What type of device is specifically designed for use by hearing impaired persons?

A flashing alarm is specifically designed for use by hearing-impaired individuals because it employs bright, flashing lights to alert users to emergencies instead of sound. Since traditional alarms rely on audible signals, they would be ineffective for someone who cannot hear them. Flashing alarms ensure that those with hearing impairments have an effective means of receiving crucial safety alerts, such as fire alarms or emergency notifications.

While smoke detectors and carbon monoxide detectors are essential safety devices, they generally emit sound alerts, which would not benefit hearing-impaired users. Fire alarms, similar to standard smoke detectors, primarily use audible signals. Therefore, the flashing alarm is the most appropriate device that meets the needs of individuals with hearing disabilities.