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![PDF] Modal response-based technical countersurveillance measure against laser microphones | Semantic Scholar](https://d3i71xaburhd42.cloudfront.net/8ac9c9a190e83d9fcd5717980e8d9c83516cd4a9/2-Figure1-1.png "PDF] Modal response-based technical countersurveillance measure against laser microphones | Semantic Scholar")
PDF] Modal response-based technical countersurveillance measure against laser microphones | Semantic Scholar
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PDF) Modal response-based technical countersurveillance measure against laser microphones
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