Ceiling microphone assembly

A microphone and component technology, applied in the space/structural arrangement of microphones, electrical components, sensor components, etc., can solve problems such as unnaturalness, complex rooms in conference rooms, chaos, etc., and achieve the effect of capacity growth

Inactive Publication Date: 2006-05-31
POLYCOM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But this type of arrangement complicates the meeting room and clutters the room
[0006] While it is generally acceptable that a person may have

Method used

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  • Ceiling microphone assembly
  • Ceiling microphone assembly
  • Ceiling microphone assembly

Examples

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Embodiment Construction

[0020] figure 2 A typical conference room arrangement 244 is shown. Conference participant 210 is seated at conference table 222 facing video monitor 252 on side wall 242 . Microphone 202 (or multiple microphone elements in a speakerphone such as the Polycom SoundStation VTX-1000 speakerphone) may be placed on a conference table 222 . Speech 232 may propagate within the conference room and may be reflected by walls (eg, 242 ) and ceiling 240 . Reflected sound waves (also known as room reverberation) are typically unwanted and should be rejected by the microphone (if possible). This can be done when using a cardioid mic. Cardioid microphones only accept sound waves in one direction. Reflected sound waves in the opposite direction are rejected. In this way, the cardioid microphone can reject unwanted first order reverberation from the room, resulting in an improvement in the reverberation ratio.

[0021] Since, according to embodiments of the invention, a single cardioid ...

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Abstract

A microphone assembly using a plurality of unidirectional microphone elements is proposed. Mount this microphone assembly overhead, usually above all desired sources and below undesired sources. Signals from the plurality of microphone elements are provided to a microphone operations processor which can mix and gate the signals to ensure an optimal signal/noise ratio. The operational processor can also dynamically track audio sources when such tracking (source localization) is required. The resulting audio signal from the operational processor may be further processed, such as echo cancellation, noise reduction and automatic gain control.

Description

[0001] This application claims priority to U.S. Provisional Patent Application No. 60 / 621,743 (Attorney Docket No. 199-0402PUS), filed October 25, 2004, having the same title and assigned to the same assignee, which is incorporated herein as refer to. technical field [0002] The present invention generally relates to microphone assemblies in systems requiring the conversion of sound waves into electrical signals. Background technique [0003] Microphones are a fundamental and necessary element in any audio system. There are many types of microphones currently in use. Usually, such as figure 1 listed, which are classified into four categories. The first type is omnidirectional microphones 102 . It has a uniform polar response, that is, it accepts sound waves from any direction and produces an electrical signal with the same gain. The second type of microphone (dipolar microphone 104) may respond to sound waves coming primarily from two opposite directions. Sound waves ...

Claims

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Application Information

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IPC IPC(8): H04R5/027H04R1/02H04R1/40H04R3/00H04R5/00
Inventor 杰弗里·罗德曼朱彼德阿兰·尼迈里斯蒂芬·谢弗马丁·G·塞克斯顿
Owner POLYCOM INC
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