Damage Detection in Bridge Structures through Compressed Sensing of Crowdsourced Smartphone Data

Figure 19

Comparison between the first three extracted features (MFCCs) for the baseline and validation sets at different compression levels. (a) Compression level = 0%. (b) Compression level = 20%. (c) Compression level = 50%. (d) Compression level = 80%.

(a)

(b)

(c)

(d)