Table II.
Tympanometry results for two 3-week-old infants
| Newborn 1 | ||||
|---|---|---|---|---|
| Frequency (Hz) | 226 | 630 | 800 | 1000 |
| B+ (mmho) | 0.5 | 1 | 0.875 | 1 |
| B− (mmho) | 0.26 | 0.5 | 0.45 | 0.47 |
| ΔB (mmho) | 0.24 | 0.5 | 0.425 | 0.53 |
| ΔV (mm3) | 240 | 180 | 120 | 120 |
| G+ (mmho) | 0.05 | 0.5 | 0.8 | 1.1 |
| G− (mmho) | 0 | 0.6 | 0.7 | 0.6 |
| ΔG (mmho) | 0.05 | −0.1 | 0.1 | 0.5 |
| Newborn 2 | ||||
| Frequency (Hz) | 226 | 630 | 800 | 1000 |
| B+ (mmho) | 0.3 | 1.01 | 1.45 | 1.8 |
| B− (mmho) | 0.25 | 0.5 | 0.8 | 1.1 |
| ΔB (mmho) | 0.05 | 0.51 | 0.65 | 0.7 |
| ΔV (mm3) | 50 | 183 | 183 | 158 |
| G+ (mmho) | 0.05 | 0.5 | 0.8 | 0.9 |
| G− (mmho) | 0.05 | 0.65 | 0.8 | 0.9 |
| ΔG (mmho) | 0 | −0.15 | 0 | 0 |
Tympanometry data are from Polka et al. (2002). B+, B−, G+ and G− are susceptance and conductance measurements at extreme positive and negative pressures. ΔB is the susceptance difference between extreme positive and negative pressures. ΔV is the equivalent-volume difference corresponding to ΔB. ΔG is the conductance difference between extreme positive and negative pressures.