Abstract

The paper highlights the research on designing, developing and utilising low-cost graphene-based sensors for acoustic applications. Although commercial sensors are available to detect acoustic signals, some limitations are limited access, high cost, and difficulty in replicability. The work showcases the development of low-cost graphene/fabric sensors for acoustic applications. Due to the excellent electromechanical characteristics of graphene, it has been integrated with fabrics to form sensors with high integrity and flexibility. The rise and fall times for the PDMS-based sensors were 32.77 ms and 106.06 ms, respectively, and it was 35.1 ms and 135.02 for the PI-based substrates. The pressure-sensitive nature of these sensors has allowed them to respond to acoustic signals with varied nature, amplitude and frequency. A comparison has been made of their performances when they were attached to two different polymeric substrates, including polydimethylsiloxane and polyimide. The results shown here depict the high potentiality of these sensors and offer a podium towards low-cost acoustic sensing for wearable and industrial applications.