Molten Valkeen Review - Sound graphs - In a stadium

Available here: amzn.to/3TFkwWn See the Valkeen in the world's biggest test:    • World's Biggest Referee Whistle Sound...   How to blow a whistle correctly:    • How to Blow into a Whistle Correctly ...   The Molten Valkeen is a very famous whistle. It is used by many pro referees and it is not just known for its sound, it's known for its price. It's one of the most expensive whistles for all sports but many still buy it because it does have a lot of advantages. The upper resonance tube produces a 4.15 kHz tone and the lower resonance tube creates a 3.67 kHz tone. Instagram: www.instagram.com/refereechannel 0:00 - Review 0:30 - Close distance 0:51 - Medium distance 1:11 - Long distance 1:40 - Echo test

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