Police are helping to promote a council led scheme to help people with hearing impairments feel safer in their homes.
The scheme, run by the Derbyshire Handy Van Network, offers people with a hearing impairment or who are aged over 60 the chance to have a specialist door chime fitted.
Derbyshire County Council first started the initiative in May 2010.
The devices can be set to chime on a variety of loudness settings but also have a flashing light which is activated when someone pushes the button on the door.
The householder is also given a vibrating pager, which also flashes, to carry around with them.
For more information on the Derbyshire Handy Van Network visit www.derbyshire.gov.uk or call your local provider on 01298 23970.