How well does the Lifetone HL Bedside Fire Alarm and Clock work?
The 520 Hz square-wave sound, used in the Lifetone HL Bedside Fire Alarm and Clock, has been proven much more effective at waking sleeping individuals with mild to moderately severe hearing loss than conventional smoke alarms. In fact, 95% of the hard of hearing participants in this independent study were awakened by the 85 dB (at the pillow) 520 Hz square-wave sound. It was by far the most effective alarm signal in the study, which also compared the waking effectiveness of strobe lights, bed shakers, pillow shakers, and the 3100 Hz signal emitted by traditional smoke alarms (Waking Effectiveness of Alarms (auditory, visual, tactile) for adults who are hard of hearing). The Lifetone HL Bedside Fire Alarm and Clock has received positive reviews from industry experts and consumers. For a full list of reviews visit our testimonial page.
