英文字典,中文字典,查询,解释,review.php


英文字典中文字典51ZiDian.com



中文字典辞典   英文字典 a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z       


安装中文字典英文字典辞典工具!

安装中文字典英文字典辞典工具!










  • Understanding Noise Exposure Limits: Occupational vs. General . . .
    NIOSH establishes recommended exposure limits (RELs) to protect workers against the health effects of exposure to hazardous substances and agents encountered in the workplace These NIOSH limits are based on the best available science and practices
  • Understand Noise Exposure | Noise and Hearing Loss | CDC
    Occupational noise measurements are usually reported in the following ways: Sound level is the noise level measurement at a given point in time Time Weighted Average (TWA) is sound level averaged over an eight-hour period Noise dose is the percent of allowable noise exposure a worker can have
  • Occupational Noise Exposure - Overview | Occupational Safety . . .
    A wide variety of noise sources may exist in the workplace The NIOSH Sound Level Meter App is a tool to measure sound levels in the workplace and provide noise exposure parameters to help reduce occupational noise-induced hearing loss
  • Occupational Hearing Loss from Non-Gaussian Noise - PMC
    Noise levels are truly continuous in relatively few occupations, with some degree of intermittency the most common condition The sound levels of intermittent noise are often referred to as non-Gaussian in that they are not normally distributed in the time domain
  • Comparison of Occupational Noise Exposure Assessment Methods . . .
    The hybrid method (a combination of task-based, subjective rating, and trade mean measurements) was the best alternative to full-shift personal noise-dosimetry with a negligible bias of 0 1 dB, precision of 2 4 dBA, and accuracy of 2 4 dBA
  • Understanding noise exposure limits: Occupational vs . . . - ISHN
    Occupational noise exposures represent an important but under-recognized cause of disease and disability in the United States Now titled as Audible Sound, the ACGIH® Threshold Limit Values for Physical Agents (TLV®-PA) Committee has proposed a revision to the TLV® for Noise


















中文字典-英文字典  2005-2009