A review of the perceptual effects of hearing loss for frequencies above 3 kHz

Figures & data

Table 1. Illustration of the two-pass method of Lutman et al (2016) for estimating the noise-induced component of hearing loss for a hypothetical case of a 55-year-old man.

Lutman et al 2016 method					Frequency
Pass 1		1.0	2	3	4	6	8
Hearing threshold level (HTL), dB HL		10.0	10.0	15.0	50.0	45.0	35.0
HTL at selected anchor points		10.0					35.0
Selected age-associated hearing loss (AAHL)		7	13	19	28	32	38	55at50
Misfit values (dB)		3.0					−3.0
Interpolated misfit values (dB)		3.0	1.0	0.0	−1.0	−2.0	−3.0
Age adjusted AAHL		10.0	14.0	19.0	27.0	30.0	35.0
Bulge (dB)		0.0	4.0	4.0	23.0	15.0	0.0
Pass 2
Modified HTL at anchor points (dB)		6.5					25.8
Selected age-associated hearing loss (AAHL)		7	13	19	28	32	38	55at50
Misfit values (dB)		−0.5					−12.2
Interpolated misfit values (dB)		−0.5	−4.3	−6.3	−8.3	−10.2	−12.2
Modified AAHL (dB)		6.5	8.7	12.7	19.7	21.8	25.8
Modified bulge = noise-induced loss (dB)		3.5	1.3	2.3	30.3	23.2	9.2
Mean noise-induced loss 1, 2 and 3 kHz	2.4
Mean noise-induced loss 1, 2 and 4 kHz	11.7

Table 2. Calculated values of the SII for a hypothetical case, based on the estimated age-associated hearing loss (AAHL) and the actual hearing loss for three listening situations. The difference between the two SII values for a given situation represents the decrease in SII resulting from the noise-induced component of the hearing loss.

		Situation
	Speech in quiet at 65 dB SPL	Speech in quiet at 50 dB SPL	Speech at 65 dB SPL in noise at 0 dB SNR
SII for AAHL	0.95	0.81	0.39
SII for actual hearing loss	0.81	0.71	0.31
Difference	0.14	0.10	0.08
Difference in percent	15%	12%	21%

Lutman M.E., Coles R.R. & Buffin J.T. 2015. Guidelines for quantification of noise-induced hearing loss in a medicolegal context. Clin Otolaryngol, 41, 347–357.

 Web of Science ®Google Scholar