Acoustic requirements for audiometric testing and hearing protector fit-testing with mobile platforms

Details

• Personal Author:
  Murphy, William J.
• Description:
  Mobile technology platforms present new challenges for implementing hearing loss prevention programs. Laptop computers, smartphones, and tablets have capabilities to generate 16-bit and sometimes 24-bit audio stimuli for hearing tests. For testing hearing at threshold, the noise floor of the sound card of the computer can pose a limitation. During the development of sound compression standards (e.g., MPEG, AAC, MP3), 24-bit resolution and 96 kHz sampling is necessary to encompass the requirements for dynamic level the frequency range of human hearing. However, hearing screening and fit-testing can be accomplished with 44 kHz sampling rates. However, the bit resolution deserves careful treatment to ensure that output is accurate. This paper will describe features for mobile applications for audiometric testing and hearing protector fit-testing. Several external DAC platforms on Windows 7 based laptops along with a small sample of iOS and Android devices have been tested and demonstrate differing levels of performance. Linearity of the systems and output levels for a standard audiometric headphone will be presented. [Description provided by NIOSH]
• Subjects:
  Noise Noise, Occupational Occupational Health Safety
• Keywords:
  Analytical-instruments Analytical-processes Auditory-system Hearing-level Measurement-equipment Noise-exposure Noise-frequencies Noise-levels Noise-measurement Noise-pollution Sound Sound-attenuation

  More +
• ISSN:
  0001-4966
• Document Type:
  Text
• Genre:
  Abstract or Summary
• Place as Subject:
  Ohio ; OSHA Region 5
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  DART - Division of Applied Research and Technology
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  137
• Issue:
  4
• NIOSHTIC Number:
  nn:20049190
• Citation:
  J Acoust Soc Am 2015 Apr; 137(4)(Pt 2):2292
• Contact Point Address:
  William J. Murphy, (Hearing Loss Prevention Team, Centers for Disease Control and Prevention, National Inst. for Occupational Safety and Health, 1090 Tusculum Ave., Mailstop C-27, Cincinnati, OH 45226-1998
• Email:
  wjm4@cdc.gov
• Federal Fiscal Year:
  2015
• NORA Priority Area:
  Construction ; Manufacturing
• Peer Reviewed:
  True
• Part Number:
  2
• Source Full Name:
  Journal of the Acoustical Society of America
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:42619e8d60abb8292e2c54deb6dd612a04dd41d1d55b4b63146448cfe3da61200164c03cd6a8a289bfdfa76b7c287a9a988ccb2af699a058b79c8f615df9935f
• Download URL:
  https://stacks.cdc.gov/view/cdc/203724/cdc_203724_DS1.pdf
• File Type:
  [PDF - 145.00 KB ]