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Natural pitch


The hills are alive with the sound of Panopticons.

Unfortunately, one of the six new sculptures destined for the Lancashire moors is causing a right old rumpus in Burnley.

Residents are concerned that Tonkin Liu's Singing Ringing Tree - which produces a high-pitched noise in the wind - could frighten local wildlife. It is believed the plans have now been changed so the tree will make a 'low, tuneful sound' instead.

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