biostudies-literatureCui NFundamental Research Funds for the Central UniversitiesMinistry of Education of the People's Republic of ChinaNational Natural Science Foundation of ChinaNatural Science Foundation of Shaanxi Provincial Department of Education4909-4914https://www.ebi.ac.uk/biostudies/studies/S-EPMC9416852biostudies-literatureUnknown1(12)Being one of the most common forms of energy existing in the ambient environment, acoustic waves have a great potential to be an energy source. However, the effective energy conversion of an acoustic wave is a great challenge due to its low energy density and broad bandwidth. In this work, we developed a new piezoelectric nanogenerator (PENG), which is mainly composed of a piece of piezoelectric nanofiber/polymer composite membrane. As an energy harvester, the PENG can effectively scavenge a broad low-frequency (from 50 Hz to 400 Hz) acoustic energy from the ambient environment, and it can even scavenge a very weak acoustic energy with a minimum pressure of only 0.18 Pa. When a drum was used as an excitation source, the maximum open-circuit voltage and short-circuit current density of the Nanoscale advancesPiezoelectric nanofiber/polymer composite membrane for noise harvesting and active acoustic wave detection.PMC94168526141A0202251851603162lzujbky-2018-ot04XJS17028513222032019JQ-29151472111BJ190163100042017JQ5036JB181405JB161402JB181403JB161401Lin ALiu JBai SLi YCui NJia XQin YYang RZhang LZhou FfalsePiezoelectric nanofiber/polymer composite membrane for noise harvesting and active acoustic wave detection.Being one of the most common forms of energy existing in the ambient environment, acoustic waves have a great potential to be an energy source. However, the effective energy conversion of an acoustic wave is a great challenge due to its low energy density and broad bandwidth. In this work, we developed a new piezoelectric nanogenerator (PENG), which is mainly composed of a piece of piezoelectric nanofiber/polymer composite membrane. As an energy harvester, the PENG can effectively scavenge a broad low-frequency (from 50 Hz to 400 Hz) acoustic energy from the ambient environment, and it can even scavenge a very weak acoustic energy with a minimum pressure of only 0.18 Pa. When a drum was used as an excitation source, the maximum open-circuit voltage and short-circuit current density of the 2019-01-01T00:00:00Z2019 Dec2025-04-04T03:25:20.2Z2025-02-19T01:37:13.248ZS-EPMC94168523613311910.1039/c9na00484j