A History of Temporary Threshold Shift (TTS) Research

Details

• Personal Author:
  Davis R ; Themann, Christa L.
• Description:
  We all have experienced the loss of hearing sensitivity upon exposure to loud sounds that resolves over hours or days. It is probable that those during the early days of man also experienced temporary threshold shifts. The advent of electronics in the early 20th century allowed for reproducible presentation of a sound stimulus. This sound stimulus level could be manipulated allowing for reliable measurement of Temporary Threshold Shifts (TTS) and Permanent Threshold Shifts (PTS) and ultimately led to the clinical audiometer. Electronics also allowed for noise exposures to be presented in the loudness range where TTS and PTS could be carefully studied in the laboratory. As purposely creating PTS in humans is unethical, studies of TTS and Asymptotic Threshold Shift (ATS, a TTS that grows over 6-12 hours of noise exposure) became the foundation for rules and regulations designed to prevent Permanent Threshold Shift. This research was later used to develop occupational and environmental noise limits. Later studies indicated that TTS was not a good predictor of PTS, and the research fell out of favor. Recently, TTS research has experienced a resurgence, as advanced imaging techniques allow study of specific underlying mechanisms and challenge previous assumptions about threshold shift. This poster will review seminal research on TTS beginning with World War II. [Description provided by NIOSH]
• Subjects:
  Hearing Hearing Loss Hearing Loss, Noise-Induced Noise Noise, Occupational Occupational Health Safety
• Keywords:
  Auditory System Hearing Impairment Hearing Loss Hearing Threshold Noise Exposure Threshold Shift
• ISSN:
  0742-3152
• Publisher:
  Association for Research in Otolaryngology
• Document Type:
  Text
• Genre:
  Abstract or Summary
• Place as Subject:
  Maryland ; Ohio ; OSHA Region 3 ; 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
• Pages in Document:
  17
• Volume:
  38
• NIOSHTIC Number:
  nn:20061060
• Citation:
  Abstr Midwinter Res Meet Assoc Res Otolaryngol 2015 Feb; 38:17
• Federal Fiscal Year:
  2015
• Peer Reviewed:
  False
• Source Full Name:
  Abstracts of the 38th Midwinter Research Meeting of the Association for Research in Otolaryngology, Febuary 21-25, 2015, Baltimore, Maryland
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:b26fef9a1d42b5c673514ca7ee64db83435aeca76a8900c9d76cfc361f9ea262818a61c6f3419752af175d7acf531c212ce9b37e819e1c8653ec0e55bcbe9eba
• Download URL:
  https://stacks.cdc.gov/view/cdc/224738/cdc_224738_DS1.pdf
• File Type:
  [PDF - 867.41 KB ]