How to Soundproof your House With Quality Acoustical Products from Best soundproofing contractors

sound proofing Acoustical Soundproofing Products

How to Soundproof your House With Acoustical Products

Why soundproof?

Usually soundproofing your house is required if living adjacent to noisy neighbors or suppose you want to construct a home cinema or music studio.  Older flats and houses having very thick walls endure less noise compared to more recent dwellings constructed with lighter masonry and cavity walls. Experiencing noise pollution in recent buildings is very much a problem and more in cities and towns.

Noise from loud voices, neighbors, stereos, televisions, and traffic are some of the usual noise pollutants we experience in our everyday lives and can lead to ill health and stress.

Several people think it is much too expensive and difficult to fix these problems of noise and hence, just tolerate it however there are noise solutions that are not expensive. Presently you can very easily soundproof your home utilizing either tradesmen locally or if you are oriented to DIY, fit the insulation yourself. This article will guide you on how your home can be soundproofed.

Is it needed to soundproof my house?

Too much noise pollution is an issue that can cause ill health as given earlier and presently the Government recognizes this. Therefore there is presently legislation in place for all latest and converted buildings intended for multi-occupational utility particularly to lessen pollution by noise in these areas. These regulations have been brought in to make better and soundproof all isolating floors and walls in these properties however also to lessen reverberated noise (echo) in every common area. Also these regulations apply to new hotels, hostels, and residential homes and also schools and hospitals.

Is it worthwhile to soundproof?

The optimum way to lessen sound is either to absorb it or block it. Irrespective of who fits the insulation, these are the two methods that would be utilized, either in combination or independently. For reducing noise via a wall or floor, a sound blocker of high density should be utilized. More the mass in any kind of sound blocker the more efficient it will be at more noise blocked out. Combining this with an absorbing of sound can give an excellent level of reduction in sound and is the principle utilized to soundproof most floors, walls, and ceilings.

Acoustic Plasterboard of high density is an economical sound blocker available readily and when utilized in layers will give excellent levels of reduction in sound. Acoustic Mineral Wool (AMW) of the proper thickness and density is a very effective absorbing of sound and can be utilized in stud walls and amidst timber joints supporting ceilings and floors.

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Reducing Noise Levels in Hospitals With Acoustical Products and Materials

acoustical products for soundproofing ceiling to control noise

Five Tips for Reducing Noise Levels in Hospitals

In the last 40 years, the noise levels in hospitals on an average have gone up by 15 decibels, sometimes reaching levels of even 70 decibels, which is much above 35 dB, the level recommended by World Health Organization for a soothing environment.

The hospital staff spend around 40% of their normal working hours in different methods of communication. So as to make them easily reachable, provide them a better impression and get closer to the patients, several hospital staff work in open-plan settings. This could be in intensive care or emergency departments or nurses’ desk positioned at the corridor intersections.

Inside this area, the staffs are required to listen to and construe alarms, hold private conversations, do their rounds and, in several cases, carryout complicated medical assignments. A below-par acoustic environment will lead to higher level of miscommunication and more errors, and also contribute to avoidable stress levels that will affect the health of the staff.

Loud alarm sounds, noises of equipment, and voices all will interrupt healing sleep and lead to stress in patients. Those patients, who are in emergency wards, operating theaters, I C Us, and the newborns in neonatal rooms, are particularly sensitive to such sounds.

Tips on reducing sound levels in hospitals:

Design rooms imitating nature

Human hearing works best when you are outdoors. This shows that we should imitate natural acoustic conditions within the hospitals. We hardly see, parallel, straight surfaces outdoors causing sound wave reflection to and fro across an area, produce worrying responses. It is a fact that long passages indoors with reflective surfaces will cause sound travel long distances, enhancing the levels of noise in general. Irregular three dimensional surfaces are therefore recommended wherever possible. Convex-shaped or irregular reception desks are one solution, because these tend to scatter sound waves in various directions. Wall panels that are washable and sound-absorbent are ideal for absorbing noise generated in the corridors and nurses’ station to reduce the general noise level inside.

Reduce equipment noise

High levels of noise close to patients are a usual problem in ICU. Find such sources of too much noise like automatic door openers, food trolleys, telephones, alarms, beds, and pagers. The stands holding intravenous equipment often give out alarm sounds. While it is important that some particular alarms are audible over the ambient noise, it is still possible to define conditions about noise levels when ordering equipment. Use alarm systems that do not give out audible signals.

Keep noise source away from patient

Do not carry out any activity like tearing open a package that can create a disturbing noise of 70 dB Do not do it close to the patient’s head.

Screens separating patients

Eavesdropping on other’s conversations, snoring sound and patients crying in pain are some noises that can be disturbing. Use suitable, mobile sound-absorbing screens to separate two patients.

Reducing Noise Levels in Hospitals With Acoustical Products and Materials

Operating theaters are noisy, especially during orthopedic operations when saws and drills are used. At the same time clear communication is very important to a fruitful operation. Disinfection, washable, sound-absorbent wall and ceiling absorbers can meet all the required hygiene standards.

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Achieving Effective Acoustics in Hospitals–Cover Noise and Decrease Noise With Acoustical Products

Interior acoustical soundproofing products

Achieving Effective Acoustics in Hospitals

Cover Noise and Decrease Noise

  Cover Noise

The system of sound-masking is set to a volume which is much below that made known to reduce sound perception via a stethoscope. Besides, since sound masking needs some distance for becoming effective, when set to a right volume it won’t stop patients from understanding their staff or caregiver from communicating. Besides, since it is not a sound barrier physically, it does not impact caregiver access.

Also, as per finding sound masking is a very efficient method of making sleep better. Studies reveal that it lessens the time taken to fall asleep and assists to lessen sleep disruption because of noise. Actually, in a study of patients in ICU, sleep quality improved by 42.7 percent on using sound masking. Again, the success of technology depends on its skill to lessen the extent of change of volumes from baseline to peak. This change, instead of the noise volume itself decides whether or not awakenings or disruptions occur.

It is vital to search for a flexible system of sound-masking providing control locally for individual areas or rooms, letting staff or occupants regulate the volume as required. In this scenario, not only will the masking will improve comfort; however also increase sense of control for patients over their environment. After installation, a system networked will let changes to be done without the ceiling being reopened, which is vital to sanitation. Majority of systems of sound-masking also provide background and paging functions if required.

Decrease Noise

One tactic unnoticed by the ABC Rule includes the identification and following lessening or removal of needless noise sources. Quieter hand towel dispensers, mechanical equipment, and door hardware, and also rubber-wheeled carts are vital. Duct silencers must be installed. Defective equipment, like squeaky carts, must be rectified or replaced. Patients must use headphones while watching television. Staff must lessen the volume of ringing on telephones, switch off television sets not watched, try to promptly respond to alarms, and have training to handle noisy vocalization by patients.

Also it is vital to raise awareness of staff of their personal actions, like talking loudly or shouting at one another down the hallway. Few facilities of healthcare have asked staff for forming a unique committee to increase awareness of this problem and to enforce and develop policies intended at regulating noise. Visitors must also be educated regarding the harmful noise effects and encouraged to abide by the rules.

While changes in behavior are required, invariably people will create noise when they undertake their tasks. After making optimum efforts to lessen noise at its origin, all noises remaining should be regulated via design utilizing the ABC Rule. It is required to combine all methods since every one plays an exclusive role in the result.

Acoustical Surfaces products and services 

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School Class room Acoustics With Acoustical Products and Imported Materials

Acoustical soundproofing products and materials

School class room Acoustics

It is important for schools to have proper acoustics. Classrooms in schools in particular need speech intelligibility and sound quality but there exist many other places in schools which have to be acoustically treated. From gymnasiums and cafeterias to auditoriums and band rooms, there are several areas to be treated. To control classroom noise you may have to treat areas like school parking areas and courtyards where big generators or coolers often produce too much sound. Following are some examples of treatments that can be done to improve acoustics in schools.

Cafeterias Acoustics with soundproofing products

The school’s lunchroom has hard surfaces that are parallel and ideal for reflecting general noise and voices all over the space. This reflecting is known as reverberation, which seriously lessens speech intelligibility, posing a serious problem for both students and teachers. To counter this, panels wrapped with acoustic fabrics are hung from the ceiling at two places. Such extremely absorptive products are usually found in bigger rooms.

Music rooms with proper acoustical materials

The design of ideal chorus and band rooms should consider not just the acoustics of the room, but also the how music played in the room is going to affect the neighboring rooms. Acoustical materials used to improve the sound are used on walls, ceiling and corners. Some of the materials used are acoustic wall panels and ceiling tiles, bass traps and sound diffusers. Acoustical products intended to make sure that the music played in the room doesn’t cause disturbance to adjacent classrooms are installed inside the floor, walls, or ceiling or even on their surfaces.  Such products comprise of sound blockers like high-mass vinyl and floor underlays.

Gyms soundproofing products and materials 

Acoustic treatment of gyms involves a combination of hanging acoustic banners or baffles and acoustic wall panels. Hanging acoustic banners and acoustic baffles are the same but baffles are suspended using two points, whereas banners are suspended from four. However, because of the nature of acoustics in some rooms, it wasn’t applicable for several purposes. In earlier days acoustical treatment of the room was carried out for recreational purposes only like basketball due to the extreme echo or reverberation within inside the room.

Auditoriums seating and soundproofing by acoustical engineers

Auditoriums are places where band concerts, classes, plays and many more things happen, and also they are places where intelligibility of speech is critical. To meet this requirement, a mix of suspended acoustic banners and acoustic wall panels are used. You can use sound diffusers on the side walls and acoustic wall panels on the rear wall.  A combination of diffusion and absorption can be used to avoid excess absorption to prevent the hall sounding ‘dead.’  Diffusers disperse or break up the sound that does not get absorbed, so that the room sounds much more ‘alive.’

Outside noise control with acoustical products

Positioning of big chillers and HVACs outside can cause serious sound issues. The units may not be in the proper or ideal locations in the courtyards of the school. Acoustical engineers may suggest putting up absorptive sound walls surrounding each unit to prevent noise leaking out.

Soundproofing Auditoriums, Soundproofing Bars, Soundproofing Broadcast Studios, Soundproofing Cafeterias, Soundproofing Call Centre, Soundproofing Ceiling, Soundproofing Churches, Soundproofing Classrooms, Soundproofing Computer Room, Soundproofing Conference Rooms, Soundproofing Fellowship Halls, Soundproofing Floors, Soundproofing Gun Range, Soundproofing Gymnasiums, Soundproofing Kennels, Soundproofing Multi-Purpose, Soundproofing Music Rooms, Soundproofing Offices, Soundproofing Prison, Soundproofing Recording Studios, Soundproofing Restaurants, Soundproofing Sanctuary, Soundproofing Schools, Soundproofing Swimming Pools, Soundproofing Walls, Soundproofing doors, Soundproofing Windows,

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Auditorium Acoustics Considerations Problems Solutions with acoustical soundproofing products

acoustical soundproofing products

Auditorium Acoustics Considerations -Type of Performance, Problems and Compromise Needed

When you are treating a performance area or auditorium acoustically, you have to consider many things. Though some of them are obvious, they are often ignored.

Type of Performance of acoustical products

This ranges from normal acoustic to highly powerful augmented electric. It may be traditional music or a Capella or it may be only speech or music, or an acoustical ambiance compromised to have both. You cannot have one common to all.

A theater of the vaudeville period which was well-designed for that time may project an no amplified show quite well, but can be easily overloaded acoustically and overwhelmed in today’s high-powered shows. Sound in those days could not be heard in the back rows, but now it hits them with such force that it produces slap-back that annoys and interferes with the speaker’s concentration and the musician’s timing.  On the other hand, if a present space has to be used as a natural venue for acoustic shows, hardly any treatment and sound reinforcement may be required.

Problems in acoustics 

Then, there is a noise problem or sound problem, noise problem being the lower class of sound and is unwanted. The noise may be entering the auditorium or exiting it to cause disturbance to neighbors or other residents in the building.  Noise at higher-pitches will usually be less forceful, having lesser energy content and can be controlled more easily using heavy, solid barrier materials like layers of mass loaded vinyl or gypsum board.

Low frequency sound has longer wavelengths and usually possesses more power. Sound of longer wavelengths need to travel  a more distance to develop fully and may this may be the reason why the neighbors may feel that a sound is louder than what the people who are very near the source feel. Low frequency sound is usually structure borne and need to be decoupled from the source using resilient isolation. This sound treatment will cost less if it is implemented at the beginning of construction when it is possible to split a slab of concrete or to drift a floor over pads.

Compromise Needed on sound issues

The main consideration regarding an auditorium is mostly the quality of its sound. Also, the quality of sound is different for every listener or every source. A standard space will have best sound effect for spoken word for reverberation time, RT60, which lies between 0.90 to 1.00 second. (Reverberation time is the time interval between the time that the sound is made and the time that it takes to become inaudible). Traditional music will be better heard if the reverberation is between 1.5 to 1.6 seconds in the same room whereas electronic music is preferably heard “dry” that is, no echo or reverberation except what the sound engineer adds artificially. These two situations need to have compromise at may be 1.25 seconds for a classical performance, whereas in case of electronic music speech is clear in a dry room having additional artificial ambiance as per taste for the specified music.

Soundproofing Auditoriums, Soundproofing Bars, Soundproofing Broadcast Studios, Soundproofing Cafeterias, Soundproofing Call Centre, Soundproofing Ceiling, Soundproofing Churches, Soundproofing Classrooms, Soundproofing Computer Room, Soundproofing Conference Rooms, Soundproofing Fellowship Halls, Soundproofing Floors, Soundproofing Gun Range, Soundproofing Gymnasiums, Soundproofing Kennels, Soundproofing Multi-Purpose, Soundproofing Music Rooms, Soundproofing Offices, Soundproofing Prison, Soundproofing Recording Studios, Soundproofing Restaurants, Soundproofing Sanctuary, Soundproofing Schools, Soundproofing Swimming Pools, Soundproofing Walls, Soundproofing doors, Soundproofing Windows,

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Potential Flanking Path Sources and How to Deal With Them – Duct Work soundproofing products

Acoustical Soundproofing Products

Potential Flanking Path Sources and How to Deal With Them – Duct Work

Duct work can present problems because it can open a direct path of air for sound to transmit. There are several products now available for controlling sound coming via ducts. Some of them are:

1. Duct Liner soundproofing product

Use insulated (lined) duct work. The lining inside the duct is a material that absorbs sound. It helps to eliminate sound as it rebounds through the “tunnel” made by the duct. Insulation is to be within the duct so that it is effective. Flexible insulated ducts are also available.

2. Long, multiplex paths are best for soundproofing

Ideally the path of the duct originating from the source of noise to the area where you want no sound should have as many bends and be as lengthy as possible. This provides a considerably complex path through which sound has to travel, giving the liner inside more time and length to be effective. Bends 90 degree or even 180 degree in the duct are helpful as the airborne sound is forced to react with the liner of duct more thoroughly. Flexible ducts inside a joint space should be fixed with a serpentine curve shaped like “S”

3. Flexible ducts are useful

Use flexible duct only in places where the duct is not exposed to sound directly. Flexible duct used in some section of the path will help to interrupt the path through the structure that the duct provides. Ducts radiate sound internally via the air they hold, and also through the outer metal of the thin shells.

4. Use soffits to protect ducts from sound

If duct work is open to sound, it is better to cover it using a drop down box called soffit. After framing the duct with soffit wrap it with a couple of layers of drywall. The dry walls can have green glue applied in between.
If you cannot avoid exposure of duct to sound, choose circular duct instead of rectangular duct. Circular ducts are more efficient and it will be helpful to coat the duct using a viscoelastic material. Thin metal ducts do not prevent airborne sound, and hence avoid their exposure.

5. Coating a duct

Coating with viscoelastic material reduces structural sound in a duct but this is not a good alternative to lining the duct.

6. Exposed duct anywhere is not good

If it is important to have a duct work at a certain critical area somewhere along the construction to be exposed to the air then take care to seal the duct work joints. Also coat the duct work using a thick viscoelastic coating to lessen noise transmission. If required you can take more effective measures such as covering the bare duct with M L V (mass loaded vinyl).

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How to Treat your Home Theater like a Real Theater by quality acoustical products and materials control echo

How to Treat your Home Theater like a Real Theater
During the process of upgrading your home theater, you may have discovered that your TV speakers are below par and if you want to upgrade the quality of the audio you have to introduce some extra sound system. The important thing is how to improve the acoustics of the room itself. An ideal theater should treat the space acoustically so that the listener can hear whatever that is happening clearly. This article discusses some methods of getting the big theater feeling in your home theater.
Bass Traps
Low frequency causes one of the common problems faced in any room of any size. Place bass traps in all the corners. The more the corners that you cover with brass traps, the better the bass response you get. By allowing bass frequencies to build they become unclear and undefined, so better trap them.
Few bass traps also absorb broadband which means you save on the absorbers required. Bass traps by themselves can solve several problems in the room, and because of the ease of implementation, it is recommended to begin with it first in the main corners with fabric wrapped absorbers. They are good and look good as well.
Broadband Absorption
The energy of sound waves reflecting from the hard surfaces of the space and coming back to you after a delay can be removed by broadband absorption. To decide where to fix the absorbers, a mirror held flat on the side wall is moved around by a friend or helper, till the images of the speakers are seen from your seat. Mark this position on the wall and repeat this process from the other seats to know the path of reflections. Absorbers are fixed on these marked positions all around. Also, fix them on the wall behind the speakers. A carpet on the floor and absorber clouds hung from the ceiling are not to be forgotten. Broadband absorbing panels are fabric wrapped to match with the fabric wrapped bass traps in size, design and colors. Do not cover more than 50% of the walls with absorbers as it may cause a muffed deadness.
Diffusers
Having controlled excess sound with absorbers, removed the undesired reflections and restricted the bass, the next step is to enliven the room by diffusion. Diffusers help to scatter the energy, creating a better ambiance with the remaining energy. This step, without removing energy from the room, just redistributes it into the room giving you a feeling of open space
Conclusion
Advances are taking place continuously in acoustic treatments. New methods and products are being introduced making your theater acoustically better. Use the above tips to change your home theater into a real theater and enjoy the difference.

Gun Range Soundproofing by quality soundproofing products

Gun Range Soundproofing
Gun range or shooting range is a bounded firing range equipped with targets for practicing shooting with handgun or rifle. The impact of a blast of firing from a gun range can cause a serious threat of hearing loss to the shooter, and set off complaints from dejected neighbors. The aim of soundproofing is to regulate the degree of exposure of neighbors, and also to provide hearing protection to the weapon operator, and meet the acoustic demands of the nearby community.
Soundproofing Treatment-Outdoor ranges
For shooting ranges located outdoor suspend quilted outdoor sound control blankets surrounding the firing station. This will restrict the noise, shield the neighbors, and also regulate the level of exposure of the operator using the weapon. Areas like pole barns if any, located close by may be protected by suspending these blankets and the entire area isolated. For the outdoor pole barn, hang the quilted blankets to be used as portable sound screens. Then line the interior using pyramid panels or suspend vertical fiberglass baffles covered with PVC skin.
Indoor Range Treatment
For treating indoor gun ranges, use quilted indoor sound control blankets suspending them from the wall top along the full perimeter to protect against the leakage of noise. Melamine foam sound panels which are fire proof can be stuck to the ceiling for absorbing the energy confined in the room.
Soundproofing Results
The treatment of surrounding walls with sound barriers can cause a drop of 12-15 dB. Treating the room interior with absorption panels will protect the gun operator by lessening the sound reflections within the room.
Shooting Stations
In case of outdoor ranges, understand that unless the full shooting range is protected, you cannot fully eradicate the possibility of exposure of neighbors to the high sound level. Your aim should be to control the problem better by making partial enclosures using blankets surrounding the shooting stations. Quilt blankets combat the directional sound, for outdoor treatments very well. Each shooting station is covered with the blankets cut to size over a framework built around the four- sided station with a top covering too. The rear side is left open in the direction away from the neighbors whom you are protecting. An opening is made in the front for the barrel and the shooter for firing through. For treatment of indoors, the blankets are grommeted and hung to the ceiling and walls to produce a padded chamber that doesn’t allow the noise out. The blankets can also be used to line the shooting stations to safeguard the multiple gunners from the other’s noise.
If you’re constructing the shooting range afresh, put up a staggered-stud type frame lining it with special sound blocking and isolating membranes to retain the noise within. You do not need the sound blankets in that case but you may need the pyramid panels to absorb the noise energy remaining within the room.

Electric Cars Will Now Be Required to Make Noise – But Sound Takes Energy to Make!

Electric Cars Will Now Be Required to Make Noise – But Sound Takes Energy to Make!
Every new technology has both good and bad sides. Nothing is perfect, particularly as those innovations and new technologies evolve. There is a view point that we need all-electric cars, so that we will avoid foreign oil and fossil fuels. That seems like a fantasy. It is known that battery power is not efficient, unlike fossil fuels which have a lot of energy.
The Main Issue
Still, due to the fear of global warming, the new global tilt towards alternative energy and the environmentalists, this idea of electric cars run on battery persists. There are some important issues with battery technology. First, they need certain elements, and those things do not come cheap, and they are not mined everywhere. Those countries which are mining and treating these raw materials exploit these resources to their advantage politically. Research is on for finding better battery technologies. If this succeeds, a battery having a strong conversion rate that can deliver efficient power we need can be produced and then perhaps, some of the problems of reliance on foreign oil may be solved. But still it cannot replace that fuel.
The Noise Issue
There is another new problem, a problem that was not anticipated, but was discovered a decade ago. Electric cars are very quiet. Pedestrians and bicyclists cannot hear them, so they are more likely to be killed. We do not want this to happen. One solution is to make the electric cars make noise. It would be an extra feature and that needs extra energy. Even a focused noise directed towards the front of a car needs energy. Speakers and amplifiers take energy off of the batteries in your car. That means your batteries will get drained faster and the car cannot give the mileage that you anticipate. That means more batteries are needed for your car, the car weight goes up, it will need more energy and hence, more batteries. The point is, from a physics point of view, batteries are inefficient, and to make noise, it takes energy.
Conclusion
The entire issue is about energy efficiency, energy conversion, and a substitution and solution to fossil fuels, which possesses plenty of energy. This problem has to be addressed and this challenge must be faced, and if we do not succeed to find viable solution, we must abandon the electric car idea and stick to what works really and should not live in a fantasyland. If we intend to go for electric cars we must make them extremely lightweight, very efficient, aero dynamic with the high-tech materials used to build jet fighter planes. All that will cost lot of money, and as the consumer; one may wonder what the return on investment will be.

DB-Blocks acoustical soundproofing products to control noise

dB-Blocs and dB-Drapes

Soundproofing a Common Surface with dB-Bloc

dB-Bloc is an ultra-dense, ultra-thin, mass loaded vinyl soundproofing membrane that is encrusted behind a drywall to stop sound bleeding through shared walls and shared ceiling / floor assemblies. A 54″ wide and x 30′ long roll weighs more than 150 pounds an can cover an area of 135 square feet measuring only 1/8” thick. By using this acoustic material you are adding to the weight of the shared surface so that the vibrations collapse. Imagine you are keeping your hand on top of a vibrating guitar string, a drum, or a wine glass, and see how the weight of your hand deadens the vibrations, and in turn deadens the noise generated. Attaching dB-Bloc to a shared ceiling or wall surface will have similar effect.

dB-Bloc has been designed to be encrusted at the rear of drywall together with some form of disconnection. If you are working on a finished surface, just staple dB-Bloc to that surface, fix a system of furring strip or channel and then attach the drywall over it to finish your installation.

In the case of a building under construction have a double walled structure or a staggered stud group in place of a furring strip arrangement to effect the disconnect. The dB-Bloc can be added to the frame later and install a drywall over it.

A Properly installed dB-Bloc for soundproofing can change a wall with S T C rating of 38-40, to one with S T C rating of 55-60. This is considered as soundproofing luxury grade by the authorities. Leakage will spoil all the efforts put in on any project. Any shared surface that has common electrical, ventilation and plumbing, or adjoining untreated walls, ceilings, floors, hallways, windows, stairwells, doors etc., will collectively leak noise.
It is not possible to totally eliminate sound by isolating a room from the adjacent one, but you can control it better with the help of dB-Bloc membrane. Normally, the soundproofing treatment enables a drop of 10-12 dB.

dB-Drapes Sound Curtains

dB-Drapes are solid sound blocking curtains made from strengthened mass loaded vinyl which are designed to withstand their self-weight. They are suspended vertically to isolate loud noise in industries. These sound insulation curtains can isolate and combat airborne type sound waves. The noise reduction from these sound deadening free-hanging blankets can effect a drop of 15-20 dB or more. These dB-Drapes are fire rated as class A, portable and are available as 54″ x 30′ rolls.

dB-Drapes are only sound barrier material and not the absorbing type. They are good for separating two acoustic spaces, but are not as good as sound blankets. Blankets block noise and also absorb the energy caught inside the enclosed space, but dB-Drapes won’t. They are better used as hanging sound barriers, but they are not good enclosures.

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