenging, especially in unfamiliar buildings. The sensory cues that visually impaired or blind individuals depend on can become overwhelmed and high-decibel smoke alarms can make it difficult for them to process audible clues and instructions effectively.

People who have recently lost their sight, may face additional risks, as they may not have developed strategies for interpreting sound and touch in an emergency, in order to navigate safely.

Alternative Alarm Technologies and their Effectiveness

Alternative alarm technologies can be divided into 4 categories: audible, olfactory, tactile and visual. They have varying levels of effectiveness for different types of people.

A study from the Victoria University in 2008, found that 75% of the sleeping participants, who had either hearing loss of 25-70 dBA in both ears, or were impaired with alcohol at 0.05 blood alcohol, slept through the activated strobe light.

A study from the Lund University in 2022, found that low-frequency alarms, bed shakers and/or pillow shakers to be the most reliable way to wake deaf or hard of hearing people from sleep. However, the Victoria University study found that pillow and bed shakers did not wake 17-20% of the hard of hearing participants at the intensity level as purchased. Hard of hearing participants aged ≥60 years were less likely to wake up to the bed shaker than those aged <60 years.  The 520 Hz square wave sound was (low-frequency alarm) more effective than the non-auditory signals for both groups.

Environment and Personal Safety

Fire safety relies on both environmental design and personal preparedness. The safest environments are those that use a layered approach, combining multiple types of alerts.

In workplaces or public buildings, accessible evacuation routes, tactile and high-contrast exit signage, and multi-sensory alarm systems should be part of the building’s fire safety plan. Smoke detectors should ideally be paired with clear, intelligible voice messages that provide specific evacuation instructions, rather than relying solely on a repetitive tone.

At home, interconnected alarms can be installed so that when one detects smoke, all audio, visual, and tactile alerts are triggered at once. There are portable personal alerting system products on the market that consist of a combination of strobe light, bed shaker and connected smoke alarm.

Daily habits are another line of defence. Setting timers while cooking, using safe heating equipment, and avoiding open flames can all reduce the likelihood of a fire starting in the first place.

Legal Case Study

Christina Knorr was engaged as an expert witness in a legal case regarding funding for an alternative alarm system. The applicant in the case was profoundly deaf and seeking funding for a hardwired notification system to alert her if her smoke alarm was triggered.

The applicant had been recommended to have a strobe light and vibration pad placed at their bedside table to alert her when sleeping. However, these measures would be insufficient to alert her in any other situation, for example having a shower or falling asleep in the living room. The Court found in favour of the applicant.

Conclusion

For those with sensory disabilities, fire safety depends on more than just having a smoke alarm, it requires a warning that can be detected and understood, and a plan that can be executed quickly.

Practising escape plans and safe behavioural precautions are critical as technology alone cannot eliminate the risks. The right combination of inclusive technology, accessible design and proactive preparation can make the critical difference between escape and tragedy.

Enhancing fire safety for those with sensory disabilities depends on:

• Continued research into emerging technologies and smart integrated systems.
• Updates to building codes and standards.
• Public education campaigns to build awareness and preparedness.

By combining these efforts, we move closer to ensuring fire safety for everyone.

Sources:
https://www.health.gov.au/topics/ear-health/about
https://www.aihw.gov.au/reports/eye-health/eye-health/contents/about
https://www.preventionweb.net/files/8579_firerisksfortheblind.pdf
https://vuir.vu.edu.au/1685/1/strobe_lights.pdf
https://pubmed.ncbi.nlm.nih.gov/15164891/
https://link.springer.com/article/10.1007/s10694-022-01265-8
https://www.visionaustralia.org