Now, many audio refitters and audiophiles will use home audio as the reference object for evaluation. In fact, this is a good thing. The sound field positioning and music reproduction of home audio are indeed the goals pursued by car audio, but in a small space of the car The on-site sound effects produced are by no means comparable to ordinary home audio.
One: Compared with ordinary rooms, the volume of the carriage is only a few tenths. For example, Guangzhou Honda Camry's 08 200E cabin space is less than one-twentieth the volume of the 20-square-meter audiovisual room. Because the space is small, the distance between the person and the speaker is quite close, and the energy of the sound is attenuated in logarithmic times with the increase of the frequency. Yes, but you can feel it at close range in the car:
Second: The position of the speaker of the car audio system is very asymmetric to the position of the listener, while the room listening is basically symmetrical to the position of the listener, and the installation space and position are also restricted, so in terms of listening sense The sound field will be biased towards the speaker closer to the listener, and the positioning and presence of the audio image will be relatively poor.
Third: The sound absorption characteristics in the car are also different. The absorption of sound by various materials is different, and the absorption of each frequency by the same material is also different. Therefore, due to the different materials of interior decorations and seats, it will have a certain impact on the sound effect. The decoration in the general car, the skin material such as the seat, roof and floor are cloth and carpet, the inside uses synthetic leather, as well as the listener, doors and windows, etc., in the middle and high frequency will form more complex sound absorption characteristics, in The mid-range and high-frequency sounds will be stronger, so the softer mid-range and high-frequency music will not easily make people irritable and tired.
Fourth: Vibration sounds, brake sounds, engine sounds, etc. when the car is driving, will have an adverse effect on the listening effect of the audio. Therefore, the sound quality effect is deteriorated. If the sound reproduction performance of the speaker itself is relatively poor, then the music will definitely not be heard. Based on the above situation, the sound of car speakers, especially mid-high frequency speakers, must be full, soft and delicate. Otherwise, it can only be a good-looking but unusable decoration.
The initial design of indoor fixed installation Led Display Screen mainly designs the size and model of the screen body according to the site conditions. The screen body size can be designed as 16:9, 2:1 or 4:3, etc. if the scene requirements are relatively long, multi screen display or screen cutting display can be designed. The screen model is generally based on the closest distance between the front row audience and the screen. Generally, the product of what model is used for the distance of how many meters, such as pH4 for the distance of 4 meters, pH2 for the distance of 2 meters, etc. Such a choice is also the most cost-effective.
Indoor Fixed LED Display features:
1. The screen body is not only reliable for wall installation, with a thickness of 7cm, beautiful and generous appearance, but also flush with the decorative surface to achieve the integration of screen and wall;
2. Light weight, only 10kg per square meter, suitable for any wall installation;
3. The Led Display adopts magnetic absorption structure, front and back maintenance, fast and safe;
4. For the same wall, choose a variety of models. According to the needs of customers, you can choose products with small spacing of P4, P3, P2 and above.
5. The cost is low, because there is no need to move, so the case structure is not needed, which greatly saves the cost of the box;
6. Various installation methods, including wall type, hanging installation, vertical installation, inlay installation, cantilever installation, etc. are selected according to the scene. Each installation method corresponds to different designers.
7. Different use scenarios can be used in one side, two sides, three sides or even more.
Application scenario: large airport, hospital, hotel, banquet hall, 4S shop, sales office, etc.
Screen structure: indoor fixed installation screen adopts high-strength magnetic absorption structure, with good front heat dissipation effect, no fan structure, no noise. Screen frame can be selected according to customer's requirements, such as black titanium, rose gold and so on. The inner part of the screen has been assembled with wire, and the outer part only needs to be connected with network cable and power cable.
Precautions: the screen body is not waterproof, and it can prevent sharp things from bumping.
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Shenzhen Vision Display Technology Co,.LTD , https://www.ledvdi.com