Low latency hearing aid

A method of operating a hearing aid configured to be worn by a user, the method comprising

• providing at least one stream of samples of an electric input signal in a first domain, said at least one electric input signal representing sound in an environment of the heating aid;
• converting said at least one stream of samples of the electric input signal in the first domain to at least one stream of samples of the electric input signal in a second domain;
• processing said at least one electric input signal in the second domain to provide a compensation for the user's hearing impairment, and providing a processed signal as a stream of samples in the second domain;
• converting said stream of samples of the processed signal in the second domain to a stream of samples of the processed signal in the first domain;
• providing stimuli perceivable as sound to the user based on said stream of samples of the processed signal in the first domain,
• converting a first number (N1) of samples from said at least one stream of samples of the electric input signal in the first domain to a second number (N2) of samples in said at least one stream of samples of the electric input signal in the second domain, and
• converting said second number (N2) of samples from said stream of samples of the processed signal in the second domain to said first number (N1) of samples in said stream of samples of the electric input signal in the first domain, and
• wherein the second number (N2) of samples is larger than the first number (N1) of samples, and
• wherein said converting of samples in the first domain to samples the second domain is optimized and wherein said compensation for the user's hearing impairment is provided by a trained neural network.

A method of optimizing parameters of an encoder-/decoder-based hearing aid in order to minimize a difference between an output signal of a target encoder-/decoder-encoder-based hearing aid and an output signal of a filter bank-based hearing aid,

• the encoder-/decoder-encoder-based head ng aid comprising a forward path comprising,
• an encoder configured to convert a stream of samples of an electric input signal in a first domain to a stream of samples of the electric input signal in a second domain;
• a processing unit configured to process said at least one electric input signal in the second domain, to provide a compensation for the user's hearing impairment, and to provide a processed signal as a stream of samples in the second domain;
• a decoder configured to convert said stream of samples of the processed signal in the second domain to a first stream of samples of the processed signal in the first domain;
• the filter bank-based hearing aid comprising a forward path comprising
• a filter bank operating in the Fourier domain, the filter bank comprising
• an analysis filter bank for converting said stream of samples of the electric input signal in the first domain to a signal in the Fourier domain;
• and
• a processing unit connected to the analysis filter bank and the synthesis filter bank and configured to process said signal in the Fourier domain to compensate for the user's hearing impairment and to provide a processed signal in the Fourier domain;
• a synthesis filter bank for converting said processed signal in the Fourier domain to a second stream of samples of the processed signal in the first domain;
• the method comprising
• providing said stream of samples of an electric input signal in a first domain, said at least one electric input signal representing sound in an environment of the target encoder-/decoder-encoder-based hearing aid and/or the filter bank-based hearing aid;
• minimizing a cost function given by the difference between said first and second stream of samples of the processed signal in the first domain to thereby optimize said parameters of the encoder-/decoder-based hearing aid.