21st Century Noise Pollution – The Facts about Noise Pollution Controlling Noise Pollution

21st Century Noise Pollution – The Facts about Noise Pollution Part 4: Controlling Noise Pollution

In the earlier parts 1, 2 and 3 of this series on 21st Century Noise Pollution we had covered topics on growth of noise pollution since olden days, Management of Noise Pollution, mental and psychological disorders caused by noise pollution. In Part 4 we will discuss noise levels emitted by different items, limits of noise pollution and various sources of noise pollution.

Sound when is unsuitable for our hearing we call it noise. When noise becomes too much for comfort in the surroundings is called noise pollution. Pollution caused by noise can be due to several sources–traffic noise, street noise, noise in playgrounds, workplaces, public transport, shopping malls… there is an endless list. Among the sources causing maximum noise pollution are the airports, and this can be testified by those living near an airport.

Noise Pollution Sources

Unit of measurement of sound is called decibel. Although no particular decibel limit is fixed to determine when sound can be classified as noise, normally it is accepted that an incessantly high decibel value will be considered as noise pollution. A few areas have fixed their own limits for sound, which naturally differ based on the legislation of the area. In the USA, for example, most of the states fixed sound limit as 65 dB during daytime and 55 dB during nighttime, and this is valid for the streets. Anyone exceeding this limit is held responsible for noise pollution.

Nevertheless, all these stipulated limits for sound limits are vague, because most of the equipment used in households and factories go far beyond these limits. Given below are few of the noise pollution sources that we know of but usually ignore:-

  • Home appliances such as vacuum cleaners, mixer grinders, washing machines, etc. jointly cause a collective sound of approx. 87 dB. This alone is higher than the sound limits in maximum number of areas. In addition to this, if you add loudspeakers, music systems, television sets which are used with high volumes, you can very well imagine how high the noise pollution will be.
  • Small factories working with only single machines would create a sound of approx. 98 dB or more. The sound goes higher if more machines are installed.
  • Airplanes are responsible for maximum sound of all – 150 dB.  Road vehicles also contribute to high noise pollution. The vehicles include buses, trucks, tractors, SUVs and even most cars and motorcycles.
  • Also there are many environmental noise pollution sources that are harmful and we cannot ignore them. Uninterrupted noises cause most worries. Noise originating from sources like ticking clocks and dripping taps are very irritating and can also contribute to noise pollution.





21st Century Noise Pollution-The Facts about Noise Pollution Methods of Noise Control and Challenges posed by noise

21st Century Noise Pollution-The Facts about Noise Pollution Part 1: Methods of Noise Control and Challenges posed by noise

The Part 1 of this series of articles on noise pollution is about the growth of noise pollution in the 21st Century from what it was in the olden days and how our ancestors coped with noise. This part also lists out the various physical and mental problems caused by noise pollution. Part 2 is about Noise Pollution Management, what happens physically when noise levels go higher. Part 3 discusses the mental and psychological effects of noise pollution and stresses on the need for green living. Part 4 is about controlling noise pollution. Finally in Part 5 more details on effects of noise pollution on our health and how to control noise pollution are discussed with stress on importance on going green.

Noise is one of the most prevalent pollutants today. The issue is that noise is not just unwanted, it also affects the health of humans and their well-being negatively. Some of the problems associated with noise are stress, hearing loss, high blood pressure, distraction, lost productivity, sleep loss and an overall drop in the standard of living.

As far as business is concerned, too much of noise can lead to permanent hearing loss, higher claims of worker compensation and increased costs of insurance.

Problems related to noise are not confined to industries only. Whatever be the space, there exist three important methods to eliminate or control noise:

  1. Restrict the noise where it originates with mufflers and engineering controls.
  2. Locate, separate and treat whatever paths the noise might take using barriers, dampers and absorbers.
  3. Use noise cancellation methods at the listener end using earplugs, headphones, etc.


Noise pollution in the twenty-first century has grown considerably from the din our ancestors faced in last centuries. Then there was no aircraft, vehicular traffic, jack-hammers and youngsters playing radios and human hearing was confronted only with those natural sounds that meant survival: the thunderstorms, the roar of flesh-eating beasts, and other environmental hubbub occurring naturally. Thus developed the response of “fight or flight” to noise, and today, the same response has translated to stress-related noise.

No one can escape noise pollution except those living in the remotest places on the globe. From the very moment you are awake to the time you fall sleep in the night, you are barraged with surrounding noise; construction equipment, automobile horns and  cell phones,  this is a list which has no end and so is the list of physical and mental challenges man-made noise can pose, which include:

  • high blood pressure
  • increased stress
  • hearing loss
  • vertigo
  • fatigue
  • stomach ulcers
  • sleep disturbance
  • headaches.
  • speech problems
  • frustration
  • movement disorders of muscle-motor
  • anxiety
  • aggression
  • lost productivity
  • withdrawal


21st Century Noise Pollution – The Facts about Noise Pollution Effects of Noise Pollution on Health

21st Century Noise Pollution – The Facts about Noise Pollution Part 5: Effects of Noise Pollution on Health

Noise pollution affects human health seriously but slowly, the repercussions coming in the long run. Given below are some  effects of noise pollution on human health after prolonged exposure lasting months or even years:-

  • Noise pollution affects our mental health almost immediately. For instance, take the case of people who live very near airports. They may probably become quite jumpy. Non-stop noise can trigger panic attacks in people and can also heighten frustration levels. Noise pollution is also a big constraint in the focusing of mind to specific tasks. Over a period of time, mind loses its ability for concentrating on matters.
  • Another quick damage caused by noise pollution is loss of clear hearing ability. Noise pollution will also cause short time deafness. But continued exposure to noise for a long time, can pose danger of the person going totally deaf.
  • Noise pollution can have its effect on the heart too. It is noticed that the rate of pumping of blood by the heart goes up when a persistent noise stimulus is present causing side-effects similar to higher heartbeat rates, breathlessness, palpitations, etc., which may also lead to seizures.
  • Noise pollution may affect eyes and result in dilation of the pupils. This could interfere with the health of your vision later in life.
  • Noise pollution has been known to worsen digestive spasms. This could be the sign of serious gastrointestinal problems.


Controlling Noise Pollution

Governments try their best to control noise pollution, but it is a difficult job and must be appreciated. If we do not look after ourselves, noise pollution will continue to pose a big problem. Following are some tips on individual efforts needed for minimizing noise pollution for everybody.

  • We must frequently inspect our appliances being used at home. There is rubber insulation for most of these equipment that is also a good soundproofing material. But after some time, this insulation will wear out, and then noise pollution starts. Keep a watch on such appliances needing maintenance, and change the insulation if necessary.
  • Grow more trees and it is a very important way to reduce roadside noise. Trees are buffers that absorb sound produced on the streets reducing noise pollution. You may notice that roads having trees on either side are more silent. Grow trees all around your house if possible. This will be effective if you are staying near an airport.
  • Do not use vehicle horns unless absolutely needed. Even if you are in a hurry to get through, honking will not help. It will in fact add to pollution.
  • Those working in factories which make plenty of noise must wear muffs and earplugs. If you own the factory, equip your workers with these.




21st Century Noise Pollution-The Facts about Noise Pollution Noise Pollution Management: Reduce Unwanted Sound

21st Century Noise Pollution-The Facts about Noise Pollution Part 2: Noise Pollution Management: Reduce Unwanted Sound

Several publications and organizations that encourage green living green manufacturing, green construction, and green energy concentrate on harmful pollutants that come in the form of non-biodegradable or toxic or waste.

It is high time to categorize noise in the group of unhealthy, un-green pollutants

Whenever you drive a SUV solo (no passengers), it’s letting out 1.5 pounds or more per mile of gas like carbon dioxide or some other greenhouse gases to the air. With the intention of living green, several of us have modified our driving preferences to improve the environment. We use smaller cars, join carpool, and resort to short trips by bike or by walking instead.

We use reusable water containers when we travel, and if at all we buy bottled water we make sure that the empties are recycled. In our families we use organically-grown vegetables and other food, and for cleaning our homes we use cleansers that are non-toxic because we know, it is healthier if we live green.

When you take into account the damage that noise pollution is  inflicting on our health daily, you will agree that tackling noisy issues would be on top of the list of priorities for “green living” or at least it will be among the top five.

Today, noise pollution is like the plague of the olden days; it attacks our hearing, disturbs sleep patterns, affects our efficiency, and even changes the taste of food. It is also known to up the risks of stroke and heart problem. Noise pollution – like the constant barking of the neighbor’s dog, the irritating sounds of ground and air traffic, manufacturing plants, construction, lawn equipment and similar numerous sources of surrounding sounds that penetrate our space every day – does not form a part of green living.

If you are exposed to sound levels exceeding 85 decibels for a period in excess of eight hours is possibly unhealthy. Eighty-five decibels is approximately equal to the noise made by heavy trucks plying on a city road.

At more than 85 decibels, the sound pressure will damage hearing depending upon the duration of exposure. Though job related exposure to noise is the main cause for loss of hearing, other sources like recreational noise in particular, are responsible too. Investigations have shown that children are more prone compared to grownups to noise related hearing deficiency. Children exposed to noisy environments have more trouble in reading as well as learning and go through an inferior quality of life.

Kids, old people, and those suffering from depression are more susceptible to noise pollution since they may not have adequate defense systems.

Noise pollution affects efficiency in school and at work and, induces more errors, and reduces motivation. Job focus, memory and problem solving, are most seriously influenced by noise.



15 Must Know Facts About Pollution For Kids

15 Must Know Facts About Pollution For Kids – Part 1


Beaches having a coat of oil, rivers turning red because of chemicals, and clouds of smog. Sounds terrifying, doesn’t it? However it is going on all around us, at the moment! All these are obvious indications of pollution. However how much is your kid aware about pollution? Depending totally on education in school isn’t sufficient. Being parents, you have the duty to know what impact children can make on the environment and the way they can create a difference. For kids here are some facts about pollution facts that can assist you to teach them about different types of pollution.


Pollution Types:


The most general pollution types are land pollution, water pollution, air pollution, and noise pollution.


  1. Land Pollution:


Industrial waste and household garbage cause land pollution. Food that is discarded takes up the biggest area in landfills followed by commercial or industrial waste.


  1. Water Pollution:


Water pollution takes place when hazardous foreign substances such as pesticides, chemicals, and fertilizers enter into water-bodies. Marine life can be affected by water pollution severely. For example, sewage can result in the growth of pathogens, and the inorganic and organic compounds in water can alter the composition of the valuable resource. Even dissolved oxygen at lower levels in the water is a contaminant.


  1. Air Pollution:


We breathe air consisting of 99% nitrogen, oxygen, water vapor, and inert gasses. Air pollution occurs when unusual substances enter the air. The most usual type of air pollution arrives from burning fuels. Pollution of this kind looks like filth with millions of minute particles that float in the air. Hazardous gasses like sulfur dioxide, carbon monoxide, chemical vapors, and nitrogen oxide are other kinds of air pollution.


  1. Noise Pollution:


This is the most ignored kind of pollution. It happens when the sound arriving from planes, industry, and remaining sources reach the damaging levels. Although humans cannot see or smell noise pollution, still the environment is affected by it. Also researchers have shown that health and noise are directly linked.


Facts about Pollution For Kids:


Here are few dreadful facts that will give a quick glance to you and your kids on the way havoc is created by pollution on earth.


  1. Pollution is one among the most lethal killers, impacting above 10 million people globally. Kids add to only 10% of the world’s contamination but are susceptible to 40% of the worldwide disease. Above 2 million children below 5 years of age die every year because of pollution. This is one among the interesting facts regarding pollution that children should know.
  2. In the majority of developing countries, 70 percent of the wastes from industry are discarded into the waters. Above 40 percent of America’s rivers and 46 percent of America’s lakes are much polluted to go for fishing and swimming. Also it kills above 100 million mammals and 1 million seabirds each year.


The remaining facts about pollution for kids are given in Part 2 of this article.

21st Century Noise Pollution-The Facts about Noise Pollution Mental and Psychological effects of noise pollution

21st Century Noise Pollution-The Facts about Noise Pollution Part 3: Mental and Psychological effects of noise pollution

Even though it is believed that noise pollution is not a reason for mental disorders, it is thought that it accelerates and strengthens the progress of dormant mental illnesses, stress, anxiety, nervousness, headache, nausea, emotional instability, sexual impotence, argumentativeness, social conflicts, mood swings, psychosis and neurosis. Studies have also found that is connection between noise and health, the use of drugs for psychoactiveness, sleeping pills, and higher rate of admissions in mental-hospitals.

When noise levels go beyond 80 decibels it causes increased aggressive behavior in people and some also become less cooperative with others. There are regular news reports about violent behavior caused by quarrels over noise, frequently leading to injury or even death. This may explain certain inhuman behavior observed in the modern, noisy, congested urban conditions.

Noise pollution affects the environment in a much different manner than pollution due to normal fossil fuel, but the effects can still be very negative. Because of this, many counties have framed laws for noise control laws designating exactly the level of noise that can be emitted by a vehicle legally. It also limits the loudness of a band played in an open door restaurant. The issue with the laws on noise control however, is that they cannot be very easily enforced.

Green living is the fruitful result of years spent on enlightening people on the bad effects of polluting agents and methods to nullify their damage. It is high time that we included noise in this campaign on green education that has created citizens who compost, recycle, preserve energy and water and, see the items purchased and used day to day in a different way than their ancestors did. Time has come to raise the standards; associate the citizens in dealing with noise anywhere possible, and insist that noise offenders and businesses follow suit.

HVAC units and noisy generators, pool pumps, stereos in cars and homes played at very high volume all add to noise pollution. When you drive to your office and the spend hours at work you are exposed to several sources of noise – traffic, sirens, horns blaring,  construction, manufacturing units, machinery and so on – all have impacts on your  health and happiness.

After living several years coping with noise every day of our life when we start thinking that we have got used to it, we start noticing that our bodies cannot take it anymore and we have slow hearing loss, stress, cardiovascular problems, sleep deprivation and other issues.

Let us, for one week, identify the sources of the various noises that have come to be a part of our everyday lives. It will serve as a good starting point for recognizing the particular sounds that cause harm to us and will help us to find solutions for dealing with or eradicating the most damaging agents. It will be a good idea to adapt some green slogans that are currently popular for eradicating noise.




Auditorium Seating

Auditorium Seating

There are a number of decisions that have to be taken before you purchase the necessary seating for your auditorium. Obviously auditorium seating is one among the foundation stones of a good location. Their aesthetics and level of comfort add significantly to the general impression about a venue. Yet another characteristic of considerable significance, nevertheless, is the acoustic quality of the seating.

A badly designed chair can inflict considerable damage to the auditorium acoustics. Even though the acoustic engineers devote a significant amount time on the design of the auditorium as to how the walls must be or the arrangement of acoustic panels to be placed on those walls must be, they at times ignore the seats which occupy a huge part of the auditorium. There are very few items in the auditorium that will have as much effect on the auditorium’s acoustic quality as the seats.

Meeting the challenges that are faced while trying to create an environment that is acoustically sound would amount to implementing a seating solution that will tackle acoustics in two situations, first when the seats are occupied and the second when they are not. When the sitting part of the chair is in the folded up position the acoustic properties will be completely different than if somebody is seated in it. Engineers normally use, for instance, wooden supports below the chairs having regularly spaced holes for minimizing the reverberation of sound waves. Another important aspect to be taken into account is the padding used for the seat which will be usually of foam. Most expert chair manufacturers normally will specify the acoustic ratings of their products with reference to “absorption coefficients”. This figure is a great norm for engineers to know how the chair is going to behave once it is installed. Usually these figures are decided by carrying out performance tests in an approved reverberation laboratory room.

The methods employed for testing should conform to ASTM C423-90a and E795-92 or equivalent international standards. The laboratory carries out the test in a sequence of varying frequencies, by recording the absorption coefficient in sabins per unit at every frequency to decide the acoustic properties. This will prove to be useful while testing an occupied as well as an unoccupied seat. The higher the ability of the chair to absorb the waves of sound, the better it is for your auditorium. Chairs reverberating too much of sound will result in distorting the sound that is being produced by the presentation or performance or in the venue, reducing the quality and clarity of the auditorium.

Locating the deal auditorium seating for your venture is not only about looks. The chair’s acoustic properties have a great role to play in determining the success of your project. Moov Group is among the leading consultants of auditorium seating and acoustics.

Auditorium Seating Weight Limits

Auditorium Seating Weight Limits

There is a limit fixed for auditorium seating weight so that all those people who are seated are safe. When the weight exceeds the limit the rows of seats may collapse and there is a definite possibility of injury to people.

Most of the chairs made for auditorium seating are designed for carrying a weight within 250 pounds for each chair. This weight is usually not the same for every seat on the row.

You will have several people weighing less than the specified limit but there may be few whose weight exceeds this limit also. The average of weight of all the viewers in a row taken will generally come very close to the limit of weight set by the maker.

Many people are not realizing that the limiting of weight does not affect just the individual chair that one is seated in alone. This limit is also applicable to the bars of steel to which the chairs are clamped to and to the framework holding the seats in a vertical position.

If the load placed in the auditorium rows of seating surpasses the value recommended, the bars supporting the chairs cannot take it. They could bend or even break and the entire row may fail and fall. When this happens, those sitting in the seats will fall on top of one another and on parts of the furniture. This may lead to injuries to the people and possible litigations against the establishment.

To prevent such things from taking place most auditorium owners buy chairs designed to bear more load than what the normal seat could. They ensure that additional bracing is given to the chairs so that the structure is stronger thus giving the bar on which the chairs are fixed some extra support.

The separate seats and their backs may bend and give in when heavier people sit in them. Airlines may charge passengers weighing more than the specified limits extra because they occupy more space than normal people. If a passenger’s weight is more the airline is forced to leave the adjacent seat vacant to compensate for the extra weight.

Limitations on weight are critical due to public safety concerns. Some establishments set aside special seats capable of accommodating heavy and large people.

In case you are setting up a place for public to watch a game or show, or for a get together it is advisable to reserve a section to accommodate over-sized people. You may face less safety problems then.


Every chair for auditorium seating must support certain weight limits that it is expected to be in a position to handle. Auditorium seating capable of accommodating heavier people is also available in the market, but it must be remembered that the average seat can only hold a person weighing not more than 250 pounds.



Acoustics in Auditoriums – Know The Challenges And Solutions

Acoustics in Auditoriums – Know The Challenges And Solutions


The auditoriums are among the vital sections in business organizations, educational institutions, religious places and additional public places to get together huge number of audiences. From musical performances, debates and plays to lectures that motivate, auditoriums are needed to cater huge group of people immediately.


Hence, auditorium acoustics are actually essential to make possible clear sound devoid of any disturbances. The reason for this is every person there in the auditorium should have the ability of hearing what is being mentioned on the stage. Though, following challenges might create definite obstructions.




Lacking proper acoustical treatment and equipment, apt sound waves cannot arrive at the receivers hence results in disturbances and lack of ability to hear what is trying to be said by the speaker. The voice of speaker produces sound waves that get reflected all through the auditorium. This causes a reverberation that can be heard by those in the audience.


But, waves of sound cannot reach every individual with identical intensity. This causes unwanted “live” and “dead” spots in the auditorium. Though to considerable extent absorption panels can resolve this problem, however inappropriate arrangement of diffusers and absorption panels could add to the problem even further.


Auditorium Acoustical Treatment


You apparently need professional in the field to accomplish different types of acoustical treatments and techniques of soundproofing that can additionally make auditorium acoustic treatment better. The most frequent places where it is required to have the acoustic installments are corporate offices, multimedia labs, conference halls, recording rooms, and also home theatres.


It is a sensible thing to look for a professional help for services of acoustic treatment for the optimum results. In the market you can locate an enormous range of acoustic products; though only an expert can guide you as to which product is right for specific places. Hence, always watch out for professional technicians having great knowledge regarding acoustic materials.


Additional treatments like detached drum booths, sound absorptive window coverings, and ceiling banners also can be installed for improved acoustic performance of the project.


Professional Acoustics Treatment Solutions


One among the most inexpensive ways to enhance the quality of acoustics in an auditorium to is to opt for self-installation, however under the advice of acoustic consultants. The professional person can assess all of the relevant auditorium characteristics perfectly and set up diverse equipment according to the requirement of auditorium.


With professional assistance one could get anticipated results with immense efficiency for soundproofing, and also acoustical treatment in diverse work areas – be it recording rooms, offices, school auditorium or conference halls.


For those in search of expert solutions for resolving issues connected to auditorium acoustics, Moov Group could offer best guidelines and services.

Acoustical Soundproofing Products for Auditorium Soundproofing

Acoustical Soundproofing Products for Auditorium Soundproofing

The Challenge of Soundproofing

Auditorium design is expected to ensure equal and good clarity of real sound to everyone in the audience no matter where they are seated. Whether it is public speakers, musicians, performers or singers all expect an auditorium with quality soundproofing so that each word is clear and there is great harmony in the music rendered. The audience on its part wants to enjoy superior acoustics with least “dead” or “live” spots in the hall.

The acoustical materials identified for soundproofing in an auditorium must have long life and decorative properties, with fire rating of class A and must have the ability to absorb reflections of sound to control background noise, and must also be able to disperse the sound waves to provide more balance and exposure to the sounds coming from the dais.


By installing decorative, fire rated wall or ceiling sound panels the sound reflections and also their reverberations inside the auditorium can be regulated better to convey better quality sound. The sound waves that reverberate inside the auditorium will fall on specially made sound panels and will be converted into kinetic energy. The reflected waves of sound will be scattered by diffusion panels to balance the dead and live spots inside the auditorium. Also, sound panels must be installed as a backdrop to the stage or at the rear side of the musicians for regulating reverse echo. The model auditorium is typically fan shaped having a curved or sloping ceiling and the floor inclined and sloping down in the direction of the stage. This shape ensures the breaking up of standing waves of sound.

Acoustic Results

By installing soundproofing acoustical panels in an auditorium you can receive and convert the unwanted background noise thereby minimizing the time of reverberation to within 2.0 seconds.  What results is better speech clarity leveling out the musical tones. The diffusion panels distribute the noise and improve the balance all over the auditorium regardless of the location of seats. Thus the audience gets an enjoyable experience and this will ensure that they return to the auditorium.

More Soundproofing Tips

Modern auditoriums have inclined surfaces that facilitate the breaking up of standing waves. Averting “dead” spots and dispersing the sound waves in the hall are the other two functions achieved. If your auditorium is shaped like a gymnasium, you will have repeated reflections of wave of sound. This will enhance the chance of “dead” and “live” spots, and hence you may need more numbers diffusion panels. Remember that absorptive panels reduce background noise, while diffusion panels distribute the reflection of sound in different directions for improved acoustic balance in the hall. For auditoriums in the shape of fan with sloping floors, the ratio between diffusion panels and absorption panels should be 10-1. The idea is to absorb enough background noise to create perfect speech clarity, and at the same time leave enough reverb in the room to mix together the musical tones.

Acoustical soundproofing is an integral part of interior design and decoration. Moov Group offers consultation on design, soundproofing and seating of auditoriums.