Table 2: Frequency specific thresholds of N4 and N6 standard audiograms [39]. The threshold at 750 Hz for the N6 audiogram was originally 82.5 dB HL but had to be rounded to 85 dB HL to allow input into the verification system.

AudiogramFrequency specific thresholds (dB HL)
2505007501 kHz1.5 kHz2 kHz3 kHz4 kHz6 kHz

N4555555556065707580
N675808585909095100100