What is the Tube that makes funny noise?

A Groan Tube is a toy, which when turned on one end, makes a distinct 'groan' sound. This is due to a noise maker in the tube, that when it falls, vibrates in the air making the noise. The groan tube was invented in the early 1960s by Japanese toy manufacturer Kureo. The toy was first sold as 'Magic Noise Tube (????).



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Dr Sollini told the programme: “The Central Line has the loudest section out of all of the Tube lines, and it basically gets as loud as almost 110db, to put that into perspective that is approximately as loud as going to a gig or rock concert.

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