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The word noise is derived from the Latin word "nausea " meaning impulsive, unwanted, and unpleasant. Summary: Doing some wire twisting to update a pair of wire earrings to yourself or a gift to your friends. If your suggestion is adopted, you will get some additional presents, such as cash coupon, free gifts, discount code, etc. If you have specific questions about your orders, please contact Nbeads Customer Service or go to our Help Center. Noise pollution can be defined as any unwanted electromagnetic signal that produces a jarring or displeasing effect and which interferes with human communication, comfort and feeling of well-being. Quick statistics, National Institute on Deafness and Other Communication Disorders (NIDCD). Noise-induced hearing loss (NIHL) is the most common cause of sensorineural hearing loss (SNHL). NIHL is one of the most common workplace disorders and the second most self-reported occupational injury.
In US alone, thirty million workers are at risk for NIHL, and 22 million American adults ages 20-69 already have it.
By the age 25, the average carpenter has the same hearing as a 50-year-old person who does not work around hazardous noise. World Health Organization estimated 360 million individuals in the world with disabling hearing loss, out of which 91% are adults, and only 9% are children. National Institute on Deafness and Other Communication Disorders estimates that 15% of the population has got decreased hearing due to loud noise that may be noise at work, leisure activity or use of mobile phone only. However, a repeated or sustained exposure of noise to the hair cells and associated nerve fibers leads on to degenerative changes and the TTS becomes permanent threshold shift (PTS).

The effect of excessive noise could be so devastating that it can cause permanent memory loss or psychiatric disorder.
There are many hypothesis that include mechanical injury from basilar membrane motion, metabolic exhaustion, activity induced ischemia and ionic poisoning from breaks in the cell membrane.Noise-induced hearing loss is 100% preventable, but once you have hearing loss, you'll have it for life. These structures can be injured instantly from an intense, brief impulse, such as the explosion of a firecracker, [10] or gradually from continuous exposure to noise, such as in a woodworking shop.Noise exposure can cause two kinds of health effects. Nonauditory effects include stress-related physiological and behavioral effects, and safety concerns.
Auditory effects include hearing impairment resulting from excessive noise exposure and tinnitus. The hearing impairment is noticeable only when it is substantial enough to interfere with routine activities. As the employee ages, hearing may worsen as "age-related hearing loss" adds to the existing NIHL. This loss, usually, is permanent and is not satisfactorily cured by medicines or any devices such as, hearing aids. There is focal loss of hair cells and degeneration of nerve terminals.We should protect hearing of our children as voice development is dependent upon proper hearing of a child.
In conductive deafness sound-pressure waves are unable to reach the cochlea due to external ear canal blockage, ruptured tympanic membrane (TM) or a defect in the ossicles of the middle ear.The function of middle ear structures (TM, malleus, incus, and stapes) is to convert ear pressure changes into the vibrations of the inner ear fluids.
During sound transmission through the middle ear, the tensor tympani and the stapedius muscles play an important role in inner ear protection from high-intensity acoustic stimuli of moderate frequencies.Sensorineural hearing loss can be noise-induced or increasing age-related. The pathology in NIHL lies with the outer hair cells of the cochlea causing interference in the mechano-electrical transduction. The organ of Corti is the site for mechano-electrical transduction of the sound signal as this organ contains hair cells and supporting cells. Other hypotheses for NIHL include nerve rootlet damage by overstimulation from outer hair cell, over secretion of glutamate or cellular damage from glutathione depletion.

Sensorineural deafness by virtue of acoustic trauma is more common type of loss in teenagers today listening to loud rock music.Hazardous sound levels are louder than 80 dB. The degree of a hearing hazard is related to both the level of the noise and the duration of the exposure.
If the level of noise in your workplace averages 85 dB, you are at risk for NIHL after 8 h of exposure. Remember - the greater the noise level, the less time before hearing damage can occur [Table 3]. HCPs feature a number of components included sound management, engineering and administrative controls, audiometric monitoring, and use of personal hearing protection. Understanding of the process, evaluation and treatment of NIHL is of vital importance to the practicing otorhinolaryngologists.
Organic solvent seeks special mention as they are two-fold harmful one as in manufacturing unit second as a consumer as it is used in detergents, medicines, perfumes, fabric, paper coating and laser printing inks and insect repellents. In environmental problems leading to health hazards, noise is the easiest to control but awareness among the public and strict regulatory authority is required. No concrete efforts have been made to decrease the intensity of sound (noise) in the industrial area even the manufacture are not made aware to decrease the noise level of industrial machines.
We must remember with increase in life span after 10 years we will be having more than 18% citizens and up to 40% above the age of 75 years having disabling deafness all the more out of which only 20% will be benefited by hearing aids hence we have to take all precaution and necessary measures to prevent all preventable or avoidable type of hearing loss especially taking care of noise pollution.Start protecting your ears now by avoiding noise pollution and hearing relaxing technique yoga.

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