Multidimensional array microphone

Abstract

The embodiment includes an array microphone, the array microphone comprising a plurality of microphone substrates, each having a plurality of microphone elements arranged in a linear pattern along a first axis and configured to cover a plurality of frequency bands, the first linear array comprising a first microphone element from the plurality of microphone elements and one or more second microphone elements from the plurality of microphone elements, wherein the first microphone elements are located on a first axis and one or more second microphone elements are located on a second axis perpendicular to the first axis, and the second linear array comprising a first microphone element and one or more third microphone elements from the plurality of microphone elements, wherein one or more third microphone elements are located on a third axis perpendicular to the first axis and the second axis.

Claims

1. It is an array microphone, The device comprises multiple microphone boards, each having multiple microphone elements arranged in a linear pattern along a first axis and configured to cover multiple frequency bands, and each microphone board is A first linear array comprising a first microphone element among the plurality of microphone elements and one or more second microphone elements among the plurality of microphone elements, wherein the first microphone element is located on the first axis and the one or more second microphone elements are located on a second axis perpendicular to the first axis, An array microphone comprising: a second linear array comprising: a first microphone element and one or more third microphone elements from the plurality of microphone elements, wherein the one or more third microphone elements are located on a third axis perpendicular to the first axis and the second axis.

2. The array microphone according to claim 1, wherein the linear pattern is configured to place the microphone substrate in a harmonically nested configuration to cover the plurality of frequency bands.

3. The array microphone according to claim 1, wherein the microphone substrates are arranged substantially parallel to each other to form the linear pattern.

4. The array microphone according to claim 1, wherein the linear pattern is configured such that the plurality of microphone boards include a central microphone board, a first group of microphone boards arranged on one side of the central microphone board in a first pattern, and a second group of microphone boards arranged on the opposite side of the central microphone board in a second pattern which is a mirror image of the first pattern.

5. The array microphone according to claim 1, wherein the distance between adjacent microphone substrates along the first axis is determined based on the linear aperture size of the array microphone.

6. The array microphone according to claim 1, wherein the distance between adjacent microphone substrates along the first axis is configured based on frequency values ​​included in the plurality of frequency bands.

7. The array microphone according to claim 1, wherein for each microphone substrate, the second linear array is a mirror image of the first linear array.

8. The array microphone according to claim 1, wherein on each microphone substrate, the distance along the second axis between the first microphone element and each of the one or more second microphone elements is configured based on the octave of each of the plurality of frequency bands, and the distance along the third axis between the first microphone element and each of the one or more third microphone elements is configured based on the same octave.

9. The array microphone according to claim 1, wherein the plurality of microphone elements are configured to form a first subarray for covering a first octave of the plurality of frequency bands and a second subarray for covering a second octave of the plurality of frequency bands across the plurality of microphone substrates, and the first subarray is nested within the second subarray.

10. The array microphone according to claim 9, wherein the first microphone elements in the first subarray are separated by a first distance along the first axis, and the first microphone elements in the second subarray are separated by a second distance, which is twice the first distance, along the first axis, thereby harmoniously nesting the first subarray and the second subarray.

11. The array microphone according to claim 1, wherein each microphone board is a printed circuit board configured to form a triangular shape.

12. The array microphone according to claim 1, further comprising a housing configured to enclose the plurality of microphone circuit boards.

13. The array microphone according to claim 1, wherein each of the plurality of microphone elements is a micro-electromechanical system (MEMS) microphone.

14. It is an array microphone, The array microphone comprises a plurality of microphone boards arranged in a first linear pattern along a first axis, the plurality of microphone boards comprising a plurality of microphone elements configured to cover a plurality of frequency bands, and each microphone board is Among the plurality of microphone elements, the first microphone element located on the first axis, Among the plurality of microphone elements, one or more second microphone elements located on the second axis of the microphone substrate, wherein the second axis is perpendicular to the first axis, The system comprises one or more third microphone elements among the plurality of microphone elements, which are located on the third axis of the microphone substrate, wherein the third axis is perpendicular to the first axis and the second axis. The first microphone elements of the plurality of microphone substrates are configured to form the first linear pattern along the first axis, An array microphone in which, for each microphone substrate, the first microphone element and one or more second microphone elements are configured to form a second linear pattern along the second axis of the corresponding microphone substrate, and the first microphone element and one or more third microphone elements are configured to form the second linear pattern along the third axis of the corresponding microphone substrate.

15. The array microphone according to claim 14, wherein the first linear pattern is configured to place the microphone substrate in a harmonically nested configuration to cover the plurality of frequency bands.

16. It is a microphone system, An array microphone comprising multiple microphone elements arranged on multiple microphone substrates, wherein the array microphone is configured to provide audio coverage over multiple frequency bands, The array microphone communicates with one or more audio processors, each of which has one or more beamformers, and the one or more audio processors uses the one or more beamformers, The audio pickup lobe of the array microphone is guided toward the sound source detected at the first point, It is configured to generate an audio output based on an audio signal generated by the aforementioned sound source and captured using the aforementioned audio pickup lobe, A microphone system in which one or more beamformers are configured to guide the audio pickup lobe toward one of a plurality of points located on a sphere surrounding the center of the array microphone, the plurality of points including the first point.

17. The microphone system according to claim 16, wherein the plurality of points are located at different azimuth and elevation angles around the sphere.

18. The microphone system according to claim 16, wherein the aforementioned points cover a solid angle of four times π steradians.

19. The microphone according to claim 16, wherein the audio pickup lobe includes the direction of maximum sensitivity for the array microphone.

20. The plurality of microphone boards are arranged in a first linear pattern along a first axis, and each microphone board is A first linear array comprising a first subset of the plurality of microphone elements, wherein the first subset is configured to form a second linear pattern along a second axis of a corresponding microphone substrate, A second linear array comprising a second subset of the plurality of microphone elements, wherein the second subset is configured to form a mirror image of the first linear array along a third axis of the corresponding microphone substrate, The microphone system according to claim 16, wherein the second axis is perpendicular to the first axis, and the third axis is perpendicular to the first axis and the second axis.

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