Piezoelectric array sensing for real-time, broad-band sound radiation measurement

This paper proposes a noise radiation sensor consisting of an array of inde pendent piezoelectric patches connected to an adaptive linear combiner. The coefficients of the linear combiner are adapted in such a way that the mea n-square en or between the reconstructed volume displacement (or velocity) and either numerical or experimental; data is minimized. A numerical study is conducted, to analyze the influence of the size of the piezoelectric arr ay on the reconstructed volume velocity.