Invention Grant
- Patent Title: Toroid microphone apparatus
- Patent Title (中): 环形麦克风设备
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Application No.: US12637444Application Date: 2009-12-14
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Publication No.: US08259959B2Publication Date: 2012-09-04
- Inventor: Trygve Frederik Marton , Lennart Burenius
- Applicant: Trygve Frederik Marton , Lennart Burenius
- Applicant Address: US CA San Jose
- Assignee: Cisco Technology, Inc.
- Current Assignee: Cisco Technology, Inc.
- Current Assignee Address: US CA San Jose
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- Main IPC: H04R3/00
- IPC: H04R3/00

Abstract:
A video teleconferencing directional microphone includes two microphone elements arranged coincidentally on a vertical axis. The two microphone elements are placed on a supporting surface so that a first microphone element is on the surface, and the second microphone elements are elevated above the supporting surface. The directional microphone also includes filters, an adder assembly, and an equalizer, which are used to shape the directivity pattern of the directional microphone into a toroid sensitivity pattern. The toroid sensitivity pattern increases sensitivity in the direction of a sound source of interest, while simultaneously reduces sensitivity to any sound waves generated by noise sources from certain elevation angles.
Public/Granted literature
- US20100158268A1 TOROID MICROPHONE APPARATUS Public/Granted day:2010-06-24
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