beep

The high-pitched electronic beep is usually only heard during foggy conditions, most clearly at Land's End, and also by residents of places around the coast including Sennen and Cape Cornwall.

Whether it's the echo of beeping tills in a supermarket or the hissing of a coffee machine in your local café, the brain is constantly working to decode hundreds of noises each day.

There is a constant beeping sound as we are led through the building.

There will be many more groups with placards beeping their horns outside airports and in the Fens, if this agenda is actually delivered.

He also recalled an incident where the "beep" of a timer was used to signal that one attack was to stop and another to start.