Research Article
Air Ultrasonic Signal Localization with a Beamforming Microphone Array
Table 1
Results of post processing experimental data.
| Ring | 16 Microphones | 32 Microphones | 48 Microphones |
| d | MSL (dB) | API | MSL (dB) | API | MSL (dB) | API | 0.5 D | - | - | -0.20 | 0.65 | -0.25 | 0.66 | 0.65 D | - | - | -2.00 | 0.74 | -1.50 | 0.75 | 0.9 D | -0.89 | 1.08 | -4.10 | 1.10 | -4.10 | 1.12 |
| Spiral 8.2 | 16 Microphones | 32 Microphones | 48 Microphones |
| d | MSL (dB) | API | MSL (dB) | API | MSL (dB) | API | 0.5 D | - | - | -1.45 | 1.54 | -4.10 | 1.67 | 0.65 D | - | - | -4.40 | 1.65 | -6.00 | 1.68 | 0.9 D | -2.24 | 2.00 | -5.65 | 1.89 | -6.20 | 1.94 |
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