Table 1.

Number of ears in each hearing loss category by audiometric frequency. Normal hearing was defined as ≤20 dB HL, mild hearing loss as thresholds between 21 and 40 dB HL, moderate between 41 and 60 dB HL, severe between 61 and 80 dB HL, and profound as thresholds greater than 80 dB HL.

	Normal	Mild	Moderate	Severe	Profound
750 Hz	112	38	29	10	9
1000 Hz	112	35	31	10	10
1500 Hz	95	46	34	10	13
2000 Hz	83	43	46	12	14
3000 Hz	76	40	55	13	14
4000 Hz	70	33	56	22	17
6000 Hz	67	33	52	27	19
8000 Hz	68	29	51	32	18