CBobby

Primarily The motherboard was only expected to be good enough but later on the Daughterboard was used to convert the pulsating DC signal to logic level signal. A daughterboard prototype was added to the design

After preparing the PCB board it have been noticed that the higher frequency BPF's are very noisy and the problem was related to the ceramic capacitor resonant frequency.  

After designing the primary circuit diagram the motherboard circuit diagram was prepared.

08/05/2018 to 15/05/2018 (tentative) --- Software "Audacity" was used to study the audio spectrum of the blast fusing acoustic data samples. 

22/04/2018 to 07/05/2018 (tentative) --- Audio sample collection for underwater explosion and other under water or coral-reef native acoustic activities. Important resource database:

https://dosits.org/galleries/audio-gallery/

21/04/2018 --- Preliminary design concept and circuit diagram was created.

23/03/2018 (tentative) --- the primary research concept was selected and based on that few background study was performed to understand the current status of the problem and probable solution for it. At that time these main literatures were found as a proof of concept:

1. Showen, R. L. (Los A. C., Calhoun, R. B. (Oberlin, O. and Dunham, J. W. (San F. C. (2009) ‘Acoustic location of gunshots using combined angle of arrival and time of arrival measurements’. Available at: http://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=edspgr&AN=edspgr.07599252 (Accessed: 30 August 2020).
2. Woodman, G., Wilson, S., Li, V. and Renneberg, R., 2003. Acoustic characteristics of fish bombing: potential to develop an automated blast detector. Marine Pollution Bulletin, 46(1), pp.99-106.
3. Woodman, G., Wilson, S., Li, V. and Renneberg, R., 2004. A direction-sensitive underwater blast detector and its application for managing blast fishing. Marine Pollution Bulletin, 49(11-12), pp.964-973.