perforated Sound-transparent screens and woven sound...

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Feb, Wed, 2025
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perforated Sound-transparent screens and woven Sound-transparent screens.

Whether it is a commercial cinema or a home audio-visual room, more and more cinema projects will use sound-transmitting screens. First, the overall appearance is beautiful, and second, the speakers can be placed in a suitable position according to the indoor environment to achieve better sound effects.

Sound-transmitting screens are mainly divided into two categories: perforated sound-transmitting screens and woven Sound-transparent screens.

Perforated Sound-transparent screens are mainly based on PVC material curtains, and holes are punched on the curtain surface. Woven Sound-transparent screens are just like the meaning of the text, using a weaving process.

Many cinema enthusiasts have a headache. Which of these two screen materials is better?

In fact, if a product can survive in the market, it means that it has a certain value, so there is no such false proposition as which is better between perforated Sound-transparent screens and woven Sound-transparent screens.

In terms of sound attenuation, woven Sound-transparent screens have an advantage over perforated Sound-transparent screens, because the holes of woven Sound-transparent screens are denser than those of perforated Sound-transparent screens, the perforation rate is higher, and the sound attenuation is lower, but this statement is based on the fact that the woven Sound-transparent screens are not added with black blackout cloth.

However, in terms of image effect, perforated Sound-transparent screen has an advantage over woven Sound-transparent screen, because the surface of woven Sound-transparent screen cannot be coated with gain. If it is used with a low-lumen projector, a large-sized woven Sound-transparent screen will have difficulty in image quality. This is why commercial theaters have always used perforated Sound-transparent screens.

After we understand the basic characteristics of these two screen materials, how should we choose the screens for our theaters in the process of building audio-visual rooms?

We can consider it based on such a mindset. No matter which one we choose, we will have gains and losses in terms of image or sound. So I suggest that we can make a comprehensive consideration based on the authoritative standards of the industry.

In terms of brightness, according to the standards of SMPTE (Society of Motion Picture and Television Engineering), the recommended brightness value for the center projection of 2D screens is 12~16fL (PS: the brightness of 3D screen projection is 3~4.5fL). In terms of sound attenuation, according to the IMAX standard, the perforation rate is 4.5%~6.3%.

According to incomplete statistics, most audio-visual rooms over 30 square meters use perforated Sound-transparent screens. Why does this happen?

Because audio-visual rooms over 30 square meters can basically use screens over 150 inches. Now people have higher and higher requirements for picture quality, so projector manufacturers have begun to gradually increase the contrast of projectors. In this way, the contrast is increased and the brightness is inevitably reduced. Therefore, more and more people are using perforated Sound-transparent screens with gain coatings, while woven Sound-transparent screens cannot be coated with gain on the surface, and the actual gain is only about 0.8, so in terms of brightness, it cannot gain an advantage over large-sized screens.

When choosing perforated Sound-transparent screens with gain coatings, do not choose too high gain, which is easy to cause the “sun effect” and there will be viewing angle problems. 1.0~1.8 gain is recommended.

At the same projector brightness, the illumination is 60 percentage points higher than the diffuse white screen without any coating, and the contrast is 34 percentage points higher. Since the pearl powder optical coating screen is a reflective digital screen, it suppresses the secondary reflection of the room better than the traditional diffuse white screen, and is significantly better than the diffuse screen in terms of picture sharpness (clarity) and black level (black level), making the picture sharper, better color reproduction, and better black level performance.

How to choose a sound-transparent screen that meets the standard of sound attenuation?

I mentioned above that in terms of sound attenuation, the woven Sound-transparent screen has an advantage over the perforated Sound-transparent screen, but that is without the addition of black blackout cloth. After adding the black blackout cloth, the sound attenuation of the woven sound-transparent screen at a high frequency of 8KHZ exceeds 5dB. Based on the brightness just mentioned, can I take into account the sound while ensuring the picture quality? Of course, as just said, as long as the sound attenuation meets the standard, we can also choose a perforated sound-transparent screen with gain.

There are now woven Sound-transparent screens with a nominal gain of 1.0 or above on the market. In fact, this data is false and not real. Because the woven screen material cannot be coated, the gain basically hovers around 0.8. However, some people have measured that some woven sound-transmitting screens do have a gain of 1.0. What’s going on? I believe the data is real, because there has also been a process of directly spraying gain coating on 4K woven screens, but in this way, the micropores on the screen surface will be covered by the coating, which means that the east wall is repaired, but the west wall collapses instead.

Let’s talk about the sound attenuation of perforated Sound-transparent screens

IMAX’s perforation rate standard is 4.5%~6.3%. If we can reach this perforation rate standard range, our sound attenuation is well controlled.

Summary

If you want better sound-transmitting,choose the woven sound-transmitting screen fabric,it is better to use brighter projector especially more than 150″

If you want better bright and have no brighter projector,especially more than 150″,it is better to choose the perforated screen fabric,usually white PVC perforated fabric