Hearing device and method of operating a hearing device

A method of operating a hearing device, the method comprising:

• receiving speech information from a user and transforming the speech information into a speech signal;
• processing the speech signal, by a signal processing unit, and generating an output signal;
• determining at least two respective Geneva Minimalistic Acoustic Parameter Set (GeMAPS) parameters from each of the speech signal and the output signal;
• extracting feature vectors of the speech signal and the output signal, each feature vector including the at least two respective GeMAPS parameters as vector entries;
• determining a length of the feature vector of the speech signal and a length of the feature vector of the output signal;
• comparing the length of the feature vector of the speech signal to the length of the feature vector of the output signal;
• and
• changing parameters of the signal processing unit using a control signal generated as a function of the comparison result if the length of the feature vector of the output signal is less than or equal to the length of the feature vector of the speech signal.