Living in the country we get problems between riders who arrive quickly and silently with no warning and horses and riders frightened by sudden flashes of cycle colours or dogs , dog walkers and pedestrians in collision with cyclists they didn't see or hear, often because of wind noise in the hedges and trees. Bells often aren't fitted or used. Unlike cars and mororbikes there's no engine noise to give early warning of approach. A shout can often be ineffective and very difficult to work out from which direction it's coming. The only electric horns I've seen are very loud and just as likely to frighten people and animals with accidents therefore likely to happen. Does anyone know of a horn or siren that starts quietly but builds in volume that might solve this problem. Alternatively has anyone got any other good ideas how we can live peacably and safely with others who are using country lanes?