An Open-Source Vibrotactile Vest Design for Personalized Rhythmic Sensory Input

Abstract

Abstract. Stereotyped rhythmic movements (commonly referred to as “fidgeting,” “stereotypies,” or “stims”) are often used by individuals to support sensory and emotional regulation, enhance focus, and reduce stress. The therapeutic benefit of these movements is at least partially due to the rhythmic sensory experience generated by the movements. However, stereotyped movements can be inconvenient to engage in, or even harmful in certain contexts. To address this, we developed a discreet, wearable vest that passively delivers rhythmic sensory input through vibrating coin motors embedded between layers of fabric. Designed to be worn under clothing, the vest allows users to control vibration frequency and duty cycle via a Bluetooth-enabled smartphone app, enabling personalized optimization. The device is rechargeable and operates at full power for up to four hours. We quantified vibration pressure, signal frequency, duty cycle, battery life, noise level, and temperature. Results indicate that the device accurately maintains frequency and duty cycle within acceptable error margins and meets all engineering specifications except for battery life. All design elements and source code are openly available, allowing others to replicate or modify the device for their own use. Future work will be needed to evaluate the vest in real-world settings for safety, efficacy, and regulatory compliance.