Table 1 Summary of the dataset filename structure and annotation codes.
From: A High-Quality Underwater Acoustic Dataset for Algorithm Development and Analysis
Code Segment | Meaning | Description / Values |
|---|---|---|
X | Recording Type | A: Regular recording E: Recording with an event or anomaly (described in annotation file) |
xxxxx | Motor Activity Code | 5-digit code: Each digit corresponds to one motor 1st-4th digits: Motors 1-4 (Combustion) 5th digit: Electric motor (ship model) Motors 1-4: 0 = Absent, 1 = Idle disengaged, 2 = Idle engaged forward, 3 = Slow forward, 4 = Medium forward, 5 = Varying Motor 5: 0 = Absent, 1 = Slow forward, 2 = Fast forward, 3 = Slow reverse, 4 = Fast reverse |
T | Transient Section | Always the letter T, marking the beginning of the transient code |
tt | Transient Code | Sum of weights representing combined transient events: 0 = None, 1 = Air discharge, 2 = Water bucket, 4 = Tube hit (mallet), 8 = Tube hit (hammer), 16 = Air rifle |
N | Noise Section | Always the letter N, marking the beginning of the noise code |
nn | Noise Code | Sum of weights representing combined noise sources: 0 = None, 1 = Air bubbling (high), 2 = Air bubbling (low), 4 = Hose (low flow), 8 = Hose (high flow) |
xNN | Recording Number | Optional suffix for repeated setups (e.g., x01, x02) |
Used when multiple recordings exist with the same configuration |
