Table 7 Comparison of the pass and referral rates at individual frequencies for TDH-39 supra-aural earphones and Sennheiser PXC450 noise-cancelling headphones at 30 dB HL and 25 dB HL
From: Hearing screening for school children: utility of noise-cancelling headphones
No. of ears (n=464) | No. of pass (%) | No. of refer (%) | Observed agreement | Kappa | χ 2 | p-value | Odds ratio | ||
|---|---|---|---|---|---|---|---|---|---|
TDH-39 | PXC-450 | TDH-39 | PXC-450 | ||||||
500 Hz | |||||||||
30 dB HL | 406 (87.5%) | 453 (97.6%) | 58 (12.5%) | 11 (2.4%) | 0.873 | 0.109 | N/A1 | 0.0066 | 6.29 |
25 dB HL | 335 (72.2%) | 413 (89%) | 129 (27.8%) | 51 (11%) | 0.750 | 0.245 | 34.86 | <0.0001 | 5.49 |
1000 Hz | |||||||||
30 dB HL | 463 (99.8%) | 462 (99.6%) | 1 (0.2%) | 2 (0.4%) | 0.996 | 0.004 | N/A1 | 0.0043 | ∞ |
25 dB HL | 450 (97%) | 451 (97.2%) | 14 (3%) | 13 (2.8%) | 0.950 | 0.123 | N/A1 | 0.0546 | 6.65 |
2000 Hz | |||||||||
30 dB HL | 461 (99.4%) | 462 (99.6%) | 3 (0.6%) | 2 (0.4%) | 0.998 | 0.80 | N/A1 | 0.0000 | ∞ |
25 dB HL | 461 (99.4%) | 461 (99.4%) | 3 (0.6%) | 3 (0.6%) | 0.996 | 0.75 | N/A1 | 6.0452 | ∞ |
4000 Hz | |||||||||
30 dB HL | 464 (100%) | 462 (99.6%) | 0 (0%) | 2 (0.4%) | 0.994 | 1 | N/A1 | 1 | N/A |
25 dB HL | 464 (100%) | 459 (98.9%) | 0 (0%) | 5 (1.1%) | 0.987 | 1 | N/A1 | 1 | N/A |