Five common senses of home theater audio

                                        Five common senses of home theater audio

Audio requirements

For an ideal home theater speaker, except for the subwoofer, it is best to strive for consistency in each channel. Although it is not required that the main channel and the center surround speaker be exactly the same in appearance and volume, at least the unit, characteristics, and timbre must be consistent. . If the speakers you choose to build are not from the same brand, there will be great differences between them in terms of appearance and sound. Because most of the dynamic and attractive blockbusters are recorded with surround dynamic sound effects. Dynamic sound effects include both moving sound effects and dramatic changes in volume and volume. In order to fully express the moving sound effect of the entire audio-visual space, speakers with high consistency can do it. According to the size of the audio-visual room, do not choose too large speakers for a small space, and do not choose a smaller speaker for a large space, so as to avoid economic waste and lack of performance.

What is 5.1 channel

As a home theater sound system, there are generally at least 4 channels, namely the left front, right front, left rear, and right rear channels. Better of course is 5-channel. 5 speakers form a surround speaker, which refers to the center channel, the front left and right channels, the rear left and right surround channels and the 0.1 channel subwoofer. The center channel speaker is responsible for reproducing the actions on the screen. Most of the time it is responsible for the dialogue of the characters; the front left and right channel speakers are used to compensate for actions that are outside the center of the screen or cannot be seen from the screen. and other sounds; the rear surround sound speakers are responsible for the peripheral and the entire background music, making people feel in the center of the entire scene. A total of 6 speakers can be connected to one system.

5.1-channel has been widely used in various traditional theaters and home theaters. Some well-known sound recording compression formats, such as Dolby AC-3 (Dolby Digital), DTS, etc., are based on the 5.1 sound system. "0.1" channel is subwoofer, also called subwoofer, subwoofer. The main purpose of subwoofer is to supplement the low frequency of the whole speaker system. It is a specially designed subwoofer channel. It can produce subwoofer with a frequency response range of 20-120Hz. The highest sound pressure level at the scene can reach 105dB, which can be said to be deafening. It can be said that no theater is complete without a subwoofer. As for how to choose a beautiful subwoofer, simply speaking, the larger the woofer diameter, the better, and the size should not be smaller than 30cm. Look at the technical specifications, and of course, listen to the effect. 7.1 system, which adds two pronunciation points of middle left and middle right on the basis of 5.1, in order to achieve a more perfect state. 7.1 The cost of the system is relatively high, so it cannot be widely popularized.

Placement of the subwoofer

Human ears are not sensitive to the directionality of bass, so it can be placed in the corner.

Precautions:

1. The subwoofer must not be placed on objects that are easy to form resonance, such as a very light computer desk. Once this is done, when the subwoofer is working, the table will also vibrate, which has a great impact on the sound quality;

2. The rear of the subwoofer must not be tightly attached to the wall. This is because many subwoofers are rear-inverted designs. And the inverted hole is facing backward, if there is no certain distance, the bass will not be played.

Placement of home theater audio satellite boxes

For the front speaker of the home theater audio satellite box, it is best to form an angle of 45 degrees to 60 degrees with the ear, and the distance between the left and right speakers is determined by the position of the listener and the distance between the listener and the monitor. Generally speaking, the front speakers can be placed parallel to the listener at the same height as possible.

Home theater audio center speaker placement

There is only one principle for the center speaker, and the placement must be directly in front, that is, the vertical bisector of the left and right speakers. Although the distance between the front and back does not matter, it should be as moderate as possible. As for the surround speakers, they should be placed face to face with the front speakers or placed at a 60-degree angle to the human ear, and it is best to hang them at the back and 60cm-90cm above the head. When you choose a speaker, you must pay attention to the quality of the low frequency, the human voice in the middle frequency, the flexibility of the high frequency, the high volume and the image of the sound field, and you must pay attention to your personal preferences and consider the cost of the audio system. Allow yourself to build a suitable, high-quality home theater sound system at the right price, economically and practically!