Aircraft noise pollution

– Everyday there are thousands of flights
flying in the skies around the globe. – The number of flights is expected to reach 40 million this year. – The noise generated from all these aircrafts are affecting the people who work near airports. – It’s also affecting people who live nearby
all these major airports as well. – This has become a major problem not just to human beings but also to the environment and it’s called aircraft noise pollution. – There are two types of aircraft noise sources which are airframe noise and
engine noise. – Airframe noise occurs when air passes over the body and the wings when the plane is moving. – The air causes friction on the surface of the plane and hence it produces noise. – For engine noise, it is generated by the sound from the
moving parts of the engine. – The noise is also produced by the air being expelled at high speed once it has passed through the engine. – Most of the engine noise comes from the exhaust or jet behind the engine, the fan
or the compressor. – All these aircraft noises can affect us in many ways. – Over the past 10 years, studies from the UK shows that long-term exposure to high
level of aircraft noise may have higher risk of poor cardiovascular health. – Sleep disturbance is also one of the most harmful non auditory effect. – Without enough sleep, it can affect your productivity, your performance during the
day and also your quality of life and health. – Besides that, aircraft noise
exposure is also linked to poorer psychological health. – Studies found that a 10 decibel increase in daytime aircraft noise was associated with 28%
increase in anxiety medication use. – People also reported annoyance with all
the aircraft noise at home or at school – Annoyance can come with symptoms related to stress such as changes in heart rate and blood pressure. – The aircraft noise exposure at home or at school are also having an impact on children’s reading
comprehension and cognitive skills. – The students’ attention and performance are also affected when they experience sleep
disturbance due to the aircraft noise exposure at home. – But is aircraft noise
regulated by any legislations at all? – Aircraft noise legislation is
principally governed under ICAO through the international standards and guidelines
set under Annex 16. – ICAO enforces environmental protection compliance on aircraft noise through the implementation of aircraft noise
certificate and aircraft noise charges. – That means an aircraft is not allowed to
fly unless it has a noise certificate – Aircrafts need to be tested with the
flight test procedures to measure the noise generated by the aircrafts so
that they do not exceed the specified noise levels. – On the other hand, under the
aircraft noise charges, anyone who owns aircrafts that fly with excessive noise
can be charged a levy for the cost of noise alleviation and preventive
measures. – However, this is at the discretion of the country’s authority to
enforce the aircraft noise charges. – So how can we control aircraft noise? – Well, the most effective way to reduce aircraft noise is to make modification
to its engine. – Hybrid engine and solar-powered engine are some of the areas
which are currently under development and testing. – On top of that, the engine
and aircraft body need to be combined as a blended body to be more aerodynamic. – While reduction at source is the most viable and long-term solution, land-use
planning such as buyouts, noise insulation and meticulous future
planning for the development surrounding the airport can add on to the overall
reduction of the noise level. – Smart tracking system can help to navigate the aircraft to avoid noise sensitive areas. – Noise preferential routes can also be
planned to keep the noise level to a minimum. – For ground operations, autonomous
towing which is basically moving the aircraft by other towing vehicles and
not switching on the plane’s engine contributes to a big part of noise
reduction. – In terms of operating restrictions, quota
count system and airport curfew are some of the measures imposed to avoid
excessive noise generation especially during the night hours. – In short, aircraft noise pollution is real and it’s still happening today. – However, aircrafts are already 50% quieter today than they were 10 years
ago and they are 75% quieter than the first generation of jet aircrafts. -So, next time if you ever decide to buy a house, make sure it’s not located near to
an airport or else you’ll have to bear with all the noise that you get to hear

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