As a player listening to the living room, you are not in a hurry to burn high-priced equipment. Rooms that have not been acoustically treated will greatly deteriorate your system performance. This deterioration is very deep and has nothing to do with equipment. Thousands of amps, buy a few hundred thousand fever wire can be changed.
If you are pursuing excellent listening quality, you should attach great importance to indoor acoustic treatment. If it is a big burn, I think that the money spent on acoustic treatment should not be lower than the money spent on equipment. I am a movie hobby. In order to debug the home theater, I read some information. Now I will sort it out and give some reference to those who are just getting started to improve the listening effect.
First, let's talk about the characteristics of sound transmission and speaker sound.
Since the sound comes out of the speaker and follows the characteristics of spherical propagation, the distance is doubled. For example, if you are 1 meter away from the speaker and back to 2 meters, the sound pressure will drop by 6 decibels. From 2 meters away from the speaker to 4 meters from the speaker, the sound pressure will drop by 6 decibels.
According to the characteristics of the speaker, the power input to the speaker is doubled, and the sound pressure generated by the speaker is increased by 3 decibels. For example, input a signal of 1 watt to the speaker, the speaker emits 88 decibels of sound, input 2 watts, the speaker emits 91 decibels, inputs 4 watts, emits 94 decibels of sound, and so on.
Input 1 watt signal to the speaker. In the anechoic chamber, the sound pressure level measured at a distance of 1 m from the front of the speaker is the [sensitivity] of the speaker. At the same time, the human ear has a shadowing effect, that is to say, when two different frequencies of sound are heard at the same time, the one with lower loudness will become very insensitive or even inaudible. For example, when talking indoors, it is difficult to pay attention to it. The sound of the fan of the computer case, while in the quiet night, the sound of the fan is very obvious.
Thus, in a room with assuming a width of 3 meters, you place a computer table and a set of speakers against the wall. You are only about 0.5 meters away from the speaker on the computer table, and the speaker makes a sound, passing 2-3 meters. Go to the back wall and return to your ear after about 2 meters after the reflection. Actually, you have already passed the distance of 4-5 meters.
0.5--1 meters down 6
1-2 meters down 6
2-4 meters down 6
The sound has dropped by at least 18 decibels, and the indoor environment absorbs sound. Actually, when you are closer to the speaker, most of the sounds heard are from the speaker. The ambient sound is much lower than the direct sound level. The sound will also be hidden because of the shadowing effect, but it will be ignored.
This kind of listening scene, called [near field], you can think that in this environment, the sound you hear is all the sound directly from the box.
And when you move the speaker to the living room, because the listening distance becomes farther, the distance from the back wall becomes closer, and the difference in the distance between the reflected sound and the direct sound is small, so the ambient sound cannot be ignored.
The following: "How to maintain the correct home theater HIFI listening concept", "simple home theater room acoustic processing, enhance listening experience", "home theater indoor frequency response, reverberation and standing wave problem analysis", "from entry to Proficient in one-stop navigation of home theater knowledge.
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