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Acoustic emission (AE) sensing that captures the movements of living organisms.

Keywords: Acoustic Emission, Plants, Microorganisms, Electret Sensor, Ultrasound, Acoustic, Non-destructive Evaluation

When water moves within plant bodies, small bubbles are generated, leading to the occurrence of acoustic emissions (AE). We have advanced research on sensors that detect these minute AEs and developed a sensor capable of detecting plant AEs using a charged material known as an electret. This technology allows for real-time information about the moisture status of plants and aims to be practical as a cultivation support technology for crops where watering management is crucial, such as tomatoes. Furthermore, the developed sensor covers a very wide frequency range from 1 Hz to 300 kHz, which means it has the potential to detect AEs emitted by various organisms. Currently, we are challenging the sensing of AEs from organisms such as algae and honeybees, exploring promising fields of AE sensing beyond crop cultivation. In the future, we aim to realize a society that connects diverse ecosystems and people by sensing the sounds of life, not only in agriculture but across various fields!