Sound Control Blanket Enclosures – Indoor and Outdoor Sound Management

Sound Control Blanket Enclosures – Indoor and Outdoor Sound Management


The skill that a section of sound waves has to move via not only molecules of air, however the molecules in a room’s ceiling, floor, and walls, is known as “sound transmission.” The contrary ability of a section of the same waves of sound to reflect those same molecules is known as sound reflection. The optimum treatments for soundproofing are those that both obstruct sound transmissions and capture reflections of sound to the maximum degree, lessening the measurements of decibel in the room to an endurable level.


Sound Control Blanket Enclosures For Immobile Sound Sources


However the approaches utilized to block transmission of sound vary from those utilized to capture reflection of sound, hence there are few techniques for soundproofing designed to remove both problems. However there are remaining treatments which specifically deal with the issue of sound reflection. Among these treatments, the utility of sound control blanket enclosures, functions very well in situations where utilizing sound absorbent materials will be sufficient to lessen the noise to an endurable level.


Sound control blanket enclosures are very effective since they can be custom-fitted to stop reflection of sound waves from the structures inside a room, and will make a perceptible difference in the decibel level of the space around an immobile sound source.


Many situations are there in which noise is entering from an exterior source, like an external industrial equipment, air conditioning unit, audio speakers or swimming pool pump. Either assembling an exterior or interior sound control blanket enclosure for surrounding the stationary origin of noises such as these will take in their waves of sound, so that the noise hearable to anybody in the nearby area will be considerably decreased.


Sound Control Blanket Enclosures Types


You can assemble sound control blanket enclosures in various ways. You can suspend them either from a ceiling or wall; they can be fitted to a frame that totally surrounds the noise source; or they can also be custom-fitted and fitted to the origin itself, suppose that solution is adequate.


Sound control blanket enclosures hung from ceilings or walls are referred to as sound absorption curtains. The weightiest sound control blanket enclosures are made of an inner layer of vinyl with fiberglass coating perform an outstanding job of capturing soundproofing reflections. Also there are sound control blanket enclosures made to work in severe industrial settings, with external layers of dB-Bloc making them much more long-lasting compared to those of fiberglass and vinyl.


For boisterous environments which are also very humid and warm, silicone is used for cladding sound control blanket enclosures to stop damage from heat, moisture, and ultraviolet rays.

5 Ways To Measure Noise At Work

5 Ways To Measure Noise At Work


As a common rule, suppose you have to yell at your coworker who is only 6 feet from you, understand that the level of noise is very high. That is to say, the level of noise must not be more than 85 dB. For your hearing, level of noise higher than this is not fine. Find below 5 methods that can assist you measure level of noise in your workplace.


  1. Sound Level Meter


You can buy a sound level meter from the marketplace. This meter will help you to measure the level of noise within some seconds. An android app can also be used for the same reason.


  1. Field Calibration


For the most of occupational and environmental legislation for monitoring noise level, one condition is field calibration. Equipment for noise measurement such as a sound level meter should be calibrated prior to and following each use.


For calibration, you could want to use the proper acoustic calibrator which can be installed above the microphone of the meter. Remember that this portion of the meter is brittle and can get spoilt because of misuse. If spoilt, the meter will give imprecise measurements.


  1. Windshield


This is a vital accessory as it reduces the influence wind has while measurements are taken by you. In reality, the windshield guards the microphone capsule from accidental knocks and moisture.


  1. Stand away from the noise source


When using a sound level meter, ensure you grip the meter at the length of your arm and at the height of your ear. Additionally, when taking the machine noise measurement, it is suggested that you stand at a minimum of 3 feet distance from the machine. Your height must not be above 1.5 meters. Standing very close to the source of noise is not a good idea.


  1. Good practice


It is a good idea to question your workers for knowing working practices and activities besides the durations of activity. Besides this, you could want taking notes regarding the working position of every worker.


Ensure you wait for a few minutes for getting the right measurement. You must write down the measurements specified on the noise meter screen. Finally, you could want to utilize the maximum value of the measurements. Ensure the readings are round up. For example, 83.7 dB can be rounded to 84 dB.


Too Much Noise


Remember that extended exposure to noise could result in everlasting damage to our hearing. Hence, it’s vital for you that the damage level is dependent on the noise level and also the time period you had exposure to the noise.


Hence, if you have been seeking a way for measuring level of noise in your workplace, it is suggested that you contact a good expert. Optimistically, you will have the ability to measure and regulate the noise level.

Facts About Residential and Commercial Insulation

Facts About Residential and Commercial Insulation


Commercial and residential insulation can assist you a great extent in saving energy and lessening cooling and heating bills. Unluckily, many commercial and home structures are generally built devoid of or very less insulation in the walls, floors, roof or attic. You must therefore take the initiative for insulating them if you would like to augment their comfort level and lessen your power bills.


If you reside in a house or manage a business in a structure without insulation, the temperatures could be intolerable on the approach of summer. The reason is the outside heat will leak into your commercial building or home and surpass the air conditioning. Also you could experience issues during winter. This is due to the warm comfortable air within the home escaping through the unsealed windows and doors. In a house without insulation, most of the cooling and heating usually escapes via the attic, basement, walls and floors.


Correct insulation of your commercial and residential building will avert heat loss through cold winter months and also avert the heat from exterior coming into the building through hot summer months. Many methods of insulation are present; however you will have to utilize the ones having proven to be efficient. You will have to know the materials having the correct R-values, or values of resistance to flow of heat, for you to make sure that the construction is properly safeguarded. The materials having higher R-values are the optimum when considering protecting the construction from exterior elements.


Insulation choices range from cotton, fiberglass, cellulose, foam, slag wool or rock wool. The widely accepted choice is generally spray foam insulation because it can be effortlessly utilized in the presence of materials. Also it is perfect for insulating the areas that are hard to reach in your house or commercial structure. Prior to deciding which method of insulation to use, it is vital to talk to a skilled insulation contractor for getting proper advice regarding the insulation materials fitting the specific requirements of your structure.


Some people are there who can undertake the work of insulating their commercial building or home by themselves for cutting some costs. Although no problem is there with that, few insulation methods are present requiring a professional for them to be executed properly. You must evade doing insulation projects by yourself particularly if you are uncertain of the needs of your homes when considering insulation.


When you employ a professional for doing the insulation for you, initially they will do an inspection onsite to decide what will be required. Also they will provide consultation and also an estimation of what will be the cost of the project and subsequently give a suggestion of the most efficient method to utilize for solving the problem. Because the professional has apt experience, you can be assured that the insulation project will be dealt with the right way.

Different Ways to Protect the Interior of Your Home with Soundproof Window Coverings

Different Ways to Protect the Interior of Your Home with Soundproof Window Coverings


Window coverings offer privacy and also protection for our belongings within our houses from the harm brought by the sun. Many kinds of window coverings and curtains are available in the market today. You can locate many options as per your preferences and needs for window coverings in specialty shops and discount stores all around.


Majority of people search for window covering that will guard their home interiors from the harmful effect of sunlight. There are yet others who prefer to utilize window coverings for the purpose of protecting and maintaining their privacy. There are yet others who choose window coverings that take in sounds from the exterior and avert them from entering their homes.


The final type of window coverings or curtains mentioned will need special accessories referred to as the soundproof window covering. Materials such as these are diverse from remaining curtains in that they have materials for sound dampening embedded into them for blocking out the noise you are looking for to avoid entering into your home. These materials can be utilized in the procedure of soundproofing walls, ceilings, and doors.


If you wish having soundproof windows in your house you don’t have to go through the process of taking out your windows and fitting new windows. What is actually needed is material that is a sound barrier to be applied to every window. This doesn’t materially change your windows or their functionality either. They could still be opened or closed as the necessity arises however now have the capabilities for dampening sound. Even more vitally, your windows could still be cleaned as the necessity for this emerges as well.


For windows you can usually find sound barriers in either vinyl framed or double pane sound barriers. You will find that the double pane sound barriers can lessen noise to the extent of 20%. Alternatively, window coverings comprised of vinyl frames are known to lessen the extent of noise passing by from 30-50%.


The effect of sound dampening of these kinds of additions to window will considerably lessen sounds that can attack your home whether they are noise of neighbors or street noises. Also heavily lined drapery can increase the effect and function to prevent even additional sound from attacking the sacredness of your home. If you would like having even more effects of sound prohibition in your windows you could want to seek plantation shutters filled with foam that are made for this reason among other things.


DIY Soundproof Window Coverings


If you are in search of an alternative to vinyl framed or double pane window covering the option you have is installing a detachable plug that utilizes sound deadening materials. You can find these materials in your backyard. Suppose you select cautiously you will find that the plug can not only be used to block out sound however also for blocking out light.

Building, Design for Sound and Acoustics, Part 9, Overview of Soundproofing Materials

Building, Design for Sound and Acoustics, Part 9, Overview of Soundproofing Materials


This is a continuation of the previous part titled ‘Building, Design for Sound and Acoustics, Part 8, Overview of Soundproofing Materials’


Option # 4 is a procedure called de-coupling. The essential idea is to remove the connection the drywall has with the framing studs. By achieving this objective the energy of sound can be obstructed from coming into the facility’s structure hence either removing or greatly lessening transmission that is structure borne sound. The procedure utilizes isolation mounting clips that are mounted to the framing studs directly. Clips such as these are made to obstruct the transfer of sound energy. Then a metal strip known as hat or resilient channel is fixed at 90 degrees to the ceiling and wall framing studs. Resilient channels are metal strips with a set off spacing the drywall at a distance of about ½ inch from the framing. They are usually fixed 24 inches in the middle making 90 degrees with the studs. The utility of resilient channels considerably reduces the extent of sound that the structure conducts. On viewing along the side they look like an old top hat, therefore it is known as hat channel.


On installing properly it is an extremely efficient soundproofing method. The vital point is “installed properly”. Attach the drywall to the resilient channel but not to the studs on the frame. It’s very vital that installers do not fix screws into the studs on the frame. Suppose this happens the decoupling can be weakened by letting a passage from the drywall to the facility’s framing infrastructure. Few essential characteristics are mentioned below.


1) Acquires separation without loss of space in comparison to two wall construction.


2) Offers excellent performance across the range of frequency.


3) Functions well at soundproofing frequencies at lower end.


4) Isolates the surfaces of room from the structure.


5) Utilizes resilient channel (hat), isolation clip, treatments for floating floor and Isolation Hangers for decoupling the surfaces of room from the structural frame.


6) Clips attach to framing directly.


7) Drywall is fixed to the resilient channel that obstructs mechanical energy (vibrations) from being transferred to the inside of the framing.


8) The isolation clips experience the problem of misplaced screws in the absence of resilient channel.


9) Screws penetrating the stud on the frame will cause short circuiting in the system lessening the soundproofing performance and effectiveness. The outcome is that you will end up spending plenty of effort and money and it just won’t work to its entire potential. Not good.


By introducing the Isolation Clip to the system the manufacturers of soundproofing products significantly eliminated the issues of installation removing the issue of misplaced screws which eases installation. On installing properly its performance of soundproofing is solid.




Building, Design for Sound and Acoustics, Part 8, Overview of Soundproofing Materials

Building, Design for Sound and Acoustics, Part 8, Overview of Soundproofing Materials


This is a continuation of the previous part titled ‘Building, Design for Sound and Acoustics, Part 7, Overview of Soundproofing Materials’


Basic Characteristics of Factory Damped Drywall (continued)


3) More costly than traditional drywall however has certain benefits considering installation over remaining methods of soundproofing.


4) Weightier than ordinary drywall, a little more hard to cut. Generally it is one among the least hard to install considering technical labor.


5) In comparison to few of the remaining methods it is an extremely effective method concerning soundproofing.


6) Independent testing backs up the test data and the performance of product is documented well.


Option # 3 is a product referred as a viscoelastic noise proofing compound (substance like putty) material for soundproofing that is applied using a caulking gun like caulk amid two drywall layers. The product utilizes standard drywall however requires two drywall layers. Installing the initial layer is done in a normal manner. The viscoelastic compound is applied over the inner side of the second drywall layer before installation. Subsequently the second layer drywall is installed above the first layer by overlapping the seams in opposite direction. The intention is having the first layer seams enclosed by the second panel of drywall in a crisscross method. This method eliminates the likelihood of lining up of the seams and providing probable opening in the drywall that allows sound to go through the facility’s structure.


This product has the big advantage that it can be used in current situations to add extra soundproofing devoid of having to rebuild the current facility. With the addition of an extra drywall layer above a current drywall layer the performance of soundproofing of the ceiling and/or wall will be significantly better. The material offers dependable performance in the frequencies at lower range when applied correctly. Few essential characteristics are mentioned below.


1) Offers dependable soundproofing performance however you will have to consider the installation expense of an extra drywall layer. It will need supervision of installation and application.


2) The force of compressing two drywall layers distributes the material amid.


3) A few weeks will be taken by the material to totally cure and attain maximum effectiveness.


4) Suggested rate of application is 2-3 tubes for each 4 x 8 drywall sheet.


5) Independent test reports of soundproofing are accessible for analysis on the website of manufacturers.


6) Generally a good choice for soundproofing that balances budget versus performance however can be much disorganized to work with. The crucial thing is that it should be properly applied to attain desired results.


The continuation of this is given in the next part titled ‘Building, Design for Sound and Acoustics, Part 9, Overview of Soundproofing Materials’.


Building, Design for Sound and Acoustics, Part 7, Overview of Soundproofing Materials

Building, Design for Sound and Acoustics, Part 7, Overview of Soundproofing Materials


This is a continuation of the previous part titled ‘Building, Design for Sound and Acoustics, Part 6, Overview of Soundproofing Materials’.


Mass Loaded Vinyl (MLV) (continued)


MLV products are usually installed above the framing studs before drywall. Also it can be installed amid two drywall layers for improved performance of soundproofing. Usually these products attain a rating of STC in the 26-27 area. There will be a decrease in performance considerably in the lower frequencies of bass and performance will not be good in a location where there is prevalence of low frequencies such as performance halls or music rooms. Few essential characteristics are mentioned below.


1) Most general MLV product is a 1 lb per square foot version.


2) Usually comes on a 54 inch wide roll. It has flexibility and accessible in diverse lengths.


3) Carpet knife can be used for cutting it.


4) The flexibility and weight make it hard to handle.


5) Needs extra labor to install usually needing a team of 2 or additional installers.


6) Particularly difficult on ceilings because of the nature and weight of the product


Option # 2 is a product known as Factory Damped Drywall. As inferred by the name this is a product based on drywall that is particularly made as a soundproofing material. In the process of manufacturing a layer of product for sound damping is sandwiched inside the drywall panel. Just like with ordinary drywall the product can be had in different thicknesses that ranges from ½ inch to 1 3/8 inches. The performance of soundproofing will differ based on the installation method and the product.


The big benefit of this product is the process of installation. Its installation is done mostly the same way as ordinary drywall. Compared to standard drywall the product is costlier however the simplicity of installation could offset the augmented cost with savings of labor.


As far as the performance is considered, the product quality is as advertised. Its performance rates from good to great in the lower ranges of frequency based on the method of installation and the product selected. For bigger rooms this would be preferable just depending on the simplicity of installation. It doesn’t require any specific installation crews hence an ordinary drywall installer must not have any problems regarding installation. Few essential characteristics are mentioned below.


1) Material for soundproofing provides different soundproofing levels (STC Ratings) and can be utilized on ceilings, walls, and also floors.


2) Installed just like traditional drywall.

The continuation of this is given in the next part titled ‘Building, Design for Sound and Acoustics, Part 8, Overview of Soundproofing Materials’.


Building, Design for Sound and Acoustics, Part 6, Overview of Soundproofing Materials

Building, Design for Sound and Acoustics, Part 6, Overview of Soundproofing Materials


Quick Point #1


Soundproofing a room completely is an almost impossible task. It can be performed; however in most applications the expenses involved are exorbitant. Hence the more practical goal is to lessen the amount of transmission of sound from one room to another as much as probable within a specified budget.


The purpose of soundproofing is obstructing the sound energy flow via the walls of a specified room and to the inside of the structure the facility has. After the energy of sound comes into the building’s structure it will be transferred from one room to another decreasing the experience of the occupants, guests and residents to your facility. Isolation and density are the two most efficient forms. Several techniques and products are that manufacturers offer and used by soundproofing companies. Prior to selecting any method or product it is vital to examine the uses and purpose of the space you are trying to soundproof. You want to evade choosing a product that could be excessive or inadequate. As with majority of products the superior the performance will imply you have to make a bigger investment.


While isolation and density are the most efficient soundproofing methods, an airtight concrete bunker may not be a solution that is practicable for your application. Concrete has density that does present a solid soundproofing level however; you are yet faced with remaining concerns of soundproofing such as the lighting, A/C, electrical, entry doors and windows, to name some. A common rule for following is that sound will follow where air flows.


Okay, hence the idea of concrete bunker is not feasible. Here are few soundproofing alternatives for considering. In the subsequent section four kinds of materials for soundproofing are examined and few comparisons of performance of soundproofing are done. To know the performance of soundproofing of these products you have to know what the basic ratings are. The Decibel(dB) and Sound Transmission Class(STC) ratings from Parts 3, 4 and 5 will be used hence please take some time for reviewing those articles.


Option # 1 is a product known as Mass Loaded Vinyl (MLV) or Limp Mass Barrier.


Level 1 Material for Soundproofing beyond fiberglass insulation and standard drywall.


MLV is a limp mass material utilized to obstruct unnecessary noise and lessen sound transmission without decreasing space. Several soundproofing companies provide this or just like product under diverse names but essentially is the same product.


The continuation of this is given in the next part titled ‘Building, Design for Sound and Acoustics, Part 7, Overview of Soundproofing Materials’.



Acoustic Treatments Basics – Types and Forms of Acoustic Treatment and Where They Can Be Used

Acoustic Treatments Basics – Types and Forms of Acoustic Treatment and Where They Can Be Used – Part-2

Pressure Based Absorbers

This category of absorbers take up less space compared to velocity based ones and is generally used to tackle problems of low frequency. Helmholtz resonators, sealed panel absorbers and membrane absorbers belong to this category. These are absorbers with narrow band and are used for handling specific frequencies. They will not be effective if you are faced with wide range of frequencies to be tackled and if they are not designed properly, they may resonate at some unwanted frequency.

Velocity Based Absorbers

Bass traps and acoustic panels using porous material fall in this category, for example, fiberglass, foam, rock wool etc. They work by weakening the sound energy by transforming it and letting it out in the form of heat energy. They can minimize sound energy of almost all the frequency ranges. Thicker panels absorb frequencies of lower ranges. Because they can handle a large range of frequencies, they are also called broadband absorbers. Velocity based absorbers find application in acoustically treating general problems, which covers controlling of reverb time in a room and compensating for room modes which are below ideal norms.

Miscellaneous Materials

It is possible that, the room has carpets, sofa, furniture, windows and several other objects that can influence the sound. Even a crowded room can affect the acoustic treatments. Quantity of sound absorbed by objects varies at specific frequencies.

Positioning of speaker is also important. Certain areas in a room can cause cancellation of phase of the reflected sound from a wall with what we hear from the speaker (also called Speaker Boundary Interference). Locating the proper place for placement of speaker should be done on priority – on the basis of the room geometry. Once you find the ideal place we can make use of some of the techniques mentioned above to tackle the remaining problems. All factors are to be considered or used as per our requirement.

Using the Techniques

The extent of complexity of acoustic treatment depends basically on the application and budget. In case of critical listening environments, calculate the reverb time accurately and use the right absorbers to address wrong room modes. This may not be easy and calls for real technical expertise and experience, because in certain situations the actual world results may not be the same as the numbers. One common mistake is the placement of too much of bass traps and acoustic panels. When you place too many foam absorption panels, the result is that the bass frequency gets relatively louder and it becomes even harder to tackle uneven response of frequency. An excessively dead room is also not good for recording instruments.


As may be seen, acoustic treatment must be done for a particular application. You can’t have a single room that suits all purposes.

Acoustic Treatments Basics – Types and Forms of Acoustic Treatment and Where They Can Be Used

Acoustic Treatments Basics – Types and Forms of Acoustic Treatment and Where They Can Be Used – Part 1

Acoustic treatments related to architecture for beginners!

There exists an important difference between soundproofing and acoustic treatment – actually acoustic treatment is done to prepare a room optimally suitable for a specified application, and not for the prevention of the escape of sound. In the first part of this article we will discuss the room size, shape and dimensions and in part 2 how this can be done.

Room Size, Dimensions and Shape

Room dimensions play an important role in what can be heard inside the room. Sound waves, by bouncing off the walls add to the direct sound, causing early reflections, reverberation and flutter echo. The larger the size of the room, the more will be their effects. What part of it we wish to add to the direct sound actually depends upon the application. It could be a classical music hall. Or you could be recording instruments with the purpose doing studio work. The applications require different conditions and need acoustic treatment of suitable type. It is noticed that the artifacts like huge statues installed in some famous symphony halls contributed to good acoustics needed for classical performance.

The wavelengths of sound also vary and if the actual distance from one solid wall to another equals the wavelength of a specified frequency, then a phenomenon called standing wave (also called room mode or resonance) takes place when the wave rebounds between the two walls. This is not ideal for critical listening because it artificially boosts the amplitude of that related frequency. Such resonances are known as axial modes. Also, sound may rebound from the walls again and again, giving rise to more multiple resonances like oblique and tangential modes. This needs a specialized software to handle but the values given below called bolt ratios will be helpful while designing the dimensions of the room.

1: 1.14: 1.39

1: 1.60: 2.33

1: 1.28: 1.54

It may be noted that you can use these values in whatever order, whether length, height or width. These ratios cannot be taken as the ideal ones for a perfect room, but are only guidelines accepted after trying for years of real situations. Standing waves are due to parallel walls, so, in case you are planning a professional recording studio, it is advised to build the walls at some angle to minimize this phenomenon.

Sound Absorption

Clearly, the dimensions of the room have to be decided at the construction stage of a building. Often, dimensions of a present room do not meet the ideal ratios and you can rarely find a spare room having non-parallel walls. To tackle this problem, there are several different methods – the first one being through absorption of sound using ceiling panels, wall panels etc. Absorbers may be grouped into 2 classes – pressure based and velocity based. Each has its own advantages and disadvantages. This is dealt with in Part 2.