Methods are provided for analyzing characteristics of fluids in the context of an acoustic ejection system. Such a system has a controller, an acoustic radiation generator, and a coupling medium coupling the radiation to a reservoir holding fluid. The methods can use acoustic radiation to both perturb...http://www.google.de/patents/US20080173077?utm_source=gb-gplus-sharePatent US20080173077 - Acoustic assessment of characteristics of a fluid relevant to acoustic ejection
