In order to verify the validity for signal phase matching principle, the experiments of DOA (Direction of Arrival) estimation are carried out at reservoir by using 16-sensor array.
为了验证信号相位匹配原理的正确性，利用自制的16元线列阵，在水库进行了声源定向实验研究。
2
Accepting equipment demodulates the accepted signal and carry out corresponding order according to the meaning ofsignal.
接受设备对来自发送设备调制信号进行解调，根据解调后的信号的含义执行相应的命令。
3
When being in operation, the electronic radio receiver sends out cue signal if sound signal is not accorded with the condition of volume in order to make adjustment in time.