Newspaper vendors. When I was a small child in Newcastle upon Tyne, there was a chap that sold the local Evening Chronicle at the Central Station. We used to call him 'Ronnie' because what he shouted sounded like 'Ronnie Gill'.
Tom, here's a younger Ronnie Gill! http://www.chroniclelive.co.uk/news/north-east-news/famous-evening-chronicle-vendor-retires-1419430
The one we kids feared the most was the Knife Grinder. We ran a mile and hid till he had left town as the screeching sound of the wheel was enough to put the fear of God into us.
I remember the ice-cream man. At first he drove a bicycle and rang a bell and then years later he drove a van with music playing that sounded like chimes. Everyone would run out to buy an ice-cream. Now most people have their own ice cream at home. I remember the huge lightening and thunder rainstorms that still take place in the late afternoons on the highveld. They are vivid and beautiful, but also make you feel like crawling under the covers for an afternoon nap.
One sound I remember is the sound of the dinner bell. It was a big bell mounted between two poles somehow. At noon (dinner time) somebody would go out and ring it to tell those who were working in the back field to come to the house and eat dinner. I remember one time when I was still small, somebody let me ring it. When it went up, I would come off the ground. That was fun.