蓝牙耳机的原理图及PCB，是protel格式的-Bluetooth headset schematic and PCB, is protel format

蓝牙全双工语音和数据传输 蓝牙调制和跳频 蓝牙语音传输的相关程序-Bluetooth full duplex voice and data transfer Bluetooth modulation and frequency hopping Bluetooth voice transmission procedures