/compressed-air-fail-drive-by-shooting/ Tips, Trends, Resources, News and Information Thu, 18 Apr 2024 23:31:16 +0000 hourly 1 https://wordpress.org/?v=7.1.2 /compressed-air-fail-drive-by-shooting/#comment-427431 Thu, 18 Apr 2024 23:31:16 +0000 /?p=8929#comment-427431 Certainly none of my clients are in the underground mining business, THAT would be a real challenge to investigate. I like the idea of a directional microphone to search with, it makes a lot of sense. And it would be rather non-invasive as well.
It may be that some of my current equipment could hear ultrasonic noise.

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