Shanghai Sunland Industrial Co., Ltd is the top manufacturer of Personal Protect Equipment in China, with 20 years’experience. We are the Chinese government appointed manufacturer for government power,personal protection equipment , medical instruments,construction industry, etc. All the products get the CE, ANSI and related Industry Certificates. All our safety helmets use the top-quality raw material without any recycling material.
Solutions to meet different needs
We provide exclusive customization of the products logo, using advanced printing technology and technology, not suitable for fading, solid and firm, scratch-proof and anti-smashing, and suitable for various scenes such as construction, mining, warehouse, inspection, etc. Our goal is to satisfy your needs. Demand, do your best.
Highly specialized team and products
Professional team work and production line which can make nice quality in short time.
We trade with an open mind
24 / 7 guaranteed service
The professional team provides 24 * 7 after-sales service for you, which can help you solve any problems
Soundproofing and Noise Control Guide | Homebuilding
‘Airborne ,sound insulation, up to 68dB’ is what is offered. Needless to say, Saint-Gobain may have good commercial reason for promoting such improved standards because they sell plasterboard and ,insulation, — two of the main products required. But that doesn’t make …Get Price Send E-mail
Reducing Noise Caused by Poor Insulation – Part 1 – Noise ...
29/1/2019, · Whether it is purpose built or a converted property problems often arise. Property converted before the early 90’s, in particular, may have been completed with ,poor sound insulation, qualities (whereas after the early 90’s minimum standards for ,sound insulation, were put in place). There is also the chance that work is substandard.Get Price Send E-mail
Complaints about poor sound insulation between dwellings ...
1/11/1997, · The results obtained provide evidence of ,poor, standards of airborne ,sound insulation, in examples of recently built party walls where complaints about ,sound insulation, have been received. As the performance of the majority of these walls was less than the 'mean value' (a minimum Z)nT,w of 52 dB for walls) given in Approved Document E, the results also give some support for this value.Get Price Send E-mail
Four out of ten students experience problems with their ...
HRF believe that the problems with ,poor sound, environments are especially the result of ,poor, acoustics, bad ,sound insulation,, ,poor sound, engineering and improper room-layout. 1,527 students at five educational institutions in Sweden participated in the study. 80% were under 34 years of age.Get Price Send E-mail
Soundproofing Your Apartment - The Myths & What You CAN Do
No matter how much of an echo chamber your apartment is, this has nothing to do with soundproofing. If it sounds like noise is bouncing around your apartment, this is solved through ,sound, absorption NOT soundproofing. You can have an acoustically comfortable apartment full of soft furnishings ; but this won’t stop noise from entering your apartment and ruining a good night’s sleep.Get Price Send E-mail
Are the EarDial Earplugs Good for a Concert? | Tinnitus ...
8/4/2019, · Agree that foam ,earplugs, are better for a loud exposure as you describe. @linearb I use the foam ,earplugs, for vacuuming too. My vacuum is in the mid 80's for db's, and can go even higher in the hallways, corners and stairwells due to reverberation effects.Get Price Send E-mail
IMPROVING SOUND INSULATION IN HOMES
2004 should have been ,sound, tested or approved by Robust Details Ltd2. You may be bothered by your neighbour’s noise because: • you are unusually sensitive to noise • your neighbour behaves unreasonably • the ,sound insulation, between your homes is ,poor, While everybody sometimes hears some noise such as raised voices, laughter orGet Price Send E-mail
Blocking Exterior Sound To Reduce Noise Pollution ...
Research has shown dense acoustic roof ,insulation,, including stone wool flute fillers, are an effective solution to reducing ,sound, transmission through a roof. Connecting assemblies : Areas of deficiency for façade ,sound, transmission paths can be things such as roof soffits, vents, fans, air sealing details and probably many others depending on the type of façade system being constructed.Get Price Send E-mail
Acoustic properties of glass: not so simple | glassonweb.com
The higher the Rw index, the better the level of acoustic ,insulation, offered by that glass composition. The Rw index of ordinary double glazing is around 29 dB whereas a good acoustic interlayer offers an Rw index of around 50 dB. Rw is a single figure rating for the airborne ,sound insulation, …Get Price Send E-mail