Odd Sound
This afternoon, I had an odd experience...
Driving home along Cambridge Heath Road here in East London, I was suddenly faced with a police car, with lights flashing, but no siren, hurtling down the wrong side of the road towards me. Me and my Vespa pulled over very quickly, and the car zoomed past, the bobby driving giving me a wave.
I carried on, but moments later I heard a the sirens of an ambulance behind me. I looked behind and there it was, so I again pulled over, and the ambulance passed me at great speed.
Somewhat alarmed, i set off again. As i did so, I heard a "bleep... BLEEP". distinctly from inside my head, that is, it appeared not to come from an external source. It sounded like the noise made by an 80s videogame, just two crude electronic notes, one high and one low.
I should point out that my Vespa is 26 years old and has quite a noisy engine. With that and my helmet, it's very hard to hear anything other than, say, a siren or another loud engine when moving.
I tried all sorts of head waggles to replicate the sound but I couldn't. It definately sounded electronic, and I wondered if it could be somehow connected to the two emergency service vehicles I encountered, which presumably are brimming with transmitting equipment!
Incidentally, I've heard stories of people picking up radio transmissions on hearing aids (I don't wear one) and even through their fillings. If it helps, I've got a mouth full of metal, and one of them is loose, and I was also wearing glasses!