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160W solar panel, PV solar panel, Solar panel, Silicon solar panel 160W Jiangxi Huayang New Energy Co.,Ltd , https://www.huayangenergy.com For many years, most enthusiasts, or self-proclaimed enthusiasts, have done some processing for their listening environment in order to improve listening conditions and make it beautiful. Then someone put a felt on the wall and put two SOUND TUBE in the corner. There are also some SONEXs that are bought at a price that are expensive and placed on the left. And some will buy some hippocampus sponge pads (of course much cheaper) but they can achieve similar results. Some more, like the author more than a decade ago, picked up a lot of paper cards for eggs, sprayed them with different colors, and then on the wall, the ceiling, one by one, the effect is quite Not bad. Some friends have heard me say that there are several pots of plants in different locations in the home. If the sound is good, the acceptance of other family members will be higher. Well, all these measures are basically to play the role of tuning. In extreme terms, it can only be used for sound absorption, but it must not play the role of sound insulation. why would you say so? Because this is indeed the illusion of many enthusiasts, everyone is thinking that since the sound is sucked, isn't it just running away? But the cruel reality is this: the sound sucks away only the wishful thinking of the people. Yes, the above-mentioned various measures will really suck. "A little bit of sound, but the amount of suction and the remaining comparison are negligible. . Strictly speaking, the sound is absorbed from the sound energy into another energy (usually heat). In the listening room, if you talk about the energy of the sound, the engineer will smile and tell you that this is not the case. Justified.
But if you are a more serious fan, the sound insulation may have a deeper meaning for you. In professional recording and listening, sound insulation is a very important topic, and there are many universities asking. Here is a simple example. When we listen to music with headphones, in addition to the sound field pointer, you will find that whether it is frequency domain, or transient, dynamic, fineness of music, etc. can be easily Better than the speakers in our home. Why is the difference between the two? There are many reasons for this, and one of them is that the sound insulation conditions of the two are very different.
We usually listen to HiFi at home, and the sound pressure is generally maintained at 90 to 100 dB, and then the family or neighbors will complain. Here, on the one hand, the sound pressure of the sound, close to 110dB is the upper limit of the general home, in this range the equipment is very prone to fatigue, and on the other hand, as a listener may be happy, but once longer Time is exposed to strong sound pressure, our ears are already at the limit of the sound pressure, so our hearing sensitivity, such as analytical ability, will become dull. In the general urban home, the environmental noise is not low, and the smallest is about 40dB. If it is so prosperous and densely populated in Hong Kong, it will be more than that. So let's see if we listen to music at home, the sound pressure is maintained at 100dB and the neighbors can accept it, minus the noise level (Noise Platform) 40dB, so the remaining available dynamics is only 60dB. In general, 60dB of available dynamics is quite good, but equipment, especially speakers, often have inaccurate performance when they are at the limit, so we will feel the sound is not very good. If you want to increase the dynamics, for example, increase to 65dB, then the upper limit of the sound pressure will be increased to 105dB. At this time, the nonlinear distortion of the equipment will increase in geometric progression, and your hearing will become less fascinating at 105dB. So when you add up, you will feel bored. Here, smart readers may have thought, why can't the noise step be reduced? Yes, if the noise step is reduced by 5dB, that is, 35dB, so when the upper limit of 100dB sound pressure is maintained, the upper dynamics will be 65dB. At this time, compared with the above example 105dB, the equipment and our hearing are not in a state of fatigue, so the listening quality is It will have an order of magnitude improvement over the 40dB noise step and the 105dB sound pressure limit. Readers will also know that the sound will be better in that case. To reduce the noise step, you have to talk about sound insulation.
We know that on this planet, sound conduction is basically carried out in the air. So in a vacuum without air, everything will become dead. Some readers will disagree because in his Dolby Digital 5.1 system, when watching "Star Wars", it is a ground shake. Sorry, you lied to the movie. The real Star Wars can still only be silently in the dead.
To sound the sound, simply put, it is to break the path of sound conduction. At this point, the reason is obvious and easy to understand, but it is not easy to do well. Since the sound is conducted by air, the primary condition for sound insulation is to block the air in the listening room from the outside air, in other words to seal the listening room.
Split air conditioners should be installed as large as possible, so that the machine can cope with the long-term slow speed, and the mechanical noise generated will be less. On the other hand, the fresh air supply in the listening room should be maintained. The air conditioner has a larger cooling capacity. Everyone should pay attention to the fact that the general window air conditioners have fresh air supply equipment, but there is no such equipment in the split. What is more, the average person does not think so at all. Therefore, for your health, I want to install the split. When the air conditioner is used, the master should pay attention to solve this problem. Generally speaking, the master will, when you are struggling to ask for it, install a suffocating fan somewhere in the room and collect money from you. In doing so, your health will be guaranteed, because there is a fresh air supply in the listening room, and it is not a problem to have a fever for a few hours. However, if you spend a lot of money in order to receive the sound insulation effect, you will destroy this small exhaust fan. The correct way is to install a professional-grade exhaust system, which includes a large-sized exhaust fan that works at a slow speed. This is to ensure that its noise is low, and that the delivery/exhaust pipe is quite long and has a Sound function, its structure will be like the structure of the labyrinth speaker, the pipe is glued to the sound absorbing material, the principle is the same as the muffler of the car (dead throat). Finally, the installation of air conditioning should pay attention to is that the air outlet should be installed in the wall behind the main speaker, farthest from the listener.
Followed by replacing the door of the listening room with a solid wooden door not less than 50mm thick, preferably without a metal door, and the door frame should be glued with a sealing strip. If the conditions permit, it is more effective to double-door processing in the professional recording room, that is, to open the outer door and enter only a small storage room, and then push the inner door to enter the listening room. It is the structure of the wall, which is no problem in the city as long as it is a brick wall or a concrete wall. Being a listening room is completely acceptable. Of course, professional, the structure of the wall has certain regulations.
The last thing to talk about is the de-coupling of the sound-emitting device (mainly the speaker) and the listening room. This is also important. The sound is transmitted faster and more efficiently in the air than in the air. If you put the speakers directly on the ground, your neighbors still have a chance to be harassed. Some friends have tried this kind of experience. When they go to bed every night, they hear loud music and can't be awkward. They complain to the management office about the upstairs guest. The management office answers that the upstairs is vacant. In the end, I was struggling to trace it. It turned out to be the sound of a unit on the third floor that shared the same bearing wall with his unit. It's easy to get back the speakers, as long as you use the studs made of multiple materials to pad the speakers. Your neighbor downstairs will thank you for this. How much will the noise step be reduced when you complete all the above? About 10dB? ! This is too expensive. 