sound insulation Articles

  • Article: Inadequate Sound Insulation: Does the Law of Nuisance Provide an Effective Remedy?

    This paper begins with the basic premise that noise is an inescapable feature of modern life and considers how inadequate sound insulation exacerbates the problems associated with noise pollution. The obvious mechanism for ensuring that buildings are constructed so as to provide sufficient sound insulation is the building control regime contained in the Building Regulations. The paper proceeds to ...


  • Does my site, house, or flat need a sound test? Sound Insulation Testing requirements.

    Approved Document E:  Resistance to the passage of sound’ governs the sound testing requirements for newly built, and refurbished dwellings, as well as newly-built and refurbished ‘rooms for residential purposes’ (e.g. hotels, student accomdation) constructed since 2003.  (link here: ...


    By Acoustic Tests

  • Top 5 incineration myth busters

    There are a lot of myths and misconceptions out there when it comes to incinerators and with many people feeling uncertain of what they actually need when in a position to purchase a incinerator, it is sometimes difficult to tell fact from fiction.  Every day we have multiple phone calls from existing and potential customers asking the same ...

  • Biofuels not as green as they sound

    Untitled Document EEB Position Paper on the Draft Directive on the promotion of the use of biofuels for transport and the Draft Directive amending Directive 92/81/EEC with regard ...

  • Recording audio with level triggers - Sound Level Meters

    Recording audio from a sound level meter measurement is sometimes necessary. Perhaps you need to listen to identify the source of a noise or for post-processing – or even to play back to a project stakeholder. If a measurement is short, it’s easy enough to record audio for an entire measurement and afterward crop the relevant parts. However, measuring for days, weeks or months, ...

  • Case study - Filming sound leakages in highly reflective office environment

    Problem A newly built office complex is designed with glass facades between the offices and the hallway. The glass facades include a glass door. Although the glass structures themselves have a sufficient sound reduction value, the sound insulation between office and hallway was measured at 19 dB, which was far below the sound insulation criteria for offices given in the regulations. It ...


    By Norsonic AS

  • A study of the coincidence effect and critical frequency of a dash panel using the hybrid FEA–SEA and experimental methods

    This paper provides a new method to determine critical frequencies of any engineering structures by identification of peak frequencies of their internal damping loss factor curves. The novelty embodies the following aspects: first, the indirect method was applied to measure the critical frequencies of large complex thin–walled panels; second, the hybrid FEA–SEA was applied to analyse the sound ...


    By Inderscience Publishers

  • Shanghai International Gymnastics Center case study

    223’ (68 m) diameter CST Covers Aluminum Dome and matching lower facade National and international gymnastics competitions The 4,000 seat gymnastics center/arena was built for the eighth National Games of the People’s Republic of China. The mill finish CST Covers Aluminum Dome roof is engineered to support 45,000 kg or 100,000 pounds of sound cloud and catwalk loads. The ...


    By CST Industries Inc

  • Controlling condensation- controlling mold

    You know those water stains on the ceiling tiles in your office that you are certain are caused by a leaky roof. Of course, the maintenance man thinks your crazy, since your office is not on the top floor. He dutifully changes the ceiling tile and a month later the water stain is back but this time it has those little black circles that look like mold colonies. Sound familiar? There seems to be ...

  • Controlling condensation - controlling mold

    You know those water stains on the ceiling tiles in your office that you are certain are caused by a leaky roof.  Of course, the maintenance man thinks your crazy, since your office is not on the top floor.  He dutifully changes the ceiling tile and a month later the water stain is back but this time it has those little black circles that look like mold colonies. Sound familiar? There ...

  • Enhanced acoustic material testing in a tube

    Demands from the Industry   A growing number of customers demand quieter vehicle cabins, and cabin acoustic comfort has become a major concern for the automotive industry. Optimization of the acoustic insulation performance has, therefore, been given a more prevalent role in the design process. In the aircraft industry, acoustic comfort for customers and the use of new, lighter ...

  • Case study - Measuring impact of traffic noise in apartment living room

    Problem An apartment on the ground floor of a two story house in the city lies close to a busy road. The living room in the apartment is facing the road, and the inhabitants are bothered by traffic noise, especially in the morning and the afternoon, when the traffic is the heaviest. Traffic noise could be clearly heard when standing in the living room. The facade facing the city ...


    By Norsonic AS

  • Case study - Finding acoustical weak points in room dividing modular walls

    Problem A conference hotel is using modular walls to divide large halls into several smaller conference rooms. The rooms are divided by modular walls that provide several different opportunities for subdivision and multipurpose use of the large area spaces. When measuring the sound insulation between adjacent rooms through the modular walls, the resulting value was found to be too ...


    By Norsonic AS

  • Where does the oil go after treatment with the SRA?

    Oil is necessary in a refrigeration unit; it is needed to lubricate the compressor pump. Over time, much of this oil has circulated through the pipes of the refrigeration circuit and clings to inner walls of the pipes that carry the refrigeration liquid or vapour. The American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE) calls the oil that clings to the inside walls ...


    By Power Knot LLC

  • Case study - Wall leakage testing in the lab with acoustic camera

    Problem Facade insulation testing is usually performed by using a loudspeaker in the sending room, and record the sound pressure level (SPL) with microphones in both the sending and receiving room. The difference in SPL adjusted for the size of the dividing wall element will then give an estimate of the sound reduction quality of that element. However these measurements will not say ...


    By Norsonic AS

  • Elements for a Position Paper on Night-Time Transportation Noise and Sleep Disturbance

    The EU Directive on the Assessment and Management of Environmental Noise (END) specifies Lnight as the indicator for sleep disturbance. This report presents relationships between Lnight and sleep disturbance for transportation noise. These relationships can be used in a position paper on relationships between Lnight and sleep disturbance for transportation noise by the working group 'Health and ...


  • GKN aerospace success with portable impedance meter

    The GKN site in Cowes, Isle of Wight, UK, has long experience in the design and manufacture of passive sound insulation systems for air-intakes and by-pass ducts of aircraft engine nacelles. Dr. Armando Vavalle, Technology Development Engineer from GKN reports here on impedance tests conducted with Brüel &Kjær’s Portable Impedance Meter Type 9737 for the development of such ...

  • Magic Power: Copper Cable Granulator

    Do you want to turn waste into treasure? It sounds a fairy tale in a magic world. But it can really come true with the help of copper cable granulator. As we all know, the value of bright copper wire is 4-5 times that of insulated wire. If we have our own copper cable granulator, we can win extra ...

  • Why Is the Wire Stripping Machine So Popular?

    Wire stripping machine, as an environmentally sound and less costly process for material separation, is widely accepted worldwide. Many developed countries use these machines rather than the more expensive cable chopping machines in  ...

  • Magic Power: Copper Cable Granulator

    Email: annaamisy@gmail.com Do you want to turn waste into treasure? It sounds a fairy tale in a magic world. But it can really come true with the help of copper cable granulator. As we all know, the value of bright copper wire is 4-5 times that of insulated wire. If we have our own ...

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