Research Article
Over-the-Counter Hearing Aids: A Lost Decade for Change
Table 4
OTC hearing aids: volume range and percentage of total gain at different volume control settings.
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OTC | Volume range between different volume settings (dB SPL) | Percentage of total gain at different volume settings (%) | Starting to full-on | 1/4 to full-on | 2/4 to full-on | 3/4 to full-on | 1/4 | 2/4 | 3/4 | Full-on |
| A tone N | 30 | 6 | 1 | 0 | 81 | 97 | 100 | 100 | A tone L | 27 | 6 | 1 | 0 | 78 | 97 | 100 | 100 | B | 36 | 25 | 18 | 3 | 29 | 49 | 90 | 100 | C tone N | 36 | 20 | 15 | 2 | 44 | 59 | 94 | 100 | C tone H | 36 | 22 | 15 | 3 | 40 | 57 | 93 | 100 | C tone L | 35 | 20 | 14 | 3 | 44 | 61 | 92 | 100 | D | 40 | 19 | 7 | 2 | 53 | 82 | 95 | 100 | E | 19 | 12 | 4 | 2 | 40 | 81 | 90 | 100 | F | 36 | 9 | 5 | 2 | 75 | 87 | 95 | 100 | G | 33 | 14 | 6 | 1 | 58 | 82 | 93 | 100 | H | 30 | 18 | 5 | 1 | 41 | 83 | 95 | 100 | I | 22 | 15 | 6 | 2 | 31 | 74 | 90 | 100 | J | 27 | 12 | 5 | 2 | 54 | 80 | 94 | 100 |
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