Acoustic Impulse Response for Measuring the Firmness and Insidious Fruit Rot of Mango

This project is about development of acoustic impulse response device to measure firmness and insidious fruit rot (IFR) in mango fruit. Harumanis mango farmers face a problem which is an internal tissue breakdown which have cost their fruit quality to drop. This problem also occurs in other countries which had different terms such as “Soft Nose” and “Jelly Seed”. There is almost no device to detect the IFR and the farmers use traditional method. As there is no cure yet for the problem and to detect the IFR is by cut open the mango which is destructive and not productive. This project was developed to solve the problem using non-destructive acoustic impulse response which consists of mechanical excitation to produce vibration of sound and the response will be captured by output sensing medium such as microphone. The signal output will be analyzed and evaluated to differ which fruit has IFR and which does not. This method implements non-destructive method to prevent the device from destroying the fruit and provide a solution for the farmer to sorting their mango fruit. Each fruit sample will be tested three times and the average value will be calculated and classified to determine which fruit has IFR and which does not have IFR. By integrating microcontroller, mechanical excitation module and microphone and some other components and software will help in accomplishment of the objective of this project.