Center frequency       kHz                     

            40.0±1.0

Output sound pressure  dB@30cm/10V sine wave

            ≥105

   Receive sensitivity     dB / v / μbar

            ≥-82

   -6dB Directivity      deg.

            70±15

   Ringing Time    ms  

            ≤0.8

  Capacitance   pf   @ 120Hz  25℃

            2000±15%

   Input voltage  Vp-p

              140

   Operating Temperature      ℃

            -40~+80

   Storage Temperature        ℃

            -40~+85

   Materials of the case

            Aluminum

   Type of the terminal  

            Connector

   Length of the lead wire      mm

            2500±20