| 主权项 |
1. A method of performing a real ear measurement in a hearing assistance device comprising an ITE part adapted for being located at or in an ear canal of a user, the hearing assistance device comprising a measurement input transducer for converting an input sound signal to an electric input signal, an output transducer for converting an electric output signal to an output sound, a feedback estimation unit for estimating an acoustic feedback path from the output transducer to the measurement input transducer, a memory for storing one or more acoustic feedback estimates, a processing unit operatively connected to the memory, and a probe signal generator for generating a probe signal, the probe signal generator being operatively connected to the output transducer, at least in a specific probe signal mode, the method comprising the steps of
a1) providing a first controlled acoustic feedback path from the output transducer to the measurement input transducer via a standard acoustic coupler; b1) generating a first probe signal; c1) estimating and storing a first estimate of the first controlled acoustic feedback path; and a2) providing a second controlled acoustic feedback path from the output transducer to the measurement input transducer via the residual volume between the ITE part of the hearing aid device and the user's eardrum; b2) generating a second probe signal; c2) estimating and storing a second estimate of the second controlled acoustic feedback path; and e) determining a real ear to coupler difference from said first and second acoustic feedback estimates. |
