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System and method for improved volume measurement

  • US 7,066,029 B2
  • Filed: 09/25/2003
  • Issued: 06/27/2006
  • Est. Priority Date: 09/25/2003
  • Status: Active Grant
First Claim
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1. An apparatus for metering the volume of an aerosolized fluid, the apparatus comprising:

  • a chamber comprising a gas region and a fluid region;

    an atomizer in fluid communication with the fluid region of the chamber for aerosolizing fluid delivered from the fluid region;

    an acoustic source configured to be acoustically coupled to the-gas region of the chamber;

    a microphone configured to be acoustically coupled to the gas region of the chamber; and

    a processor configured to receive a signal from the microphone, and further configured to determine a volume of the gas region of the chamber based on the received signal and thereby to determine a corresponding volume of aerosolized fluid.

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