You are doing something peaceful. Perhaps reading a newspaper, watching "Escape to the Country" on the television or listening to "You and Yours" on Radio 4. And then all of a sudden you are rudely disturbed by the horrible noise of continuous mechanical suction. The vacuum cleaner has been turned on again! Oh no!
It was the same when I was a boy. There I would be happily playing with my Dinky toys on the carpet or buried in "Look and Learn" and our mother would start up the old Hoover. She would come swishing over the carpet with the thing and above the whining din I would hear her commands to move my little cars or lift my legs. I swear that in a slightly malevolent way she loved to observe the discomfiture that was caused by her frequent vacuuming.
In comparison, sweeping brushes are far quieter and more in tune with the human psyche. But a vacuum cleaner - it's like an instrument of aural torture. Over the years, they haven't got any quieter. It seems we can send men to the moon or eradicate smallpox, send Coca Cola to every corner of the planet or develop smartphone technology but we can't produce a silent vacuum cleaner.
If an inventor ever comes up with an efficient, reliable and silent vacuum cleaner, he or she should be awarded the Nobel Prize for Peace. In the meantime I guess we must continue to suppress the annoyance we feel whenever a vacuum cleaner is switched on, waiting for the heavenly feeling that returns when the power is cut.