| Column Label | Meaning |
| Measurement ID | A unique identifier for the measurement of which this tone hole data is part. |
| Joint Type | The joint (head, middle, bell) where the tone hole in question is located |
| Hole ID | An identifier for the hole being measured |
|
Angle Lengthwise |
This is the angle at which the tone hole center emerges from the instrument
relative to the axis of the joint facing downward; < 90° means the tone hole is angled downward as it emerges; > 90° means it is angled upward as it emerges; = 90° means it is roughly right angles to the bore axis as it emerges. Unless noted otherwise this is a very rough approxiamation (a rough visual estimate): expect errors as much as ± 10° or 15° |
|
Angle Crosswise |
This is the angle at which the tone hole center emerges from the instrument
relative to the axis of the tone hole in the plane through the tone hole centers < 90° means the tone hole is angled to the right as it emerges; > 90° means it is angled to the left as it emerges; = 90° means it is roughly right angles to the bore axis as it emerges. Unless noted otherwise this is a very rough approxiamation (a rough visual estimate): expect errors as much as ± 10° or 15° |
|
Undercutting Type |
Either Symmetric (meaning that the flare extends equally both above and below),
Upstream (the flare extends toward the top of the joint) or Downstream (the flare extends toward the bottom of the joint). It is also used for a simple descriptive note (e.g. "slight undercutting"). |
|
Undercutting Depth |
An approxiamate measure for how much of the depth of the tone hole has been
undercut as percentage, e.g. 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 100% Unless noted otherwise this is a very rough approxiamation (a rough visual estimate): expect errors as much as ± 10% or 15% |
|
Undercutting Angle |
This is an approxiamate angle of the undercutting relative to the tone hole axis.
A negative angle means the hole flares outward. Unless noted otherwise this is a very rough approxiamation (a rough visual estimate): expect errors as much as ± 10° or 15° |