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Noise values comparison of the gear pump before and after optimization.
| Symbol | Original Pump dB (A) | Optimized Pump dB (A) | Reduction Value dB (A) |
|---|---|---|---|
| The mixed noise value | 100.6 | 95.9 | 4.7 |
| The gear pump noise | 87.6 | 85.9 | 1.7 |
| The driver’s position noise | 81.5 | 79.3 | 2.2 |
| The external radiation noise | 110.3 | 109.3 | 1 |
