回声信息量的英文

• echo information

• 回声:    echo; bounce back; reverbera ...
• 脉冲回声信息:    pulse echo information
• 数字回声信息:    digital echo information
• 信息量:    amount of information; contents of information; information channel; information contents; information quantity; measure of information; message amount; quantity of information; traffic
• 声信息:    acoustic intelligence