Dita Istiqomah, Sri Budiawanti, Hadi Nasbey, Maqbul Kamaruddin, Dewanto Harjunowibowo
Accurate resonance frequency measurement is fundamental in physics education to understand the wave and resonance phenomena. However, many educational laboratories face challenges accessing precise and affordable measurement tools. We initiated this work with a thorough review of existing models, which helped us identify certain limitations, particularly concerning detailed calibration. Our chosen approach centred on building an experimental device, an Arduino UNO integrated with a MAX4466 sound sensor. Calibration was performed systematically by comparing its measured frequencies against a standard audio generator, deriving a robust calibration equation via linear regression. As a result, this calibrated device significantly enhanced the accuracy of frequency measurements by 0.02% and distance measurements by 0.56%. In addition, this device also increased the uncertainty of frequency measurements by 0.17% and distance measurements by 4.07%, respectively. The linear regression model effectively mitigated systematic errors across the tested frequency range. Notably, while the apparatus exhibited good initial accuracy even pre-calibration, the calibration is still important to maintain data linearity and reduce uncertainty. Nevertheless, this apparatus potentially provides a convenient tool for enriching hands-on experimental learning, effectively emphasising the development of reliable and truly accessible instrumentation in educational settings. © Published under licence by IOP Publishing Ltd.
Department of Physics Education, Sebelas Maret University, Surakarta, Indonesia; Department of Physics, Jakarta State University, Jakarta, Indonesia; Department of ICT Integrated Ocean Smart City Engineering, Dong-A University, Busan, 49315, South Korea; Department of Architecture, Institut Teknologi Sumatera, South Lampung Regency, 35365, Indonesia