PWR-030 · checking page
Check your work: Describe footstep sound in a declared recording without changing gait
Use this page only after every exercise response is locked. Return to the tutorial if you opened it too early.
Staged checking material
Answer key
- Answers: Clip: A; Sorted readings dba: 61; 62; 63; 64; 65; Median peak dba: 63; Range dba: 4; Clip: B; Sorted readings dba: 54; 55; 55; 55; 56; Median peak dba: 55; Range dba: 2; Clip: C; Sorted readings dba: 67; 68; 68; 69; 70; Median peak dba: 68; Range dba: 3
- Comparison key: A and B match on footwear, aid, speed, microphone distance, and meter mode; surface differs. B's median peak is 8 dB lower than A's in this fictional setup: 63 - 55 = 8 dB.; A and C differ on footwear/aid, speed, and microphone distance, so the 5 dB median difference cannot be treated as a like-for-like gait or surface comparison.; No row contains force-plate data, so no force or loading conclusion is scorable.
Scoring rule
Award 1 point per correct median and range, 2 points for the A/B configuration comparison, 2 points for rejecting A/C as like-for-like, and 2 points for the sound-not-force boundary: 12 points total.
Authority boundary: A governed exercise is available only in the declared configuration, dose and stopping rules.