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  1. NLM Digital Collections - Papers and Proceedings of the Surgeon General's Conference on Agricultural Safety and Health 
    Publication: Centers for Disease Control (U.S.), September 1992
    resource.nlm.nih.gov/101584932X365
    ... differences in the 3,000 to 8,000 Hz range, again where you might expect noise exposure to start showing. The 50-year-old group had signif- icant differences at ...
  2. NLM Digital Collections - Papers and Proceedings of the Surgeon General's Conference on Agricultural Safety and Health .... 
    Publication: National Institute for Occupational Safety and Health, September 1992
    resource.nlm.nih.gov/101584932X378
    ... differences in the 3,000 to 8,000 Hz range, again where you might expect noise exposure to start showing. The 50-year-old group had signif- icant differences at ...
  3. NLM Digital Collections - Proposal for a Genetics Research Center (pages 51-75) 
    Publication: Produced: 1 June 1973
    resource.nlm.nih.gov/101584906X17936
    ... Efficiencies Typical Operation Condition: Scan from m/e 50 to 500 in 4500 ... of n ions/msec) bandwidth, Hz ions; bandwidth Control and integrate 8 N/A ...
  4. NLM Digital Collections - Proposal for a Genetics Research Center 
    Publication: Produced: 1 June 1973
    resource.nlm.nih.gov/101584906X17932
    ... Efficiencies Typical Operation Condition: Scan from m/e 50 to 500 in 4500 ... of n ions/msec) bandwidth, Hz ions; bandwidth Control and integrate 8 N/A ...
  5. Audiometry 
    https://medlineplus.gov/ency/article/003341.htm
    ... 000 Hz. Some animals can hear up to 50,000 Hz. Human speech is usually 500 to 3,000 ...
  6. Results - Effectiveness of Cochlear Implants in Adults with Sensorineural Hearing Loss - NCBI Bookshelf 
    https://www.ncbi.nlm.nih.gov/books/NBK285772
    ... performance using disyllabic words in both quiet and noise conditions. 50 Bilateral listening versus the better ear (unilateral condition) ... tone acoustic thresholds of 125, 250, and 500 Hz. 62 Subjects displayed speech recognition in noise when residual hearing was preserved to levels no ...
  7. NLM Digital Collections - Additions to the Materia medica pura 
    Publication: New-York : William Radde ...; London : H. Balliere ..., 1846
    resource.nlm.nih.gov/61820550R
    ... third (Hz. 3), 30 drops for the fourth (Hz. 4), 50 drops for the fifth (Hz. 5), and one ... Hk. 3). Dizziness and dulness in the forehead (Hz. 2, 3). 50. Violent, drawing, tearing pain in the forehead, in ...
  8. NLM Digital Collections - Cytochemical Studies of Planetary Microorganisms: Explorations in Exobiology 
    Publication: Produced: [April - September 1968]
    resource.nlm.nih.gov/101584906X15560
    ... peak heights of coherent noises (i.e., 60 hz and induced noises of the digital interface). The borad band Johnson ... of detecting orifice P = resistivity of the medium (~ 50 ohm-cm for normal saline) ... current of 0.4 ma the noise level of the apparatus was equivalent to a ...
  9. DFNA2 Nonsyndromic Hearing Loss - GeneReviews® - NCBI Bookshelf 
    https://www.ncbi.nlm.nih.gov/books/NBK1209
    ... a characteristic downsloping audioprofile with hearing thresholds between 50 and 90 dB at 500 Hz and between 90 and 120 dB at 2-4 kHz by age 50 years. A typical audiogram of an adolescent with ...
  10. Reference list - Hearing loss in adults - NCBI Bookshelf 
    https://www.ncbi.nlm.nih.gov/books/NBK536543
    ... by internet, part 2: improving test sensitivity for noise-induced hearing loss. International Journal of Audiology. 2011; 50(11):835–48 [ PubMed : 21970351 ] 328. Leensen MC, ...
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