The invention discloses a
noise power generating device based on a micro-perforated panel structure and relates to the technology of reducing
noise and the technology of
energy harvesting. The
noise power generating device based on the micro-perforated panel structure comprises a micro-perforated
silicon wafer, an
electricity-conducting support, sensitive piezoelectric films, extraction electrodes and a film supporting body. The micro-perforated
silicon wafer is of a sound adsorbing noise lowering structure. The
electricity conducting support can not only form a cavity needed by a
resonance sound absorption structure but also serve as a structure being connected with electrodes on the piezoelectric films. The lower portion of the
silicon wafer is provided with the piezoelectric films. On the one hand, the silicon wafer closes a
resonant cavity, and on the other hand, the suspended piezoelectric films above the silicon wafer can continuously vibrate under the action of sound
waves and generate polarization charges. In addition, the polarization charges can be collected through an upper layer of film electrodes and a lower layer of film electrodes. According to the
noise power generating device based on the micro-perforated panel structure, micro-mechanic
electronic process technology is applied, and the silicon wafer is made into the micro-perforated panel structure so as to lower noise. In addition,
acoustic energy contained by the noise serves as an
energy source of
energy harvesting devices, the
acoustic energy is converted into
electricity, and therefore noise lowering and power generation are mutually promoted. The
noise power generating device based on the micro-perforated panel structure has the advantages of being simple in structure and capable of being prepared in batch.