To control the noise, different methods and equipment are made to control or minimize noise from different places like hospitals, educational institutions and workplaces. įrom all above discussion, it can be clearly seen that health effects of the noise are common as hypertension, myocardial infarction, stroke, mortality, dizziness, high blood pressure and cognitive diseases, irrespective of the noise sources, suggesting the control of all the noise sources. It also has impacts on animals including frogs to the whales and elephants by affecting their reproduction, communication within and with environmental factors, habitat loss and even death, and plays important role in geographical distribution of these animals. The effects are ranged from cardiovascular diseases to metabolic disorders.
It is given in the documented form that there is an association with several diseases and the growing number of exposed persons all over the world with this type of noise. As we live in houses for the major part of the day and we are exposed continuously to different noise types like lawn mower noise, dogs barking, kitchen grinder operation and sound systems/television which seems dangerous. Household and community noise is also a health issue. Migraines, tinnitus, nausea, sleep disorders, insomnia, quality of life and minor stress strokes are the result of low frequency noise. Low frequency noise is also included in the noise types and effects humans by annoyance and sleep disturbances. However, these are usually not sources of noise as they affect only small communities living in harbors.
In addition to the above, cargo ships are also the source of nuisance and sleep disturbance. This noise also increases vascular and cerebral oxidative stress and triggers vascular dysfunction. It is a fact that noise in the vicinity of airports is a public health issue and its exposure affect sleep quality, restlessness and headache. Due to this noise, workers face different health issues including hearing loss, dizziness, headaches, high blood pressure and anxiety. Noise also disturbs mining worker and their operations. It is produced from mechanical operations, transportation vehicles and different sirens within the industry. It is one of the big problems in industrial areas. These results were obtained by a study that the noises in household appliances operations are one of the main sources of noise. The noises from cracks in a refrigerator, fan and air conditioner affects evenly as a loud noise of train or aircraft because of its continuity. Some noise types like aircraft and train noise also has the negative effects on property prices. All types of noise altogether affect the same irrespective of the sources and cause headache to the high blood pressure and other heart diseases. Noise is a common problem in urban areas as compared to the villages because of the mechanization and more vehicles on the road. Noise affects people so badly that at some places policy makers were compelled to said that there should be restrictions on noisy vehicles for reducing noise pollution as in New Delhi, India and Guangzhou district, China. All above mentioned types of noise are dangerous to human and animals if their limits are exceeded. Noise has different types including impulsive noise, continuous noise, intermittent noise and low frequency noise.
#Noise pollution control methods pdf plus
A vehicular noise is the resultant of the vibrating body of the vehicle plus its engine operating sound. A sound is termed as noise when it becomes continuous and above the threshold limits of the ears.
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