dB Drop for Sizing Crack Height

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Just say no to crack (sizing with dB drop)

I had a few folks out of the blue ask me about dB drop for height sizing. For manufactured, perfectly planar sidewall lack of fusion? Meh, you might get repeatable results, but repeatable doesn't mean accurate. For cracks? Wildly innacurate.

Once you get used to seeing messy crack signals on phased array, the futility of dB drop for height sizing becomes apparent. Speaking of a parent, my youngest chirped up on this one, and I got to show off my dorky fake band shirt and collection of signatures from the recent NDTMA 2023 show in Las Vegas.

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