| 摘要 |
The application relates to a method of providing a long term feedback path estimate of a listening device, and a listening device. The object of the present application is to provide an improved long term feedback path estimate in a listening device. The problem is solved in that the method comprises a) providing an estimate of the current feedback path; b) providing a number ND of detectors of parameters or properties of the acoustic environment of the listening device and/or of a signal of the listening device, each detector providing one or more detector signals; c) providing a criterion for deciding whether an estimate of the current feedback path is reliable based on said detector signals; d) storing said estimate of the current feedback path, if said criterion IS fulfilled and neglecting said estimate of the current feedback path, if said criterion is NOT fulfilled; e) providing a long term estimate of the feedback path based on said stored estimate(s) of the current feedback path. This has the advantage of providing a more reliable long term feedback path estimate allowing a comparison with a current feedback path estimate, to verify a possible misfit of a mould or other ITE part of a listening device (e.g. to identify a misfit due to the growth of an ear canal of a child). The invention may e.g. be used in hearing aids, headsets, ear phones, active ear protection systems. |
