| 摘要 |
A method for actuating particles comprises the step of exposing the particles to a rapid reciprocating air flow generated by intense sound, preferably of a low frequency. An apparatus for working the method comprises a double resonator (10, 10A, 10B) having a sound generator (18, 18A, 18B) and two resonator compartments (15, 16) which communicate with each other through an air tunnel (17, 17A, 17B, 29, 29A, 29B). The phase shift between the compartments corresponds to a half cycle. The air tunnel is constructed to receive the particles (20, 26, 28, 32) to be actuated. |
