These whistling tubes or ‘noise-makers’ will keep children entertained for hours, whilst also demonstrating the fascinating physics behind music.
Simply twirl the red tube around and the air moving through it produces a range of tones, loosely on the harmonic scale. When you twirl faster a higher tone is produced.
Product overview
When twirling the Wind Whistler the air molecules within the tube begin to bump together, they vibrate and produce sound waves.
This very simple item, believe it or not, beautifully demonstrates ‘Bernoulli’s Principle’ – that fast moving air molecules create lower pressure.
The idea is that the far end of the hose is moving much faster than the end being held so the higher pressure at the held end effectively sucks up air which in turn creates the whistle.
- Great as a group or classroom activity
- Made from 106cm length of strong red plastic tubing
Specification
Delivery & returns
Deliveries
Most orders are processed within one working day of receipt of order, subject to stock availability
Delivery costs vary dependant upon weight, size, location and method. Prices are calculated when items are placed in your basket.
For standard delivery within the UK we use the Royal Mail 48 hour tracked service.
Fedex or DHL are used for next day services. (Highlands & Islands are often two day services)
Free Delivery over £95 - This applies to orders delivered to the UK mainland only (excludes Highlands & Islands)
View our full delivery policy here.
No quibble 28 day returns policy
You should let us know within 14 days of receiving the goods if you wish to return an item. You then have a further 14 days from letting us know to get it back to us. Once the item has been despatched it becomes your responsibility to return an order or item in an unmarked and resaleable condition before we can issue a refund to you. Please note that return postage charges cannot be refunded unless the product is faulty or not as described. Items not returned within the agreed period of time may not be accepted, or may be subject to a 20% restocking fee, this will be at our discretion. Also please note that this only applies to individual customers.