What are you bus drivers doing over my house ?
I live in West Swindon (I know - someone has to !) I often sit in the garden watching you guys tootal over but I've noticed with certain aircraft (and I think its limited to orange and white inbounds to Bristol so I'm guessing Airbus?) that you make a most peculiar engine noise approaching my house. It sounds like a hoover being switched on or like a bottle filling up with water (whooo - ooop sort of sound). From Casper it looks like you're in the descent at about FL15 - FL12 approaching POMAX. Just sort of wondered what you were doing to make that sound and why it's only certain aircraft.
As you can tell I'm not a commercial pilot so an idiot's guide would be appreciated and I'll enjoy a gin and tonic in the sun even more knowing what you're up to.