Measurement of Hearing Thresholds

Hearing data were collected by pure tone audiometry, a measure of peripheral auditory system sensitivity. Pure tone air conduction thresholds in each ear were obtained in decibels hearing level (db HL) at standard octaves from 0.5 to 8 kHz using insert earphones (EARTone 3a; 3 M, St. Paul, Minnesota) and an Interacoustics AD629 audiometer (Interacoustics A/S, Assens, Denmark) by a trained technician in a sound‐attenuating booth meeting American National Standard Institute standards.
³⁹ (link) A speech frequency pure‐tone average (PTA) at thresholds 0.5, 1, 2, and 4 kHz was calculated for each ear, and hearing impairment was defined by PTA > 25 dB HL in the better‐hearing ear consistent with American Speech‐Language‐Hearing Association guidelines.
⁴⁰ (link)

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Sayyid Z.N., Wang H., Cai Y., Gross A.L., Swenor B.K., Deal J.A., Lin F.R., Wanigatunga A.A., Dougherty R.J., Tian Q., Simonsick E.M., Ferrucci L., Schrack J.A., Resnick S.M, & Agrawal Y. (2024). Sensory and motor deficits as contributors to early cognitive impairment. Alzheimer's & Dementia, 20(4), 2653-2661.

Publication 2024

EARTone 3a AD629 audiometer

Corresponding Organization :

Other organizations : Johns Hopkins University, University of Pittsburgh, National Institute on Aging

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Variable analysis

independent variables

None explicitly mentioned

dependent variables

Pure tone air conduction thresholds in each ear (in decibels hearing level, dB HL) at standard octaves from 0.5 to 8 kHz
Speech frequency pure-tone average (PTA) at thresholds 0.5, 1, 2, and 4 kHz for each ear
Hearing impairment defined by PTA > 25 dB HL in the better-hearing ear

control variables

Use of insert earphones (EARTone 3a; 3M, St. Paul, Minnesota)
Use of an Interacoustics AD629 audiometer (Interacoustics A/S, Assens, Denmark)
Measurements performed by a trained technician
Measurements conducted in a sound-attenuating booth meeting American National Standard Institute standards

positive controls

None explicitly mentioned

negative controls

None explicitly mentioned

Annotations

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