Database of sensory characteristics of older persons and persons with disabilities

How to design easily heard auditory signals

Adjust the sound level of auditory signals to make them audible even in noisy conditions.

Examine the audibility of signals that were designed or which are to be designed.

Do you know how the audibility of spoken announcements can differ depending on the sound level?

		Too soft	Moderate	Too loud
Listener aged 20	Male speaker
	Female speaker
Listener aged 70	Male speaker
	Female speaker

Audibility of spoken announcements can change in noisy conditions.

Speech recognition scores in noisy conditions differ depending on the listener's hearing ability.