Microphone apparatus and electronic device having linear microphone array with non-uniform configuration and method of processing sound signal
AssigneeWistron Corporation
InventorHan Yi Liu
Life of this patent
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Abstract
A microphone apparatus is provided. The microphone apparatus includes a microphone array and an integrated circuit. The microphone array includes at least three microphones arranged in a straight line with a non-uniform configuration. The integrated circuit is electrically connected to the microphone array. The integrated circuit is configured to process a merged sound signal from different combinations of microphones using a time-domain filter to generate an output sound signal. The sound gain of the output sound signal at each sound-receiving angle of each frequency is substantially uniform.
Claims11
A microphone apparatus, comprising:
- a microphone array, comprising at least three microphones arranged in a straight line with a non-uniform configuration;
- and
- an integrated circuit, electrically connected to the microphone array, wherein the integrated circuit is configured to process a merged sound signal from different combinations of the microphones using a time-domain filter to generate an output sound signal,
- wherein the output sound signal is a time-domain sound signal, and a sound gain of the output sound signal at each sound-receiving angle of each frequency is substantially uniform,
- wherein the output sound signal is omni-directional.
A method of processing a sound signal, comprising:
- providing a microphone array, wherein the microphone array comprises at least three microphones arranged in a straight line with a non-uniform configuration;
- and
- processing a merged sound signal from different combinations of the microphones using a time-domain filter to generate an output sound signal, wherein the output sound signal is a time-domain sound signal, and a sound gain of the output sound signal at each sound-receiving angle of each frequency is substantially uniform,
- wherein the output sound signal is omni-directional.
An electronic device, comprising:
- a microphone apparatus, comprising:
- a microphone array, comprising at least three microphones arranged in a straight line with a non-uniform configuration;
- and
- an integrated circuit, electrically connected to the microphone array, wherein the integrated circuit is configured to process a merged sound signal from different combinations of the microphones using a time-domain filter to generate an output sound signal, wherein the output sound signal is a time-domain sound signal, and a sound gain of the output sound signal at each sound-receiving angle of each frequency is substantially uniform, wherein the output sound signal is omni-directional;
- and
- a processor, electrically connected to the microphone apparatus, configured to perform a fast Fourier transform (FFT) on the output sound signal to obtain a frequency-domain sound signal for speech recognition.
Dependencies are inferred from the claim text.