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Device and method for assessing a quality class of an object to be tested

  • US 7,873,518 B2
  • Filed: 11/10/2006
  • Issued: 01/18/2011
  • Est. Priority Date: 05/13/2004
  • Status: Expired due to Fees
First Claim
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1. A device for assessing a quality class of a device under test, comprising:

  • a unit for detecting an acoustic non-voice test signal from the device under test;

    a unit for providing a stochastic Markov model including states and transitions between states on the basis of reference measurements of devices of known quality classes, wherein, in the stochastic Markov model, a single probability density distribution is associated with each state, and wherein several states have transitions from a common predecessor state;

    a unit for evaluating the acoustic non-voice test signal using the stochastic Markov model; and

    a unit for associating the device under test with a quality class based on the stochastic Markov model evaluation of the acoustic non-voice test signal.

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