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Patent US10492008
Issued 2019-11-26
Hearing Device With Neural Network-based Microphone Signal Processing
A hearing system performs nonlinear processing of signals received from a plurality of microphones using a neural network to enhance a target signal in a noisy environment. In various embodiments, the neural network can be trained to improve a signal-to-noise ratio without causing substantial distortion of the target signal. An example of the target sound includes speech, and the neural network is used to improve speech intelligibility.
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- 1. A hearing system, comprising:
a plurality of microphones configured to receive input sounds including a target sound and to produce a plurality of microphone signals including the target sound; a control circuit including a neural network and configured to produce an output signal using a processed signal produced by the neural network, the output signal and the processed signal each including the target sound, the neural network configured to receive the plurality of microphone signals and to control directionality of the plurality of microphones by processing the plurality of microphone signals using a nonlinear signal processing algorithm to produce the processed signal; and a receiver configured to produce an output sound using the output signal, wherein the neural network includes:
an input to receive the plurality of microphone signals;
an output;
a linear signal processing path between the input and the output, the linear signal processing path including one or more linear hidden layers; and
a nonlinear signal processing path between the input and the output, the nonlinear signal processing path including one or more nonlinear hidden layers.
- 7. A hearing system configured to be worn by a wearer, comprising:
a pair of left and right hearing aids configured to be worn by the wearer and communicatively coupled to each other, the left and right hearing aids each including: a microphone configured to receive input sounds including a target sound and produce a microphone signal including the target sound; a control circuit including a neural network and configured to produce an output signal using a processed signal produced by the neural network, the output signal and the processed signal each including the target sound, the neural network configured to receive the microphone signals produced by microphones of the left and right hearing aids and to control directionality of the microphones of the left and right hearing aids using a nonlinear signal processing algorithm to produce the processed signal; and a receiver configured to produce an output sound using the output signal, wherein the neural network comprises:
an input to receive the microphone signals;
an output;
a linear signal processing path between the input and the output; and
a nonlinear signal processing path between the input and the output.
- 11. A method for operating a hearing system, comprising:
receiving microphone signals including a target sound from a plurality of microphones of the hearing system; processing the microphone signals using a neural network configured to receive the microphone signals and to produce a processed signal including the target sound using the received microphone signals and a nonlinear signal processing algorithm, including processing the microphone signals using a linear signal processing path and a nonlinear signal processing path, the processing controlling a directionality of the plurality of microphones; producing an output signal including the target sound using the processed signal; and producing an output sound based on the output signal using a receiver of the hearing system.
