HYDROPHONE CALIBRATION SYSTEM

摘要

Calibration apparatus including a pressure cap and a pressure base that define a pressure chamber that is fillable with a liquid. A reference sensor and a sensor under test are exposed to acoustic pressures in the liquid, and responses measured. The sensor under test is secured through one of the pressure cap or base, and responses measured at acoustic frequencies as low as 0.001 Hz and at hydrostatic pressures of at least 5000 psi.

主权项

1. An apparatus, comprising:
a pressure base and a pressure cap configured to define a pressure chamber, the pressure cap having an aperture configured to expose a hydrophone under test to the pressure chamber, the pressure base configured to retain a reference sensor so as to be exposed to the pressure chamber, wherein the pressure base and pressure cap are coupled so as to retain a liquid in the pressure chamber; a transducer piston exposed to the pressure chamber so as to insonify liquid retained in the pressure chamber; and at least one clamp situated to seal a hydrophone under test with respect to the pressure cap.