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What is considered normal hearing?
Normal hearing sensitivity is defined as thresholds that range from 10dB to +20dB. Thresholds falling out of this range are considered abnormal or consistent with some degree of hearing loss. Hearing loss has degrees of severity based on the dB range where air thresholds are found. The following degrees of hearing impairment are based on specific dB ranges:
| Degree of Loss | Range in dB |
|---|---|
| Normal | -10 to 19 |
| Mild | 20 to 39 |
| Moderate | 40 to 59 |
| Severe | 60 to 79 |
| Profound | 80 to 110 |
