reverberation characteristic
1.The factor set includes the reverberation time RT, the mean forte sound pressure level LpF, the lateral efficiency LE, the frequency characteristic of early decay time | EDT(f)|, and Vmax(10 lg LE ), the maximum variation of 10 lg LE in a hall.
2.According to the short range detection characteristic and the analytical procedure of the traditional active sonar design theories, the underwater ultrasonic detection theories are studied in depth, including the mathematic models of the ultrasonic channel, emitting wave and echo detection. Furthermore the volume reverberation expression of the underwater ultrasonic detection is deduced, and the CW signal is designed for the emitting wave of the underwater ultrasonic detection system for fuze.
