Sounds you don't hear anymore

There is an advert running at the moment ( the product escapes me) where there is the sound of a modem connecting.. I haven't heard that for years now, and it got me thinking of things of you just don't hear now. A couple of others sprang to mind, like the sound of grating gears on a lorry that was commonplace in the good ol bad ol days, and Ne Nah sirens on emergency vehicles.. Starting to struggle to remember anymore , so over to you lot , what sounds can you remember that you don't hear now ? :p