A METHOD FOR MEASURING THE DYNAMIC REFLECTION AND ABSORPTION OF CONCRETE WALLS USING A MICROCONTROLLER

Abstract

This research presents a method of the dynamic measurement of the reflection and acoustic absorption of the concrete walls, using the Arduino UNO R3 Version 1.5.8 microcontroller and noise level analysis. The result is displayed in the decibel level by using the sound signal within the frequency range from 20 to 20,000 Hz, and the volume of 0 to 130 decibels are employed to measure the absorption, reflection and transmission of the tested wall. Before the calculation, the viewing reflection coefficient and loss of passage of concrete wall was investigated. The result obtained has shown that the viewing coefficient is 0.75 - 1.0, the reflection coefficient is 0 - 0.5, and the loss of concrete wall transmission is 3.5 - 20 decibels. The system error have a value of 2.497%. In application, the proposed method can be applied to the measurement of the absorption coefficient and the transmission of sound signals in the various forms. The deterioration of the sound insulation and the loss of sound transmission of different types of walls can also be measured and investigated. The coefficient affects the change in the condition of the concrete walls, from the rate of deterioration of the surface of a concrete wall. This design of the concrete wall is suitable for housing condition design and implementation.