Table 5 Average RT60 values of the room where the measurements were performed
From: High precision hybrid RF and ultrasonic chirp-based ranging for low-power IoT nodes
Frequency (Hz) | 250 | 500 | 1000 | 2000 | 4000 | 8000 |
|---|---|---|---|---|---|---|
RT60 (s) | 1.17 | 0.94 | 0.78 | 0.78 | 0.79 | 0.59 |
Uncertainty (%) | 7.8 | 6.2 | 4.8 | 3.4 | 2.4 | 1.9 |