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My brother is a companion stone carver. He's always there when there is an historical monuments to repair, as most insurance companies insists the work is done
by buserror 9y ago
My brother is a companion stone carver. He's always there when there is an historical monuments to repair, as most insurance companies insists the work is done by them.
he's full of cool stories, and taught me quite a few cool tricks, like how to 'listen' to wood when taping it with the handle of a screwdriver to 'hear' if it's still green and/or has faults/cracks.
- ruricolist 9y agoHow does the trick with the screwdriver work, exactly?
- ggg9990 9y agoWater content drastically changes the acoustic transmission properties of porous materials. A tap with a screwdriver is pretty close to a pure impulse, which means it contains all possible sound frequencies overlapped. By tapping wood, listening to it, and then cutting it open, you an learn a correlation between the sound and the water content of the wood and avoid cutting wood too early or too late.