Howl detection in an audio system
AssigneeNuance Hearing Ltd.
InventorsYehonatan Hertzberg, Boaz Castro, Gal Shemesh
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Abstract
An audio system includes one or more microphones, a speaker and processing circuitry. The one or more microphones are configured to output electrical signals in response to acoustic waves that are incident on the microphones. The processing circuitry is configured to amplify and filter the electrical signals, using a digital filter, so as to generate a drive signal for input to the speaker, to detect that a howl signal is building up by identifying in the drive signal multiple frequency components that are separated from one another by a constant frequency difference, and to adjust the drive signal to suppress the howl signal.
Claims15
An audio system, comprising:
- one or more microphones, which are configured to output electrical signals in response to acoustic waves that are incident on the microphones;
- a speaker;
- and
- processing circuitry, which is configured to amplify and filter the electrical signals, using a digital filter, so as to generate a drive signal for input to the speaker, to detect that a howl signal is building up by identifying in the drive signal multiple frequency components that are separated from one another by a constant frequency difference, and to adjust the drive signal to suppress the howl signal.
A method for audio processing, comprising:
- mounting one or more microphones, which output electrical signals in response to acoustic waves that are incident on the microphones;
- mounting a speaker;
- amplifying and filtering the electrical signals, using a digital filter, so as to generate a drive signal for input to the speaker;
- detecting that a howl signal is building up by identifying in the drive signal multiple frequency components that are separated from one another by a constant frequency difference;
- and
- adjusting the drive signal to suppress the howl signal.
A head-mountable device (HMD), comprising:
- a frame, which is configured for mounting on a head of a subject;
- one or more microphones mounted on the frame and configured to output electrical signals in response to acoustic waves that are incident on the microphones;
- a speaker mounted on the frame;
- and
- processing circuitry, which is configured to amplify and filter the electrical signals, using a digital filter, so as to generate a drive signal for input to the speaker, to detect that a howl signal is building up by identifying in the drive signal multiple frequency components that are separated from one another by a constant frequency difference, and to adjust the drive signal to suppress the howl signal.
Dependencies are inferred from the claim text.