Aging and exposure to loud sounds for a long period can cause damage to the ear and hearing loss. Other factors, such as birth defects, birth defects, chronic ear infections, an injury to the ear, excessive earwax, can temporarily reduce how well your ears conduct sounds. Audiometry tests are conducted to check one’s ability to hear sounds based on the intensity (loudness) and tone (speed of sound wave vibrations).
Hearing loss categories used by most hearing professionals:
- Normal hearing (0-25 dB HL)
- Mild hearing loss (26-40 dB HL)
- Moderate hearing loss (41-70dB HL)
- Severe hearing loss (71-90 dB HL)
- Profound hearing loss (greater than 91 dB HL)