Design and Implementation of a Chaotic Acoustic Generator for Agricultural Field Protection

Abstract

Crop production plays a vital role in human survival and is a key driver of the economies of many developing countries. It ensures the supply of staple foods worldwide and represents a major source of income and livelihood for a large portion of the global population. However, this sector remains highly vulnerable to pest attacks, which lead to yield losses and significant economic impacts. Despite the use of various sound-based deterrent systems, their effectiveness remains limited. This limitation is largely due to the periodic nature of the emitted signals. Moreover, animals gradually adapt to repetitive sounds and eventually stop responding to them. In this context, the present study introduces the design of an aperiodic sound generator intended to repel pests from cultivated fields. The proposed system is based on a microcontroller equipped with an analog output, capable of generating a non-periodic electrical signal derived from the implementation of a chaotic dynamical system using the Runge-Kutta numerical method. The generated signal is then amplified and converted into sound waves through a loudspeaker. The analysis of its temporal evolution highlights its non-repetitive nature, thereby confirming its unpredictability. Experimental results show that the device has a deterrent effect on certain pests, particularly weevils as well as poultry