| Frequency |
Floor |
Door (Glass) |
Wall |
| 125 Hz |
0.020 |
0.010 |
0.120 |
| 250 Hz |
0.030 |
0.010 |
0.090 |
| 500 Hz |
0.050 |
0.020 |
0.070 |
| 1000 Hz |
0.100 |
0.020 |
0.056 |
| 2000 Hz |
0.300 |
0.020 |
0.060 |
| 4000 Hz |
0.500 |
0.030 |
0.070 |
| 8000 Hz |
0.500 |
0.040 |
0.085 |
| 16,000 Hz |
0.500 |
0.050 |
0.100 |