The first trial of revolutionary new technology intended to end train horn misery has been hailed a "phenomenal success".

Campaigners said the newly- developed broadband hooters would give people being blasted by ultra-loud train horns peace and quiet.

The Rail Standards and Safety Board (RSSB), which conducted the trial, said the test had proved it could be possible to fit quieter horns with a softer, less jarring noise.

But the RSSB stressed more tests would be needed before deciding whether to fit trains with them.

The prototype horn used in the trial was clearly audible 400 metres ahead of a train but could hardly be heard 200 metres to the side.

The Brighton-based Noise Abatement Society has been urging rail chiefs fit to broadband horns, claiming the warning would be loud enough to meet industry safety standards without blasting people who live near railway lines.

Director Peter Wakeham said: "The trial was a phenomenal success. It not only meets the railway standard but also what members of the public want, which is peace and quiet."

Campaigner Ella Dzelzainis, who lives near the railway line at Highdown Road, Hove, said: "I think broadband is the way forward, it is obviously safe to live next to and it seems to be safe to work with."

RSSB head of technical services Alan Lawton said: "We are encouraged by these early tests, which show that it may be possible to fit horns with less impact on our neighbours.

"There is still much to be done but these early indications are most positive."

Rail safety regulations require warnings which can be heard by track workers 400 metres ahead of an oncoming train.