The intensity compensation in four individual Daubenton's bats,expressed as peak and rms SPL (dB decrease per halving of distance from bat to target), for three different target types
| Individual . | Target . | Peak SPL . | rms SPL . | Number of flights . | Number of calls . |
|---|---|---|---|---|---|
| 1 | Small sphere | 3.9 | 5.4 | 6 | 203 |
| 1 | Big sphere | 4.0 | 5.5 | 2 | 67 |
| 1 | Mealworm | 4.4 | 5.8 | 5 | 185 |
| 2 | Small sphere | 4.6 | 5.4 | 3 | 113 |
| 2 | Big sphere | 3.9 | 4.8 | 6 | 222 |
| 2 | Mealworm | 4.0 | 5.0 | 7 | 253 |
| 3 | Small sphere | 3.7 | 5.7 | 5 | 172 |
| 3 | Big sphere | 2.7 | 4.6 | 3 | 99 |
| 3 | Mealworm | 3.5 | 5.3 | 7 | 232 |
| 4 | Small sphere | 4.1 | 4.6 | 2 | 58 |
| 4 | Big sphere | 4.6 | 5.5 | 2 | 63 |
| 4 | Mealworm | 3.8 | 5.2 | 2 | 73 |
| Total | 3.9 | 5.2 | 50 | 1740 | |
| S.D. | 0.5 | 0.4 |
| Individual . | Target . | Peak SPL . | rms SPL . | Number of flights . | Number of calls . |
|---|---|---|---|---|---|
| 1 | Small sphere | 3.9 | 5.4 | 6 | 203 |
| 1 | Big sphere | 4.0 | 5.5 | 2 | 67 |
| 1 | Mealworm | 4.4 | 5.8 | 5 | 185 |
| 2 | Small sphere | 4.6 | 5.4 | 3 | 113 |
| 2 | Big sphere | 3.9 | 4.8 | 6 | 222 |
| 2 | Mealworm | 4.0 | 5.0 | 7 | 253 |
| 3 | Small sphere | 3.7 | 5.7 | 5 | 172 |
| 3 | Big sphere | 2.7 | 4.6 | 3 | 99 |
| 3 | Mealworm | 3.5 | 5.3 | 7 | 232 |
| 4 | Small sphere | 4.1 | 4.6 | 2 | 58 |
| 4 | Big sphere | 4.6 | 5.5 | 2 | 63 |
| 4 | Mealworm | 3.8 | 5.2 | 2 | 73 |
| Total | 3.9 | 5.2 | 50 | 1740 | |
| S.D. | 0.5 | 0.4 |
SPL, sound pressure level; rms, root mean square.
Each of the figures under `peak' and `rms' is the regression coefficient of the function describing the best fit to the intensities emitted during a specific number of flights, totalling a specific number of calls.