Research Article
Impact Analysis of Brake Pad Backplate Structure and Friction Lining Material on Disc-Brake Noise
Table 2
Noise occurrence rate at different frequency bands.
| | Brake application: 1,430 | Number | Rate (%) | f1 (%) | f2 (%) | f3 (%) | f4 (%) | f5 (%) | | Near 7.5 kHz | Near 12.7 kHz | Near 4.1 kHz | Near 1.0 kHz | Near 2.2 kHz |
| | Total noisy brake | 325 | 22.73 | 10.98 | 8.18 | 2.17 | 1.12 | 0.28 | | 70–80 dBA | 141 | 9.86 | 3.71 | 2.73 | 2.03 | 0.28 | 0.28 | | 80–90 dBA | 129 | 9.02 | 5.03 | 3.85 | 0.14 | 0.00 | 0.00 | | 90–100 dBA | 46 | 3.22 | 1.89 | 1.33 | 0.00 | 0.00 | 0.00 | | 100–110 dBA | 9 | 0.63 | 0.35 | 0.28 | 0.00 | 0.00 | 0.00 | | 110–120 dBA | 0 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | | >120 dBA | 0 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
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