| http://www.w3.org/ns/prov#value | - In an exemplary embodiment in accordance with FIG. 24, a 12 MHz standing wave field with a 125 micron separation between transducer and reflector will produce one or more nodal positions and be more effective at moving the position of relatively small particles within the sound field than a similar sound field in the same manifold but operated at a lower frequency, e.g. 6 MHz.
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