Archives of Acoustics, 42, 1, pp. 61–70, 2017
10.1515/aoa-2017-0007

Detection of Wood Boring Insects’ Larvae Based on the Acoustic Signal Analysis and the Artificial Intelligence Algorithm

Piotr BILSKI
Warsaw University of Technology
Poland

Piotr BOBIŃSKI
Warsaw University of Technology
Poland

Adam KRAJEWSKI
Warsaw University of Life Sciences
Poland

Piotr WITOMSKI
Warsaw University of Life Sciences
Poland

The paper presents an application of signal processing and computational intelligence methods to detect presence of the wood boring insects larvae in the wooden constructions (such as the furniture of buildings). Such insects are one of the main sources of the degradation in such objects, therefore they should be detected as quickly as possible, before inflicting serious damage. The presented work involved the acoustic monitoring for detecting the presence of the larvae inside pieces of wood. An accelerometer was used to record the sound, further analyzed by a computer algorithm extracting features important for artificial-intelligence (AI) based classification employed to detect the old house borer’s (Hylotrupes bajulus L.) activity. The presented task is difficult, as the sounds made by the larvae are of relatively low amplitude and the background noise caused by people, electrical appliances or other sources may significantly degrade the accuracy of detection. The classification of sounds is needed to separate sources of noise which deteriorate the proper larva detection and should be suppressed if possible. The employed
classification was based on features defined in the time domain followed by the support vector machine used as the binary classifier. The results allowed us to assess the effectiveness of the old house borer’s detection by the acoustic analysis enhanced with the AI algorithm.
Keywords: wood boring insects identification; artificial intelligence classification; accelerometer
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DOI: 10.1515/aoa-2017-0007

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