materjali kõvaduse katse, mille korral materjali deformeeritakse dünaamilise koormusega, test which is expressed in the following ways: a) as the ratio between dynamic force of impact and surface area of traces on piece made by indenter, b) as a product between a constant value and elastic height rebound of indenter on tested material, c) as a product between a constant and a ratio of elastic recoil energy of indenter on the tested material and impact energy