Evoked Auditory Responses in Hearing Impaired (EARH)

First Edition, February 2017

When referencing this material, please cite:

Silva I, Epstein M, Objective estimation of loudness growth in hearing-impaired listeners. J Acoust Soc Am. 2012 Jan; 131(1): 353–362. doi: 10.1121/1.3666024 [bib]
  author  = {Ikaro Silva, and Michael Epstein},
  title   = {Objective estimation of loudness growth in hearing-impaired listeners},
  journal = {Journal of the Acoustical Society of America },
  volume  = {131},
  number  = {1},
  pages   = {353–362},
  year    = {2012}

Please also include the standard citation for PhysioNet:

Goldberger AL, Amaral LAN, Glass L, Hausdorff JM, Ivanov PCh, Mark RG, Mietus JE, Moody GB, Peng C-K, Stanley HE. PhysioBank, PhysioToolkit, and PhysioNet: Components of a New Research Resource for Complex Physiologic Signals. Circulation 101(23):e215-e220 [Circulation Electronic Pages; http://circ.ahajournals.org/content/101/23/e215]; 2000 (June 13). [bib]
  author    = {Goldberger, Ary L. and Amaral, Luis A. N.
               and Glass, Leon and Hausdorff, Jeffrey M.
               and Ivanov, Plamen Ch. and Mark, Roger G.
               and Mietus, Joseph E. and Moody, George B.
               and Peng, Chung-Kang and Stanley, H. Eugene},
  title     = {{PhysioBank}, {PhysioToolkit}, and {PhysioNet}:
               Components of a New Research Resource for Complex
               Physiologic Signals},
  journal   = {Circulation},
  publisher = {American Heart Association, Inc.},
  volume    = {101},
  number    = {23},
  year      = {2000},
  month     = {June},
  pages     = {e215--e220},
  doi       = {10.1161/01.CIR.101.23.e215},
  issn      = {0009-7322},
  url       = {http://circ.ahajournals.org/content/101/23/e215}

The EARH database contains evoked auditory brainstem response (ABR) and otoacoustic emission (OAE) recordings in response to tone-burst stimuli applied across a wide range of loudness levels, in eight hearing impaired listeners.

Data Collection


Testing subjects included eight listeners (four females, four males, ages 40 to 85), with known histories of hearing impairment confirmed through clinical tests. Listeners were tested on the ear that had the lowest oudness thresholds determined through a 2-interval, 2-alternative forced-choice procedure. The choice of ear was made to ensure that measurements could be made over the maximum physical and perceptual stimulus ranges. Three listeners could not be tested at 4 kHz because their thresholds were higher than 85 dB peak-equivalent sound pressure level (peSPL). The eight subjects had the following 2-interval, 2-alternative forced-choice thresholds in their better ear, for 1 kHz and (4 kHz) stimuli in dB peSPL:

  1. Left ear 60
  2. Right ear 60
  3. Right ear 55 (60)
  4. Left ear 60 (70)
  5. Right ear 35 (65)
  6. Right ear 50
  7. Right ear 30 (35)
  8. Left ear 55 (70)
1, 2, and 6 don't have 4kHz stimuli


The tone bursts used were 1-kHz tones with 4 ms duration and 4-kHz tones with 1 ms duration. The stimuli were multiplied with a Gaussian window and then end-padded with silence to generate a stimulus length of 41.7 ms. The stimulus levels varied from 5 dB below the listener’s threshold to 100 dB peSPL in steps of 5 dB.


The stimuli were generated in MATLAB (2006b running on Ubuntu) and converted from digital (48-kHz sampling frequency) to analog using a 24-bit Lynx Two sound card. The analog signal was then passed through a Tucker-Davis Technologies HB7 headphone buffer and presented monaurally via the two transducers of the Etymotic ER-10C to a listener inside a double-walled sound-attenuating booth. During the OAE and ABR measurements, the recordings from the ER-10C were converted from analog to digital (48 kHz sampling frequency) via a Lynx Two sound card.

For more details on subjects and data collection methods, see the referenced paper.

Data Files

The data files are provided in standard WFDB format, numbered by patient number. Additional patient information is contained in the header files.


This data was contributed by Ikaro Silva.

Icon  Name                    Last modified      Size  Description
[PARENTDIR] Parent Directory - [DIR] h1/ 2017-01-30 14:41 - [DIR] h2/ 2017-01-30 14:44 - [DIR] h3/ 2017-01-30 14:46 - [DIR] h4/ 2017-01-30 14:49 - [DIR] h5/ 2017-01-30 14:53 - [DIR] h6/ 2017-01-30 14:55 - [DIR] h7/ 2017-01-30 15:00 - [DIR] h8/ 2017-01-30 15:03 - [TXT] H4_LoudnessData_F4.txt 2017-01-30 16:03 154 [TXT] H5_LoudnessData_F4.txt 2017-01-30 16:03 162 [TXT] H8_LoudnessData_F4.txt 2017-01-30 16:03 166 [TXT] H2_LoudnessData_F1.txt 2017-01-30 16:03 176 [TXT] H1_LoudnessData_F1.txt 2017-01-30 16:03 193 [TXT] H3_LoudnessData_F4.txt 2017-01-30 16:03 206 [TXT] H6_LoudnessData_F1.txt 2017-01-30 16:03 292 [TXT] H7_LoudnessData_F4.txt 2017-01-30 16:03 331 [TXT] Listener_MetaData.txt 2017-01-30 16:03 574

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Updated Friday, 28 October 2016 at 16:58 EDT

PhysioNet is supported by the National Institute of General Medical Sciences (NIGMS) and the National Institute of Biomedical Imaging and Bioengineering (NIBIB) under NIH grant number 2R01GM104987-09.