Private Home Theater Projection Screen - Sound Transparent Screen

Thanks to the continuous progress and improvement of projector technology, three-dimensional sound technology, and home projection screen technology, more and more consumers are beginning to pursue an "immersive" movie viewing experience that combines sound and pictures and a real atmosphere. Bring home theater-quality audio and video—with your own private home theater.

The three elements that make up a home theater: projector, projection screen, and audio equipment
Simply put, the projector and projection screen determine the picture quality, and the audio equipment determines the sound quality. In essence, home theater relies on the combination of sound and picture to directly present audio and video to consumers. These two aspects are not a simple combination or even stacking, but need to be organically integrated to bring a sense of presence and shock of "sound and picture synchronization" and "sound and picture integration", that is, the immersive view that consumers want. Movie enjoyment.
How to realize "Sound and Picture Synchronization" and "Sound and Picture Integration"

A brief introduction to the binaural effect: the human binaural system can determine the exact location of the sound source based on the difference in the binaural sound, which is a bit like determining the location of an object with human eyes. In the home theater system, "accurate sound positioning" is the most basic requirement. Whether this positioning is accurate is based on the picture, so that the sound "penetrates" the picture at the appropriate position and transmits it to the audience, in order to achieve "sound and picture synchronization" and A true presence effect of "sound and image as one". Without this point, talking about the sense of presence and creating an immersive and realistic movie-viewing experience is tantamount to asking for fish. This requires placing speakers behind the screen (ie, front speakers) and a projection screen with a sound-transmitting function.
(There are speakers behind the picture, and the sound-transmitting curtain is displayed)
The function and function of the sound-transmitting projection screen
Sound transmission------transmits the sound of the front speakers to the audience by "penetrating" the screen
The sound penetration is good (the sound attenuation is as small as possible, less than 2db), and the high perforation rate (perforation rate is greater than 2%) is expected to transmit the original sound to the viewers
(Perforation rate and sound attenuation curve) Perforation rate = perforation density * round hole area% = 2.12%
Perforation rate is the percentage of the sum of the area of ​​all holes per square foot.
Perforation rate = the number of holes per square foot Px (aperture d) square x 3.1416/576x% (aperture d unit: inch 1inch=25.4mm)
Picture------projector projection picture carrier, truly shows the projection picture to the audience

The screen surface is flat, the screen brightness is uniform (greater than 85%), the large field of view (greater than 140 degrees), and the high gain is more than 1.0 (the larger the gain value, the higher the color brightness, the brighter the color), good color reproduction, high Resolution (HD 4K), low light loss ratio (light loss rate less than 2%)
(light loss ratio = perforation rate * 0.9635 = 2.04% perforation rate and light loss ratio curve)
The effect of the sound-transmitting curtain on the high-definition 4K image quality, picture brightness, and sound-transmitting effect:
4K is different from the so-called high-definition TV (1920x1080 resolution) we watch at home, and also different from the 2K resolution large screen (2048x1080 resolution) of traditional digital cinema, but a super fine picture with 4096x2160 resolution. The picture (HD) of traditional high-definition TV is 2.07 million pixels (1920x1080), the picture (UHD) of traditional digital cinema is 2.21 million pixels (2048x1080), and the picture of 4K resolution is high-definition with 8.85 million pixels. Picture, namely: 4K picture pixels = 4x2K picture pixels = 8x1K picture pixels.
4K resolution is an ultra-high-definition resolution. At this resolution, viewers can see every detail and close-up of the picture. The 4K resolution projection image means that the pixel value of each line in the horizontal direction reaches or is close to 4096 pixels. This requires the physical structure of the screen surface... The spacing of the reflective pixels is less than or = the horizontal size of the projection screen (mm or inch)/4096. For example, the horizontal size of the 16:9 100inch projection screen = 100*0.8715*25.4=2214mm/4096= 0.5405mm=0.0212inch
(with picture aperture 0.4mm, 0.2mm, hole spacing 2.56mm, and 2K, 4K pixel matrix diagram)
As can be seen from the above figure, the aperture size and aperture distance have a direct impact on sound attenuation, light loss, and resolution.
  (Perforation rate, light loss ratio, sound attenuation composite curve graph)
Because the sound-transmitting projection screen has certain phenomena of "sound attenuation" and "light loss", and has a direct impact on sound and painting, these two index parameters have also become important indicators for judging the quality of a sound-transmitting screen.
At present, there are two main types of sound-transmitting curtains on the market: woven sound-transmitting curtains and perforated sound-transmitting curtains (the difference between the two will be introduced later)
Problems encountered in the actual use of sound-transmitting projection screens Moire and stray light formed by transmitted light
Moire is an optical phenomenon of light interference. The light projected on the sound-transmitting projection screen is prone to form moiré patterns, that is, regular color rings. The appearance of moiré patterns will significantly affect the image quality and thus the viewing effect. The effective solution is to arrange the micro-holes in the vertical direction at a certain angle with the horizontal direction and adjust the projection distance of the projector and the focal length of the lens.
#WeavingSoundTransparent #PerforatedSoundTransparent

Stray light formed by transmitted light The projected light passing through the micro-hole will form a secondary reflection on the wall behind the projection screen, thus forming stray light on the projection screen, causing light interference and diffraction, which greatly affects the viewing effect. An effective solution is to place black gauze behind the sound-transmitting projection screen to effectively absorb stray light.(weaving sound-transparent + black backing)

How to choose an acoustically transparent projection screen
According to the environment and place of use:
1. Choose a projector.......

Telephoto**Short focus** (Consider the installation method of the projector, the projection distance, and the size of the projected image...choose the number of lumens of the projector) and personal budget. When choosing a projector, you need to consider the following Main factors: lumens (screen size), resolution and lens focal length (telephoto, short focus, and ultra-short focus), light source (LASER, LED, UHP)
2. Select the projection screen…………

Choose the type of screen according to the type of projector and the light intensity of the viewing environment, choose the anti-light screen for a bright light environment and choose more room for a dark light environment. Such as the preparation of sound-transmitting curtains, perforated sound-transmitting curtains, long and short anti-light curtains, etc.
Tip: Match the screen to the projector's resolution. Generally, the screen can meet the requirements of projection 2K image quality.
3. Selecting a projection screen......

The use environment and place determine the appearance and structure of the projection screen suitable for installation and the size of the projection screen. At present, there are a variety of projection screen appearance and structure options on the market, such as electric floor lift, electric, picture frame, ceiling hidden electric type, etc.
Special reminder: When choosing a projector and a projection screen, it is necessary to fully consider the matching of the projector, the projection screen, the environment, and the place of use, as well as the personal budget. The projector is like a horse, and the projection screen is a saddle. , A good horse must match a good saddle, and a good projector, if it does not match a good projection screen, there is no way to give full play to the performance of a good projector, which directly affects your viewing effect. important.

1. Recommended viewing distance
2. Recommended projection screen size and projector lumens matching value

1Ft=304.8mm 0.4mm hole area=(0.4/2/304.8) square*3.14
Punching density=16000pcs/ft²

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A sound-transparent projection screen, also known as an acoustically transparent screen or perforated screen, is designed to allow sound to pass through the screen material while maintaining visual quality. These screens are commonly used in private home theaters where speakers are positioned behind the screen to create a more immersive audio experience. Here's some information on sound-transparent screens and their benefits:

Material: Sound-transparent screens are typically made of perforated fabric or woven materials with microscopic holes or perforations. These tiny holes or perforations are strategically placed to allow sound waves to pass through without significantly impacting the visual quality of the projected image.

Speaker Placement: Sound-transparent screens enable you to position the speakers behind the screen, precisely where they would be in a commercial cinema setup. This placement ensures that the audio is seamlessly integrated with the on-screen action, creating a more immersive and realistic viewing experience.

Acoustic Transparency: The perforations or holes in the screen material are designed to be acoustically transparent, meaning they have minimal impact on sound quality. They allow high frequencies to pass through without distortion or attenuation, preserving the clarity and fidelity of the audio.

Visual Quality: Sound-transparent screens are engineered to maintain excellent visual quality. The screen material is designed to minimize light loss and preserve the brightness, contrast, and color accuracy of the projected image. High-quality sound-transparent screens can deliver a nearly seamless visual experience, with minimal visible impact from the perforations when viewed from a typical viewing distance.

Installation Considerations: When using a sound-transparent screen, it's essential to properly align the speakers behind the screen to ensure optimal audio performance. The positioning and calibration of the speakers should be carefully planned to achieve the desired sound imaging and localization. Additionally, the acoustics of the room, including wall treatments and soundproofing, should be considered to optimize the overall sound quality.

Sound-transparent screens offer the advantage of maintaining both excellent audio and visual performance in private home theaters. They allow you to achieve a more cinematic experience by placing the speakers behind the screen while preserving the visual quality of the projected image. When planning your home theater setup, consider using a high-quality sound-transparent screen that matches your specific requirements and desired viewing experience.