Calibration of the normal pressure transfer function of a compliant fluid-filled cylinder

A method of calibrating the transfer function for a fluid-filled compliant cylinder as a function of wavenumber and frequency, comprising the steps of:

• providing a first compliant cylinder filled with air and having a first linear array of force sensors coupled to the exterior surface of said first compliant cylinder and spaced along the length thereof;
• immersing said first compliant cylinder with said first linear array coupled thereto in a fluid environment;
• generating a first turbulent flow field in said fluid environment at said first linear array;
• measuring a first output voltage generated by said first linear array in said first turbulent flow field, wherein said first output voltage is indicative of pressure incident upon said first linear array;
• adjusting said first output voltage by a calibrated sensitivity of said first linear array;
• providing a second compliant cylinder having the same outside diameter as said first compliant cylinder, said second compliant cylinder having a second linear array of force sensors contained therein and spaced along a central longitudinal axis thereof wherein the number of force sensors in said first linear array is approximately identical to the number of force sensors in said second linear array, said second compliant cylinder further being filled with a fluid that surrounds said second linear array;
• immersing said second compliant cylinder with said second linear array contained therein in said fluid environment;
• generating a second turbulent flow field in said fluid environment about said second complaint cylinder, wherein said first turbulent flow field and said second turbulent flow field are similar in magnitude;
• measuring a second output voltage generated by said second linear array in said second turbulent flow field, wherein said second output voltage is indicative of pressure incident upon said second linear array;
• and
• adjusting said second output voltage by a calibrated sensitivity of said second linear array, wherein a ratio of said first output voltage so-adjusted to said second output voltage so-adjusted is indicative of the transfer function of said second compliant cylinder filled with said fluid.