Research Article
An Analytical Model for Bandwidth Enhancement of Air-Coupled Unsealed Helmholtz Structural CMUTs
Figure 13
FEM results of the Standard case: SPL comparison of two cells with same hole area ratio, a=60μm 4 holes & a=14.5μm 68 holes (FBW: 3-dB fractional bandwidth, SPL-BWP: SPL-bandwidth product).