There are various sources of noise in the PC that can be contained with conventional solutions such as speed reduction and decoupling, but cannot be completely switched off. If you are at this point, i.e. have already taken various measures, but are still not satisfied with the result, you should consider the option of housing insulation. This method is also recommended, as a complete solution that saves you possibly more complex individual conversions.
The starting point of the noise is in all cases a specific form of movement or vibration that makes the air vibrate, but at the same time is transmitted via the hardware itself and in turn stimulates air elsewhere. Fan rotation leads to vibrations, for example, which are transmitted to the PC case via the frame and the air, stimulating it to vibrate, which also turns it into a source of noise.
This shows a fundamental phenomenon of the limitations of other noise reduction measures. They usually only start at one side of the problem - the vibration transmission via direct contact - and block out the transmission via air. Insulation mats initially contribute to noise reduction through their sheer weight. This is because they increase the mass of the outer parts of the housing, which is why the panels are not made to vibrate as much if the energy - i.e. the source of vibration - remains constant.
But insulation mats go beyond that by also preventing air vibrations from affecting the housing. The particularly soft material absorbs incoming sound waves, preventing them from vibrating the outer walls, and at the same time rapidly reducing the reflected sound.
As a result, they achieve an effect using two methods and are therefore more effective than conventional measures. This makes them the ideal route to noise reduction and the best way to reduce the noise generated by the PC.
The insulation mats are high quality products made in Germany and are also used for cabin construction. Their acoustic insulation effect is therefore also proven and sought-after in industrial solutions. They are made of soft PUR ester acoustic foam with a finely perforated synthetic leather on the top. This means that the mats are visually appealing, largely dirt-resistant and can be washed off. The underside is self-adhesive.
Sound absorption is particularly effective in the frequency range from 1,800 to 3,500 Hz. Between 1,200 and 6,000 Hz, more than 40 percent of the sound is absorbed, and at 400 Hz it is still ten percent. A broad spectrum is covered with these properties. Above all, the annoying high-frequency noise of many fans is particularly effectively reduced. Lower frequencies such as booming noises are less absorbed by the material itself, but are also minimized by its own weight.
This set is designed for the Lian Li PC-8E and contains 10 insulation mats. The insulation set can also be installed without special prior knowledge. This is ensured by precisely tailored and labeled insulation mats as well as precise installation instructions. This is specially designed for the requirements of the housing and explains step by step the installation, gives practical tips and explains the possibilities and insulation options.
The number of included mats is sufficient to insulate the entire housing - even the fan slots. As a result, you yourself have the choice of how much insulation you install in order to achieve an individual optimum of cooling and volume reduction.
Lian Li PC-8E Midi-Tower
Contents (custom- fit mats for):
The left side panel
Right side panel
Face-up (5.25-inch slots)
Face down (fan-slot)
Back up (fan-Slot)
Back down (besides PCI slots)
PUR ester-acoustic foam
Fine Art perforated leather (top)
Sound absorption per frequency range:
> 80%: from 1800 to 3500 Hz
> 40%: from 1200 to 6000 Hz
Temperature resistance: - 40 to + 100 degrees Celsius
Thermal conductivity: 0.04 W / (m * K) at 10 degrees Celsius
Good acoustic effect
Insensitive to dirt