中圖分類號(hào)：TP273.5 文獻(xiàn)標(biāo)志碼：A DOI: 10.16157/j.issn.0258-7998.256431 中文引用格式： 韓明明，李博，鐘鵬. 基于PoE技術(shù)的多功能可級(jí)聯(lián)全向會(huì)議麥克風(fēng)設(shè)計(jì)與實(shí)現(xiàn)[J]. 電子技術(shù)應(yīng)用，2025，51(10)：94-100. 英文引用格式： Han Mingming，Li Bo，Zhong Peng. Design and implementation of a multi-functional, cascadable omnidirectional conference microphone based on PoE technology[J]. Application of Electronic Technique，2025，51(10)：94-100.
Design and implementation of a multi-functional， cascadable omnidirectional conference microphone based on PoE technology
Han Mingming1，2，Li Bo1，Zhong Peng2
1.School of Physics， Zhejiang University of Technology；2.ZheJiang Uniview Technologies Co.， Ltd.
Abstract： With the development of a globalized business environment, the widespread adoption of remote work, and potential inconveniences caused by unexpected events, the demand for online meetings has been increasing. To address this need, this paper designs and implements a multi-functional, cascaded omnidirectional conference microphone. The device integrates a System-on-Chip (SoC), touch sensor, and MEMS microphone, combined with Power over Ethernet (PoE) technology, to form a hardware platform that supports audio acquisition, data transmission, and multi-device cascading. In terms of algorithms, the system incorporates echo cancellation and reverberation suppression techniques to enhance audio quality. Experimental results show that a single device can effectively capture sound within a 7-meter radius, supporting up to four cascaded devices for stable operation in large spaces. Additionally, the speaker's frequency response remains within ±60 dB, while the echo cancellation efficiency exceeds 98% and the reverberation suppression ratio reaches over 94%, meeting the design requirements for conference microphones.
Key words : conference microphone；PoE cascade；echo cancellation；reverberation suppression
