Table 3. Case Study 1: Estimated audiogram at diagnosis, in decibels of hearing level (dB HL).

	Frequency (Hz)
	500	1,000	2,000	4,000
Right	90	95	100	105
Left	90	95	100	105

Resulting estimated audiogram (in decibels of hearing level (HL) using decibels of normal hearing level (nHL) to decibels of HL correction, derived from Vander Werff et al.³⁹ The values in Table 2 are corrected by −10, −5, 0, and +5 dB for frequencies 0.5, 1, 2, and 4 kHz, respectively, to convert from decibels of nHL to decibels of HL.