This paper evaluates the level of interference caused by ultra-wideband (UWB) signal to Bluetooth voice system.

本文评估了超宽带无线系统对蓝牙语音系统的干扰情况。

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Aside from boasting an integrated Bluetooth chip for handsfree calling and voice activation, there's also a built-in FM radio and an intercom system that enables up to four riders to communicate within a full mile of one another.

ENGADGET: Scala Rider G4 Bluetooth headset enables four-way biker communication