According to Martini , air. Although, there is always sound in nature, we do not the definition of hearing loss is not the same for hear all of them Bhouyain, Sound is a kind of everybody and the different degrees of hearing loss are energy and the unit used to measure the intensity of divided into categories. The most common categories of sound level is called dBell. E-mail: ambhouyain yahoo. Author s agree that this article remain permanently open access under the terms of the Creative Commons Attribution License 4.
Temporary hearing loss This is also known as temporary threshold shift TTS Mild hearing loss which occurs immediately after exposure to a high level of noise. There is gradual recovery when the affected On average, the quietest sounds that people can hear person spends time in a quiet place.
Complete recovery with their better ear are between 25 and 40 dB. People may take several hours. Permanent hearing loss Permanent hearing loss, also known as permanent Moderate hearing loss threshold shift PTS , progresses constantly as noise exposure continues month after month and year after On average, the quietest sounds heard by people with year.
The hearing impairment is noticeable only when it is their better ear are between 40 and 70 dB. People who substantial enough to interfere with routine activities.
At suffer from moderate hearing loss have difficulty keeping this stage, a permanent and irreversible hearing damage up with conversations when not using a hearing aid.
Noise-induced hearing damage cannot be cured by medical treatment and worsens as noise exposure continues. Severe hearing loss Though sound pollution is a serious matter, at the same time it is a threat to human health Cohen et al. People who None or very few works has been performed on suffer from severe hearing loss will benefit from powerful this aspect Bhouyain and Uddin, All industrial hearing aids, but often, they rely heavily on lip-reading areas are generally situated near residential areas in even when they are using hearing aids.
Some also use Bangladesh. Moreover, people established industries sign language. So, noise pollution is becoming a daily problem nowadays, and every day in newspaper Profound hearing loss editorial column, is this aspect is written.
Therefore, an attempt was taken to measure the sound and observe its On average, the most quiet sounds heard by people with impact on the human health. People who The main objectives of the present study are as follows: suffer from profound hearing loss face difficulty in hearing and rely mostly on lip-reading, and sign language. To identify the sources of noise pollution in Chittagong.
According to Canadian Centre for Occupational Health 2. These effects are non-auditory 3. To identify any adverse effect on hearing faced by the and auditory effects. Non-auditory effects include stress, workers of the mill. To find out the relationship between noise pollution concerns.
Auditory effects include hearing impairment and its impact on hearing capacity. Noise-induced 5. A case study was conducted on randomly selected 12 permanent hearing loss is the main concern related to workers of Amin Jute Mills Ltd and 12 workers of Gul occupational noise exposure.
The main auditory effects Ahmed Jute Mills Ltd to evaluate the adverse effect of include: noise on hearing. Chittagong is the second largest city of Bangladesh with a substantial, self-sustaining economic base. Different types of industries have grown there due to different reasons. Moreover, there are specific zones for industrial and residential growth in Tinnitus Chittagong.
All mills and factories produce noise. It is also true for jute mills as well. When the machine runs it produce sound which is Ringing or buzzing in the ear. Amin Jute Mills Ltd. Gul Ahmed Jute Mills Ltd. In June, Amin Jute Mills by sound level meter, once in every month according to their working period, that is, two persons in from May to July, ; and in Gul Ahmed Jute Mills from each group.
Then, another group of two normal persons maximum and minimum noise levels were August to September, The measuring spots were without working experience were selected and added recorded as 81 and 75 dB in main gate Table 1. They were used as In July, maximum and minimum noise levels were the mills, inside the mills and near the siren. View 7 excerpts, cites background and methods. Assessment of noise pollution in friendship textile mill limited, Ubongo —Dar es Salaam.
Abstract Most of the textile industries in developing countries like Tanzania are facing a big problem of noise pollution. In most of these countries, the industrial hearing conservation programme is … Expand.
Evaluation of occupational environment in two textile plants in Northern India with specific reference to noise. Industrial health. Highly Influential. View 3 excerpts, references methods. Subjective evaluation of work environment with special reference to noise. Abstract The presence of subjective noise annoyance was investigated among workers in a machine factory and a textile mill by using a questionnaire. The relation between annoyance due to noise and … Expand.
View 1 excerpt, references background. Association of work-related accidents with noise exposure in the workplace and noise-induced hearing loss based on the experience of some , person-years of observation. Accident; analysis and prevention.
Glutathione S-transferase M1, T1, and P1 polymorphisms as susceptibility factors for noise-induced temporary threshold shift. Hearing Research. Textile Journal. Environmental Health Criteria. Related Papers. By clicking accept or continuing to use the site, you agree to the terms outlined in our Privacy Policy , Terms of Service , and Dataset License. Sources of water pollution: Water is a required commodity to survive and we need water for bathing, irrigation, drinking, washing, cooking, and for industrial purposes.
We get this water from groundwater sources, rivers, and lakes. The factors responsible for the pollution of groundwater and surface water are explained below:. Groundwater pollution: Septic tanks, industries like textile, chemical, and tanneries; deep well injection, mining etc. Surface water pollution: The factors which are responsible for surface water pollution are:.
Effects of water pollution: Around 2. Most of them are diarrheal diseases, typhoid, infectious hepatitis and Para typhoid is also causes.
Control of water pollution: Water pollution can be controlled by the following:. The sound is mechanical energy from a vibrating source. The unpleasant and unwanted sound is called as noise.
Sources of noise pollution: The main sources of noise pollution are various modes of transportation, industrial operations, construction activities and celebrations, electric home appliances.
Causes of noise pollution: It exists mostly in densely populated areas like cities and industrial complexes, railway stations, bus stations, air ports, television, radio, and even kitchen gadgets generate noise. Sound levels are measured in units called decibels. Conservation produces sound at about 40 decibels and so on. The limit that humans can accept is about decibels without pain and damage.
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