Page 60 - HydrophoneHandbook_eReader_Ed2_20151208
P. 60

Hydrophone Handbook

          12. Glossary of Terms

      Term        Definition                                      Symbol  Units  Reference
                                                                           ---
    End-of-       Specification that relates to the end of the    ---            62127-3 3.4
   connector      integral output cable if the hydrophone or              V/Pa
                  hydrophone assembly is provided with such                      62127-3 3.5
    End-of-       a cable; if the hydrophone or hydrophone                V/Pa
   connector      assembly is not provided with an integral                      62127-3 3.6
                  output cable, the specification relates to the           ---
     loaded       output connector firmly connected with the               ---   62127-3 3.7
   sensitivity    hydrophone or hydrophone assembly, not                   ---   62127-3 3.9
                  to an extra cable                                        ---   62127-3 3.10
    End-of-                                                               mm     62127-3 3.11
   connector      Ratio of the instantaneous voltage at the       ML             62127-3 3.8
                  end of any integral cable or output
     loaded       connector of a hydrophone or hydrophone
sensitivity of a  assembly, when connected to a specified
hydrophone or     electric load impedance, to the
 hydrophone       instantaneous acoustic pressure in the
                  undisturbed free field of a plane wave in the
   assembly       position of the reference centre of the
    End-of-       hydrophone if the hydrophone were
   connector      removed
 open-circuit
   sensitivity    Ratio of the instantaneous, open-circuit        MC
    End-of-       voltage at the end of any integral cable or
   connector      output connector of a hydrophone to the
 open-circuit     instantaneous acoustic pressure in the
sensitivity of a  undisturbed free field of a plane wave in the
 hydrophone       position of the reference centre of the
   Free Field     hydrophone if the hydrophone were
 Hydrophone       removed
 Hydrophone
   Assembly       Sound field in a homogeneous and isotropic      ---
 Hydrophone       medium in which the effects of boundaries       ---
                  are negligible                                  ---
       axis       Transducer that produces electric signals in    ---
 Hydrophone       response to waterborne acoustic signals
 geometrical      Combination of hydrophone and
                  hydrophone pre-amplifier
     radius
 Geometrical      Nominal symmetry axis of the hydrophone
  radius of a     active element
 hydrophone
active element    Radius defined by the dimensions of the         ag
                  active element of a hydrophone

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