I've never taken a tomography class, which could be very interesting, but, what if you were to take 4 or more points to give yourself a better picture of the shape of the decay? Obviously it would be more holes in the bark but are they big enough to allow pathogens of some sort to enter through? If so, could wound dressing prevent it? I don't know, that's why I ask.Correct and I think that chart is provided... the subjectivity comes in when the Arborist interprets the reading. I'm not an accountant I don't interpret numbers but more how it looks, feels and sounds. Which of course is subjective in its own ways, but I'm also not selling decay detection either.
If anyone has used or sat through a class about sonic tomography they will know the more points the better and even then the most minor defect can make a tree look worse than it is. I just think 2 points just isn't enough to map a defect adequately.
But I'm wondering about getting this thing and testing the numbers against what's actually in the wood when it comes down.