Right at this moment, the headphones are plugged into my ears and I am harking to the songs of Jubin Nautiyal, an Indian singer, whilst penning down one of the most conversed topics of today, I presume, probably at 70 decibels, which is quite healthy for my ears. 

Around 6pm in rushed traffic on one of New York’s highways, one can’t sustain and grasp his senses truly, that’s why; the road accidents have been so common for some last years (For further information, check out WHO’s website). The horns, sounds (when being operational), and the residual products of the vehicles turn them off and you amidst this aching jammed traffic want to hit your head on some sturdy structure, so that, you can take off from this life and be the partner of the bygones. Hahahahah, I was very harsh in jotting down such sentiments.

If we examine that, what’s the truth? We are told the same, one jotted in the preceding paragraph. The noises constantly revolving around our existences have instilled some diseases in us that have left us with the desires of visiting and living (in) the secluded places. The scientific approach of the article begins from here:


Unwanted or superfluous sound that can have injurious effects to our ears and the environment (animals) can be described as noise pollution. The apparent sources of the noise pollution are the industries, workplaces, highways, railways, airplanes, ships, mining operations, jets, construction activities, and fighter jets. It is sad to be known that the noise pollution receives less consideration than the other kinds of pollution like water pollution and air pollution. 


The loudness (amplitude) and the pitch (frequency) of a sound wave are the two peculiar characteristics of the sound; OR sound is defined by these two. Loudness of a sound is generally measured in logarithmic unit called decibels (dB). Loudness is also called sound pressure level (SPL). A normal human body’s ear can detect the sounds ranging between 0dB (hearing threshold) and 140dB. The surrounding SPL in a library is 35dB. The sounds between 120dB and 140dB cause the harsh pains. Sound intensity is the rate at which the sound energy is transmitted and it is directly proportional to the square of the SPL. When the doubling of sound intensity occurs, SPL is augmented by only 3dB. For instance, if a constructional equipment produces a noise of level of 90dB, and nearby, another similar equipment produces the noise at the same time; the level of the noise will be 93dB.


The number of oscillations or cycles per second, in Physics is known Frequency, which is measured in Hertz (Hz). The human ear is capable of detecting the sounds of frequency ranging between 20 Hz and 20, 000 Hz. Whereas, the normal conversations of the humans have frequencies between 250 Hz and 2, 000 Hz. Consider if you listen to a sound, which has the frequency of 15, 000 Hz, what would happen to your sensitive eardrum, it will surely be impaired. 


Almost every living or organic being is affected by the noise pollution, whether; it’s the upgraded humans or the simplistic creatures of the sea. It has a negative impact on wildlife species by the reduction of habitat quality, increase in the stress levels, and masking of other sounds. It has adverse effect on the animals, which are hunted because of their incognizance of the presence of the predators or hunters such as bats and owls. Moreover, some bird species that solely rely on vocal communication are not found in places with noises. That’s why, you observe more birds, chirping, on the moors and mountains, and in the forests and no-noise places.


I know you are desperately waiting for this list. But, before beginning it, I must inform you that, there is not a specialized body or institution which categorizes the loudest and most silent cities of the world. This list is also based on the SPL, which is measured in decibels (dB), no any other indicators have been pondered upon. Let’s begin:


With the population of about 18.4 million, Mumbai tops the list of the loudest countries with the SPL of 100 decibels. A prosperous and famous city of India has been overloaded and overwhelmed by the over-population and the traffic, which has been the cause of so much noise in the city.


The second loudest city is another beauteous industrial city of India, which has the SPL of 100dB. Yet, the population in contrary to Mumbai is lesser but still is bigger, and is of 4.5 million. The industries in the city make it so loud.


One of the oldest cities of the world has the SPL of 90dB. Multiple deaths have been occurred in the city due to the noise pollution and I believe, it will wipe out the whole population of 9.5 million one day.


If you look into the list of the most populated and polluted cities of the world, I’m sure that, you will find 5 to 6 countries of India there. The city has SPL of 85dB. The population of the city is at its best to compete with Mumbai, which is 18 million.


Japan’s capital, credited to have 1000 universities, is the most populous metropolitan with the population half of that Delhi, 9.2 million. The constructions in this busy city contribute to the production of noise at 90dB.


The eminent capital amongst the others holds more the tourists than the permanent residents in it that makes it louder. The 8 million residents of the city may contribute in the development of the city, but can’t in the production of the noise. The traffic and construction projects boost its SPL to 90dB sometimes.


The most populated (24 million residents) city in comparison to the cities mentioned here, has SPL of 85 decibels. 


The healthy population of 21.2 million inhabitants prompts the unusual traffic on the roads of Karachi, which then, produces a SPL of 90 decibels.

At your level, don’t let yourself be the originator or producer of noise as it empowers diseases like stress, insomnia, and hypertension etc.


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