method for detecting the presence of a solid substrate, preferably of wood living insects and / or larvae.

摘要

The examination system uses the measured vibration and/or sound emitted by the insects or larvae. The measured vibration and/or sound pattern is compared with a reference pattern to allow positive identification of the insects or larvae. Pref. the detected vibration or sound signals within the frequency range between 0.01 mHz and 150 kHz, representing the frequencies emitted by the insects or larvae and the background vibration or noise, are amplified and recorded after filtering out the noise signals. The recorded waveform is compared with one or more reference patterns in a frequency range between 100 Hz and 15 kHz, the results being automatically displayed.