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US09473864B2 Internet protocol addressable public address devices and systems 有权
互联网协议可寻址的公共地址设备和系统

Internet protocol addressable public address devices and systems
Abstract:
Devices, methods, and systems are described herein. One device includes a speaker component to broadcast a message, a microphone component to detect a sound, an IP component to receive the message using a communication path, and a computing component to determine a source of the detected sound.
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