It's been described as a howl, a hum and a scream. But whatever you call the eerie sound emanating from Manchester's Beetham Tower, it seems to be annoying everyone who lives near it.
A clip taken on Sunday, when the city faced gale-force winds from Storm Clodagh, captured the eerie - and incredibly loud - noises made by the 47-floor tower on Deansgate every time the wind picked up.
Beetham Tower's roof's glass blade humming pic.twitter.com/O5fElfP2Z7— DCHomos (@DCHomos) November 30, 2015
And residents were quick to comment about the sci-fi sounds coming from the £150 million building:
To all the tourists in Manchester; it's not an air raid siren, you're not being abducted, it's just the Beetham Tower having a whinge.— Ciaran Watkins (@CiaranWatkins) November 29, 2015
I think I heard the Beetham Tower noise this afternoon. Panic over: it's not a UFO— Rob Grant (@grant_rob) November 29, 2015
@bevismusson thank you!— Beetham Tower (@BeetHUMMMMTower) November 29, 2015
And of course Twitter took the mysterious noise to a whole new level:
FOR NEXT HOUR, YOU ASK BEETHAM ANY QUESTION, ME ANSWER. GRRRRRR. #ASKBEETHAM— Angry Beetham (@AngryBeetham) December 1, 2015
WHOLE OF MANCHESTER LISTEN TO ANGRY TOWER. GRAAAAGH.— Angry Beetham (@AngryBeetham) December 1, 2015
GRRRRRR. TUESDAY WORST DAY. BEETHAM SMASH TO SMITHEREEN.— Angry Beetham (@AngryBeetham) December 1, 2015
BEETHAM MAKE SUPER NOISE. MAKE YOUR PUNY EARS FALL OFF.— Angry Beetham (@AngryBeetham) November 29, 2015
ANGRY TOWER EXTRA ANGRY TODAY. HUMANS BETTER BEWARE.— Angry Beetham (@AngryBeetham) November 29, 2015
😮 YAAAAYYYY!!!! 😁 🎼 DO DO DODO DO DO DI DO DODO DO DO DO DO DO, I CANT GET NO SLEEPS 🎤☺️ https://t.co/Ibn3KrFFAl— Happy Beetham! (@HappyBeetham) December 1, 2015
*Picks up gong basher* ☺️— Happy Beetham! (@HappyBeetham) November 30, 2015
Architect Ian Simpson has apologised for the building's unintentional sound effects, telling the Manchester Evening News that they're caused by winds rushing over the glass "blade" at the top.
The blade is decorative, Simpson said.
"I am completely aware of the noise because I live at the top of the building," Simpson told the paper in 2012. "I would like to apologize for that and we are looking to address it so that next year we don’t have the same problem."
The 554ft-high Beetham Tower, completed in 2006, is the 12th tallest building in the UK and the tallest outside of London.