Two Tone Whistle

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In my continued quest for a noise maker I revamped the previous whistle to make it a two tone whistle (there are 2 whistles side by side with differing lengths of tube to make different tones). I also made this one from 5mm perspex rather than 3mm perspex. This is very much louder but I'll have to wait till the morning before I can let the kids loose on it. 


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