First the ceiling weight (kg/m2) is defined by calculating the plasterboard total area density (kg/m2) by summing up the plasterboard weights. As the ceiling weight (kg/m2) is known below table gives the support distances P and T for the InfiniSpring® acoustic hangers. 

Support distances P and T are shown in the below picture. Also maximum allowed support distances A, P and T for GK 60 mm ceiling system are shown below. Distance P is the distance between the upper ceiling profiles. Distance T is the distance between the acoustic hangers in the ceiling profile. Distance A is the distance between the lower ceiling profiles.

Using previous support distances the suspended ceiling can be assembled. In case of heavy objects additional hangers are needed, but they can be simply added close to the objects. InfiniSpring® acoustic hanger can take loads up to 25 kg and for example a 50 kg speaker requires two additional InfiniSpring® acoustic hangers close to the speaker location.

Example: a 7m x 10 m size ceiling utilizes two layers of plasterboard with following area densities: 1 x 10 kg/m2 and 1 x 15 kg/m2. How are acoustic hanger support distances and acoustic hanger amounts defined?

• The plasterboard total area density is 10 kg/m2 + 15 kg/m2 = 25 kg/m2 (ceiling weight).
• The support distances for the 25 kg/m2 can be checked from the above table: P = 1000 mm and T = 1000 mm. Lower GK 60 mm ceiling profiles are installed using A = max. 400 mm.
• The support distances (1000 mm x 1000 mm) mean that one acoustic hanger is needed for a square meter area.
• The total area of the ceiling is 7 m x 10 m = 70 m2 and the total number of InfiniSpring® Acoustic Hangers is 70 pieces.

After the support distances and acoustic hanger amounts are known suspended ceiling installation steps are as follows:

1. 1. Acoustic hanger ceiling connection parts are installed to the roof using support distances from above.
2. 2. Acoustic hangers are connected to GK 60 mm ceiling profiles.
3. 3. Ceiling connection parts are connected to acoustic hangers.
4. 4. GK-ceiling system is assembled using manufacturer’s instructions.
5. 5. Plasterboards are lifted against the GK-ceiling system and plasterboards are fastened.

With these steps the suspended ceiling can be completed. For the soundproofing it is always important to make the ceiling airtight, but still allow the plasterboard ceiling to move freely on the acoustic hanger springs. Suitable mass or elastic material is required to air tighten the plasterboard ceiling sides and other possible inlets. Also, for example air ducts need to allow the suspended ceiling and acoustic hanger springs to move freely. One option is to use flexible bellows or install ducting flexibly using InfiniSpring®-springs.

Acoustic Products Installation Instructions with pictures can be found from the Product page. If you have any comments or questions, please do not hesitate to contact us.

The post How to calculate suspended ceiling? appeared first on InfiniSpring.

We have state-of-the-art competences in machine design and structural dynamics. We have done research and development in steel structures, fatigue and finite element analysis. We also manage coding and have been using Python Programming Language for developing simulation procedures.

We have CAD and Finite Element Analysis (FEA) software in use. With FEA we can perform structural simulations. It allows us for example to simulate running machinery and optimize machine structures. With the machine structure optimization, we can guarantee that harmful vibrations are not excited and structural stresses remain low. Simulations also enable us to come up with lightweight structures even for heavy duty machines. With CAD we can make manufacturing drawings and assembly drawings required to build the machines/products.

We are innovative engineers, who can come up with innovative product designs, but also provide broad-ranging support in many areas. We know a great deal about manufacturing, welded steel structures, quality control, structural repairs, machinery installations and high sampling rate measurements. If you think that we and InfiniSpring®-spring design could offer you new possibilities, please do not hesitate to contact us.

The post Design Services appeared first on InfiniSpring.

1. Add Mass: High mass/density materials such as plasterboard can be used. Acoustic plasterboards have higher density than standard plasterboard. Also different plasterboard masses soundproof different frequencies and different masses are often beneficial.
2. Add Attenuation: Ceilings, walls, and floors can be decoupled using springs to add sound attenuation.

InfiniSpring® Acoustic Products add attenuation by decoupling structures and function as low pass filters. We hear sounds from about 20 Hz to 20 kHz. This range is also a commonly referenced audio frequency range. InfiniSpring® Acoustic Products attenuate noise from around 14 Hz upwards and improve soundproofing in the whole audio frequency range.

Below are shown calculated attenuation percentages for InfiniSpring® Acoustic Products. Table shows the attenuation percentage for the audio frequency range from 20 Hz up to 20 kHz for an average 25 kg spring load.

At the 20 Hz frequency InfiniSpring® Acoustic Products attenuate around 75 percent of the 20 Hz low frequency noise. At the 50 Hz frequency attenuation percentage increases to 95 percent and attenuation percentage continues to increase as the frequency also continues to increase. Below picture shows sound attenuation curves for 15 kg and 25 kg spring loads in a frequency range from 20 Hz up to 100 Hz.

In practice InfiniSpring® Acoustic Products enable top level soundproofing in the whole audio frequency range (20 Hz – 20 kHz). It is also important to highlight that soundproofing needs to be always done with care and soundproofing requires always good solutions for the entire space. A top-level acoustic ceiling does not enable good soundproofing, if walls and floor allow noise to travel through the structures. Also, air tightness must always be secured in good soundproofing.

As a summary top level soundproofing requires mass and attenuation. Plasterboard provides mass and InfiniSpring® Acoustic Products provide the attenuation by decoupling the structures. With low stiffness InfiniSpring® Acoustic Products attenuate noise already from very low frequencies upwards. This is also the reason, why InfiniSpring® Acoustic Products can be even used in the most demanding soundproofing applications: music rooms, recording studios, cinemas, residential and office buildings, nightclubs, concert venues, industrial developments, and laboratories.

In case of any questions please do not hesitate to contact us. Next we will introduce how InfiniSpring® Acoustic Hangers are dimensioned and used.

The post How InfiniSpring® Acoustic Products Improve Soundproofing? appeared first on InfiniSpring.