Ultrasonic Shield System

This study aimed to develop and evaluate the Ultrasonic Shield System, a non-chemical pest control device designed to repel rice ear bugs through ultrasonic sound exposure under controlled laboratory conditions. A research and development (R&D) design combined with a one-shot case study approach was employed to establish baseline performance prior to field deployment. The system utilized a microcontroller-based ultrasonic transducer operating at calibrated frequencies and was tested in an isolated setup to minimize environmental interference. Experimental trials were conducted by exposing rice ear bugs to programmed ultrasonic sound cycles, and pest response was measured through direct observation and video verification, focusing on behavioral disturbance and positional movement as indicators of repellency. Descriptive statistical tools were used to analyze pest reduction and consistency of system performance across trials. The findings revealed a measurable and consistent reduction in rice ear bug presence, indicating a moderate level of pest-control efficacy under controlled conditions. Ultrasonic exposure induced observable changes in pest behavior, including movement away from the sound source, demonstrating that the system was capable of influencing rice ear bug activity without the use of chemical agents. Although complete pest elimination was not achieved, the results suggest that the Ultrasonic Shield System has potential as an eco-friendly alternative to conventional chemical pesticides. The controlled testing environment strengthened internal validity by isolating the effects of ultrasonic sound, providing reliable baseline data to support further system optimization, longer testing periods, and real-field validation for sustainable rice pest management.