Being heard by cars would be a definite advantage. Example of this is this morning someone was slowly rolling backwards towards me at some lights. I honked my horn - nothing. Shouted - nothing. I ended up having to get my bike out of the way and knock on their window for them to have any idea that they were moving. A loud horn would have made things a lot easier.
In my experience whether it's a bell, a horn, a whistle, or even a megaphone (anyone else seen that chap, often to be seen around St Pauls?) pedestrians nearly always take it as a 'get out of my way' like they would if a car was beeping at them.
Being heard by cars would be a definite advantage. Example of this is this morning someone was slowly rolling backwards towards me at some lights. I honked my horn - nothing. Shouted - nothing. I ended up having to get my bike out of the way and knock on their window for them to have any idea that they were moving. A loud horn would have made things a lot easier.
In my experience whether it's a bell, a horn, a whistle, or even a megaphone (anyone else seen that chap, often to be seen around St Pauls?) pedestrians nearly always take it as a 'get out of my way' like they would if a car was beeping at them.