It's not a good idea to try, but I don't see any reason why it's not possible. Plenty of times, people get setbacks from far less.
Occlusion effect SPLs vary in amplitude between patients from as little as 5–9dB to 25–32dB, with peaks at different frequencies (Fulton & Martin, 2006; Killion et al., 1988; Mueller et al., 1996).
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