For cat lovers, there is nothing more soothing than the sound of their pet purring with contentment.
But when Smokey kicks off, it's time to reach for the ear plugs.
The sound she produces can reach an incredible 92 decibels – the same as you'd experience watching a Boeing 737 coming in to land.
Even from five feet away the level is 80 decibels, the same as a car passing 25ft away. Most cats produce around 25 decibels.
Owners Ruth and Mark Adams say the 12-year-old British Shorthair can drown out TV and radio shows and phone conversations with her 'cooing purr' which they describe as 'sounding as if she has a dove stuck in her throat'.