Table 1.
Participant demographics.
| Tin500 Hz group | Cont500 Hz group | Tinn5 kHz group | Cont5 kHz group | |
|---|---|---|---|---|
| Characteristics of participants | ||||
| Number (male) | 17 (10) | 16 (5) | 11 (7) | 11 (8) |
| Age in years, mean (SE) | 62.0 (3.31) | 62.0 (2.29) | 48.6 (4.75) | 53.9 (5.86) |
| Age range in years | 22–77 | 42–74 | 22–68 | 22–76 |
|
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| Audiometric Data | ||||
| Mean (SE) threshold @ 500 Hz (dB HL) | 10.6 (3.49) | 11.9 (2.90) | 8.0 (2.56) | 10.5 (2.88) |
| Mean (SE) threshold @ 1 kHz (dB HL) | 18.4 (3.76) | 13.1 (3.25) | 7.9 (2.70) | 10.7 (3.67) |
| Mean (SE) threshold @ 2 kHz (dB HL) | 24.5 (4.24) | 12.5 (3.97) | 9.8 (3.65) | 13.6 (3.61) |
| Mean (SE) threshold @ 5 kHz (dB HL) | 43.8 (5.04) | 33.3 (5.19) | 28.5 (6.24) | 25.7 (7.01) |
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| Sound levels | ||||
| Standard for matching | 1 kHz pure tone 65 dB SL | 1 kHz pure tone 65 dB SL | 2 kHz 40 Hz AM tone at 65 dB SPL | 2 kHz 40 Hz AM tone at 65 dB SPL |
| Mean (SE) stimulus intensity (dB SPL) | 81.2 (1.68) | 78.7 (2.90) | 60.0 (2.05) | 58.5 (2.01) |
| Stimulus intensity range (dB SPL) | 69–93 | 47–93 | 50–74 | 40–66 |
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| Tinnitus characteristics | ||||
| Mean (SE) duration in years | 12.5 (2.68) | 11.7 (3.03) | ||
| Mean (SE) loudness rating Borg CR100 scale | 44.8 (5.62) | 57.1 (6.21) | ||
| Mean (SE) loudness match (1 kHz tone, dB SPL) | 36.7 (9.05) | 53.9 (6.32) | ||
| THQ Mean Total Score (SE) | 32.5 (5.64) | 48.9 (6.66) | ||
| Tinnitus bandwidth (number of participants) | ||||
| Tonal | 12 | 6 | ||
| Ringing | 2 | 2 | ||
| Hissing | 3 | 3 | ||
| Tinnitus ear | ||||
| Bilateral | 15 | 11 | ||
| Left | 1 | 0 | ||
| Right | 1 | 0 | ||