Development of a Vibrotactile Wristband Prototype: A Strategy to Reduce Noise Exposure in a NICU

Abstract

Excessive noise in Neonatal Intensive Care Units (NICUs), mainly caused by clinical alarms, poses a risk to the neurological and auditory development of newborns and contributes to fatigue among healthcare personnel. This paper presents the design and preliminary validation of a wireless vibrotactile bracelet prototype intended to reduce noise exposure by transforming visual alarms into vibrotactile signals directly perceived by staff. The system comprises a transmitter module, based on an ESP32 microcontroller and a TCS3200 color sensor for alarm detection, and a receiver module in the bracelet, which generates vibrations via haptic motors. Experimental validation at the Honduras Medical Center NICU demonstrated a reduction of up to 21 dBA in equivalent sound pressure levels (Leq), highlighting the device’s potential as a complementary tool for neonatal safety and clinical ergonomics.