Importance

Loading Importance Indicators...

Abstract

An ultrasonic nebulizer includes a nebulization chamber for holding a liquid to be nebulized, the liquid being limited by an upper boundary within the chamber, and a nebulization source acoustically couplable to the liquid within the chamber to provide therein an ultrasonic output at an amplitude to cause nebulization. The nebulization source is controllable to vary the amplitude of the ultrasonic output to provide a measurement period during which no nebulization occurs, and a sonar device measures, during the measurement period, a time interval between emission of an acoustic pulse toward the boundary and detection of a component of the emitted acoustic pulse reflected from the boundary, and provides an output signal dependent on the measured time interval for use in determining location information of the boundary within the chamber.

Loading the Abstract Image...

First Claim