Invention Grant
- Patent Title: Near-field null and beamforming
- Patent Title (中): 近场零和波束形成
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Application No.: US13312498Application Date: 2011-12-06
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Publication No.: US09020163B2Publication Date: 2015-04-28
- Inventor: Ronald Nadim Isaac , Martin E. Johnson
- Applicant: Ronald Nadim Isaac , Martin E. Johnson
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: Blakely, Sokoloff, Taylor & Zafman LLP
- Main IPC: H04R3/00
- IPC: H04R3/00 ; H04B15/00 ; H04B3/20 ; H04R5/027

Abstract:
Devices and methods are disclosed that allow for selective acoustic near-field nulls for microphone arrays. One embodiment may take the form of an electronic device including a speaker and a microphone array. The microphone array may include a first microphone positioned a first distance from the speaker and a second microphone positioned a second distance from the speaker. The first and second microphones are configured to receive an acoustic signal. The microphone array further includes a complex vector filter coupled to the second microphone. The complex vector filter is applied to an output signal of the second microphone to generate an acoustic sensitivity pattern for the array that provides an acoustic null at the location of the speaker.
Public/Granted literature
- US20130142355A1 NEAR-FIELD NULL AND BEAMFORMING Public/Granted day:2013-06-06
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