Hearing prosthesis with automatic classification of the listening environment

A hearing prosthesis comprising:

• an input signal channel providing a digital input signal in response to acoustic signals from a listening environment,
• processing means adapted to process the digital input signal in accordance with a predetermined signal processing algorithm to generate a processed output signal,
• an output transducer for converting the processed output signal into an electrical or an acoustic output signal,
• the processing means being further adapted to:
• extract feature vectors, O(t), representing predetermined signal features of consecutive signal frames of the digital input signal,
• process the extracted feature vectors, or symbol values derived therefrom, with a Hidden Markov Model associated with a predetermined sound source to determine probability values for the predetermined sound source being active in the listening environment,
• wherein the extracted features vectors represent substantially level independent signal features, or absolute spectrum shape independent signal features, of the consecutive signal frames.