Thinner plastic allows the soil to heat up better but also tears more easily. Use plastic with a thickness of 1 to 4 mils for best results. Fill in the ditch around the perimeter with soil to hold the plastic in place. You may also wish to add rocks to the edges to help hold down the plastic.
The didgeridoo is a wind instrument traditionally made from the trunk of termite hollowed eucalyptus trees from Australia (like the one pictured at left, which is being played by our mate Lewis Burns).
Termite hollowed didgeridoos have a very irregular inner surface unique to each didgeridoo which do give many a genuine didgeridoo very interesting sound characteristics, but make it far too complicated to describe physically. So for the purpose of this page we need to reduce a didgeridoo to a perfect pipe.Consequently this page is really about the physics of a PVC didgeridoo or any other didgeridoo as long as the inside diameter is exactly the same for the whole length of the didgeridoo.Next lets have a look at some basic music theory:ermite hollowed didgeridoos have a very irregular inner surface unique to each didgeridoo which do give many a genuine didgeridoo very interesting sound characteristics, but make it far too complicated to describe physically. So for the purpose of this page we need to reduce a didgeridoo to a perfect pipe.