Table 1.
The root-mean-square error (RMSE) of direction finding using MUSIC algorithm for different microphone arrays.
| Array Aperture (cm) | RMSE of Direction Finding | ||||||
|---|---|---|---|---|---|---|---|
|
| |||||||
| 20 dB | 10 dB | Room Music | |||||
|
| |||||||
| 500 Hz | 1000 Hz | 2000 Hz | 500 Hz | 1000 Hz | 2000 Hz | ||
| Four microphones | |||||||
| 0.5 | 8.33 | 4.05 | 1.89 | 35.12 | 13.06 | 5.94 | 16.75 |
| 2 | 2.01 | 1.03 | 0.50 | 6.16 | 3.23 | 1.57 | 3.25 |
| 4 | 1.03 | 0.50 | 0.25 | 3.16 | 1.53 | 0.80 | 2.25 |
| Three microphones | |||||||
| 0.5 | 9.14 | 4.48 | 2.23 | 38.67 | 15.33 | 7.07 | 30.50 |
| 2 | 2.25 | 1.15 | 0.56 | 7.29 | 3.44 | 1.82 | 15.46 |
| 4 | 1.15 | 0.54 | 0.28 | 3.60 | 1.81 | 0.93 | 8.46 |