Table 2 Mean pure tone thresholds (dB HL) for both study and control groups
From: Auditory fatigue among call center operators with headset
Freq. (Hz) | Study group Mean + SD dB HL | Control group Mean + SD dB HL | t value | p |
|---|---|---|---|---|
250 | 12.14 ± 6.31 | 11.00 ± 5.91 | 0.898 | 0.372 |
500 | 11.16 ± 4.37 | 11.13 ± 4.16 | 0.040 | 0.968 |
1000 | 11.52 ± 3.92 | 12.13 ± 3.90 | 0.749 | 0.456 |
2000 | 12.23 ± 4.94 | 12.63 ± 5.06 | 0.380 | 0.705 |
4000 | 14.77 ± 6.67 | 12.88 ± 5.76 | 0.082 | 0.935 |
8000 | 18.91 ± 3.57 | 15.00 ± 6.30 | 0.067 | 0.947 |