The NHS is turning to 'coughing' bus shelters to stress the importance of detecting lung cancer early.
The looped coughing sounds have been produced by Clear Channel's Create team and created by Sixteen Hands, will be heard in shelters in Hertfordshire and Cumbria.
The noises will be accompanied by posters stressing the importance of visiting a GP if coughing persists for three weeks or more. They also promote the 3weekcough.org website.
Neil Chapman, group head of Create at Clear Channel UK, said: "We wanted to create an innovative campaign to catch people’s attention and encourage them to go online to find out more. People waiting for a bus don’t expect to hear sound coming from the 6 sheet poster, so when it does it causes much interest.
"This type of campaign always creates a word-of-mouth viral effect in the local area, which will be important to amplify the message and encourage people to be more aware of the symptoms.”
The six sites in Hertrfordshire and four in Cumbria have been booked by Posterscope and Alchemy Media.