Choi, Jaehoon Jung, Inki Kang, Chong-Yun 2024-01-19T21:01:11Z 2024-01-19T21:01:11Z 2021-09-02 2019-02 2211-2855 https://pubs.kist.re.kr/handle/201004/120412 Sound energy harvesting is one of the promising technologies due to the abundant and clean sound sources. It can be the semi-permanent alternative power supplies for wireless sensor networks (WSNs), which is significant in the Internet of Things (IoT). However, sound waves have the low energy density, so there are many kinds of research in recent years to overcome this problem. This paper provides a comprehensive review of sound energy harvesting, focusing on presenting principles, examples and enhancement methods of sound energy harvesters. In this paper, various approaches are introduced which are classified as sound pressure amplification and transduction mechanism. For sound pressure amplification, two typical types of energy harvesters are presented that one is using a resonator, another one is using an acoustic metamaterial, and these are based on piezoelectric, electromagnetic, and triboelectric mechanisms to convert sound energy to electrical energy. English ELSEVIER SCIENCE BV ACOUSTIC ENERGY TRIBOELECTRIC NANOGENERATOR HELMHOLTZ RESONATOR INTERNET THINGS ARRAY A brief review of sound energy harvesting Article 10.1016/j.nanoen.2018.11.036 1 NANO ENERGY, v.56, pp.169 - 183 NANO ENERGY 56 169 183 scie scopus 000455264600018 2-s2.0-85057084774 Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Chemistry Science & Technology - Other Topics Materials Science Physics Review ACOUSTIC ENERGY TRIBOELECTRIC NANOGENERATOR HELMHOLTZ RESONATOR INTERNET THINGS ARRAY Sound energy harvesting Resonator Acoustic metamaterial Piezoelectric Electromagnetic Triboelectric