The present invention is a microphone device (108) with an increased membrane flexibility, and decreased acoustic compliance of sealed cavity (200).
The amplitude of the measured nonlinear signals indicates the presence of an acoustically compliant object (8) such as a mine.
A device (10) which employs an acoustic signal having one or more frequencies for penetrating into ground, water, or sediments and vibrating a compliant buried object (8) is provided.
Requêtes fréquentes français :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
Requêtes fréquentes anglais :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
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