Determination of backup alarm masked threshold in construction noise

Details

• Personal Author:
  Muchenje LS
• Description:
  Sound transmission devices have advanced filtering abilities that theoretically protect the ear from harmful Masking noise while amplifying the sounds that need to be heard, such as backup alarms. Therefore, such devices should provide improved signal detection in noise when compared to their passive counterparts. The masked threshold of a vehicular backup alarm was determined for audiometrically normal and non-normal hearers using two types of sound transmission devices and their passive counterparts within pink noise and milling machine noise at intensities of 75, 85, 95 and 105 dBA. Results indicated that the sound transmission devices did not have any statistically significant advantages over the passive devices with respect to masked threshold of a backup alarm. Therefore, it cannot be concluded that these devices offer advantage over similar passive devices with respect to signal detection. Additionally, ratings of comfort and the ability to detect the alarm for each device were gathered. Both scales did not show any significant differences between the two device types. [Description provided by NIOSH]
• Subjects:
  Construction Industry Hearing Loss, Noise-Induced Noise Noise, Occupational Occupational Health Personal Protective Equipment Safety
• Keywords:
  Construction Construction-industry Noise-control Noise-exposure Noise-induced-hearing-loss Noise-levels Noise-protection Noise-shielding Noise-sources Personal-protection Personal-protective-equipment Sound

  More +
• Publisher:
  Virginia Polytechnic Institute and State University
• Document Type:
  Text
• Funding:
  Cooperative Agreement
• Genre:
  Dissertation
• Place as Subject:
  OSHA Region 3 ; Virginia
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  1-120
• NIOSHTIC Number:
  nn:20043457
• Citation:
  Blacksburg, VA: Virginia Polytechnic Institute and State University, 2008 May; :1-120
• Federal Fiscal Year:
  2008
• Performing Organization:
  Virginia Polytechnic Institute and State University
• Peer Reviewed:
  False
• Start Date:
  20040915
• Source Full Name:
  Determination of backup alarm masked threshold in construction noise
• End Date:
  20100630
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:1870c330cf19a8adab00b020592c469d6bf0b898a0d1246a8a40bc99a8f82730cd316403126f6f4aabf480ca2266fcd30c13b43c75bc80ee34a47917edd4b78b
• Download URL:
  https://stacks.cdc.gov/view/cdc/195347/cdc_195347_DS1.pdf
• File Type:
  [PDF - 3.45 MB ]