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Organization and Management of a Laser Safety Program
Published in Kenneth L. Miller, Handbook of Management of Radiation Protection Programs, 2020
The American Conference of Governmental Industrial Hygienists (ACGIH) has issued threshold limit values (TLVs) for noise levels.33 Ear protection should be worn when an individual may be exposed to noise levels above 90 dB for 8 hr a day. For periods less than 15 min, permissible noise levels can be as high as 115 dB.
Magnetic Resonance Imaging
Published in Suzanne Amador Kane, Boris A. Gelman, Introduction to Physics in Modern Medicine, 2020
Suzanne Amador Kane, Boris A. Gelman
The loud noises characteristic of MRI scanners have their origin in forces created by the constantly switching field gradients. Interactions between moving charges within a current-carrying wire and the magnetic field generate a force on the wire with the orientation shown in Figure 8.22a. (The same effect is used to generate motions in electric motors and loudspeakers.) A gradient coil with current flowing in the direction shown in Figure 8.22b experiences forces pointing radially outward, and these forces abruptly change as the gradients are quickly switched on and off many times a second. Sound is generated as the coils flex in response to the changing forces. Ear protection, such as headphones or earplugs, and piped-in music can help patients screen out the associated noise.
Micronutrients in Prevention and Improvement of the Standard Therapy in Hearing Disorders
Published in Kedar N. Prasad, Micronutrients in Health and Disease, 2019
Although physical ear protection devices can reduce the impact of noise and vibration somewhat, the energy generated from high levels of noise intensity and vibration can penetrate the inner ear to cause damage to hair cells. Physical protection of the ear plays no role in chemical-induced or ARHL. Some individuals, such as troops in combat, musicians, or industrial workers do develop varying degree of hearing loss despite physical ear protection. There is no biological protection strategy to reduce the risk of hearing loss. The development of such a strategy may compliment the physical ear protection devices in the prevention of hearing disorders.
The effect of occupational training provided to workers in a glass factory on their use of ear protectors
Published in International Journal of Occupational Safety and Ergonomics, 2023
Akgün Yeşiltepe, Gülendam Karadağ
As a result of the study, it was determined that the occupational training provided to workers increased the level of hearing health-related knowledge and use of ear protection. Also, it was determined that there is a difference in the level of knowledge and behavior of workers according to time, which affected their noise-related health symptoms. Regular trainings should be organized to encourage the use of ear protection for workers working in noisy workplaces. Regular training should be given by occupational health nurses on health risks and preventive measures. Occupational health nurses should increase the frequency of periodic health examinations and follow-up aimed at the hearing health of workers working in noisy workplaces. Similar studies should be conducted with experimental control groups and randomized controlled research designs in different sample groups. Hanging signs and notices should be available to encourage the use of ear protectors in noisy workplaces.
Cut-off score of the Khalfa Hyperacusis Questionnaire with 10 selected items
Published in International Journal of Audiology, 2022
Hiroyuki Yamada, Toru Ishikawa, Naoki Oishi, Kaoru Ogawa
We examined the cause of the low factor loadings of the four items (1, 5, 6, and 11) by assessing the floor and ceiling effects and comparing the correlation coefficient with other items. Among them, items 1 and 6 had extreme floor effects. Item 1 was “Do you ever use earplugs or earmuffs to reduce your noise perception?” and item 6 was “Has anyone you know ever told you that you tolerate noise or certain kinds of sound badly?” Fackrell et al. (2015) considered that population factors (tinnitus-specific) could contribute to the reasons. Within a tinnitus population, using ear protection is not recommended but sound therapy and exposure to moderate levels of background noise are encouraged in the management of tinnitus (Fackrell et al. 2015). In this study, the population consisted of patients with hyperacusis (with or without tinnitus). Therefore, our population may have had the same reasons as items 1 and 6 for demonstrating floor effects. In addition, patients with hyperacusis may know, from experience that ear protection is not helpful in reducing the distress of hyperacusis, and that symptoms may even worsen after removing the protection.
A Delphi survey to determine a definition and description of hyperacusis by clinician consensus
Published in International Journal of Audiology, 2021
Bethany Adams, Magdalena Sereda, Amanda Casey, Peter Byrom, David Stockdale, Derek J. Hoare
Statements that reached the highest level of agreement to be the best descriptors of hyperacusis were “A reduced tolerance to sound(s)” (90.9%) and “An increased sensitivity to sound(s)” (78.8%). Many statements that could either “Always” or “Sometimes” describe hyperacusis reached consensus. There was 81.8% agreement that “Hyperacusis can always cause an abnormal response to normal sound(s)”. Eight further statements on which consensus was reached were that hyperacusis can sometimesImpact a person’s relationship (93.9% agreement).Cause a person to use ear protection, such as ear plugs or earphones (97% agreement).Reduce a person’s confidence (93.9% agreement).Cause poor concentration (87.9% agreement).Cause a person to withdraw from social situations (81.9%agreement).Limit the daily activities of a person (84.8% agreement).Cause a person to avoid social situations (78.8% agreement).Disrupt daily functioning (78.8%).