中文说明：fp=2400hz,fs=5000hz,rp=3db,rs=25db.求其3dB时的各项参数！-fp = 2400hz, fs = 5000hz, rp = 3db, rs = 25db. for its 3dB at the time of the parameters!
English Description：
fp = 2400hz, fs = 5000hz, rp = 3db, rs = 25db. for its 3dB at the time of the parameters!