The plant sounder is an instrument developed and invented by Professor Hou Tianzhen of China Agricultural University. Based on the theory of plant meridian system, the plant audio generator uses He-Ne laser Doppler effect vibrometer to accurately measure the frequency of spontaneous sound and received sound of plants, and is developed according to different plants and the temperature and humidity at that time.

Plant audio technology is an agricultural high-tech developed in recent years and an important breakthrough in entity agriculture. Its basic principle is to apply sound wave treatment with a specific frequency to plants, which matches the frequency of spontaneous sounds of plants and produces resonance. Promote intracellular mitochondria to produce more solar energy carrier-ATP, provide more energy for plants and improve photosynthetic efficiency; At the same time, audio signal stimulation promotes cell cycle synchronization, accelerates cell division, promotes plant growth and development, and achieves the purpose of increasing yield, improving quality and resisting disease. The technology itself does not pollute the environment, and can also reduce the amount of chemical fertilizers and pesticides, which is in line with the direction of environmental protection and ecological agriculture development. Academician Yuan Longping once commented on this project: "This project has broad application prospects and high expected economic and ecological benefits, so please give it financial support".

The technology and products have the characteristics of less investment and quick effect. Can be widely apply to various crops, vegetable, tea trees, fruit trees and flowers, and has that characteristic of convenient use and simple operation.