The pipe organ inspired backplate proposed in this project is a novel design that can improve the bandwidth of air-coupled PMUTs without sensitivity loss or increase of active area. The electronic data set provided the original data of the journal paper which has been accepted by IEEE UFFC. Figure 6&8 is the result simulated by COMSOL to prove theory. Figure 9 is the simulated frequency response of pipe organ and conventional transducers. Figure 13 is the Average displacement spectrum of the active area measured by 3D LDV. Figures 15 & 16 show the electrical signal response in TVR and RVR between the standard and pipe organ inspired devices. More detail will be introduced in the paper "“Pipe Organ” Inspired Air-coupled Ultrasonic Transducers with Broader Bandwidth".