How to improve the effect of multimedia conference system of sounds, sound box placed

In multimedia conference room or home theater, in addition to the indoor acoustic environment has a certain effect on acoustic field, the speaker placement is particularly important. On the premise of good indoor acoustical environment, the more accurate acoustic image positioning, sound more realistic, the more one can show a vivid acoustic image of presence. In the following, we discuss three in turn ahead (left, middle and right speaker placement method, surround sound box, and put the subwoofer speakers.

1. The vocal tract of speaker placement

As far as possible in the front speakers are generally in a location near the center of the screen image. Has the greatest effect in the speakers in the quality of language, in order to ensure accurate positioning dialogue in the middle of the screen and the sound is clear, should use specially designed for track of individual speakers. The central channel speaker mostly adopts horizontal horizontal box body, the optimal placement is at the top of the TV (if it adopts front projection screen placed behind the screen), which should be close to the screen.

2. The left and right channel main speaker placement

The two speakers placed has relationship with the position of the vocal tract of speaker. In order to guarantee the acoustic image of left and right to move, they should be put on both sides of the vocal tract of speaker, and the three speakers to listen to screen the best equal distances from the position of the talker. In general, than in the placement of the speakers should left and right two speakers back some distance, until the sound field can completely together, jointly build a truly unified acoustic image positioning. In addition, the left and right channel speakers/treble in vertical height for its speakers in the axis of the speaker is lower than 0.3 m advisable, otherwise the height of the left, middle and right three speakers vary too much, the acoustic image ahead in the lateral shift will give a person the sense with acoustic image jump. Usually floor speakers can meet above requirement. If the book posture speakers for left and right speakers, should be fixed on the speaker stand them, making it highly meet above requirement.

Distance from left and right channel speaker screens related to the size of the screen. If in a small room with medium and large screen color TV, the left and right channel speakers on both sides can be close to the screen. If the screen is small, can make them a little distance away from the screen in order to obtain a broad stereo field. To sum up, left, middle and right three channel speakers sound directivity over diffusivity, i.e. the three channels of radiation Angle range should be mainly toward the best listening position. So can reduce from the floor, wall and roof of reflections, appropriate to ensure that the acoustic image positioning clarity.

3. The surround channel speaker placement

Put the surround speakers should be seeing and hearing the sound environment (room) and the type of loop speakers. Left around and right surround speakers of the two channels, the diffusivity of sound should be over its orientation, create a rich atmosphere surrounding such advantage. Dipole type speaker placement, to focus on two factors: the resonance and self failure cut. Resonance is the best bit of resistance from the ceiling (or ground) 20% of the interior space. In order to make more smooth frequency response can add a low frequency "trap" the new device (low absorption audio) to eliminate the cause sound reflection from failure.

For direct radiant circle speakers, to consider the layout of a lot. For example: fixed on the wall on both sides, and make them to the rear corner of the room; Fixed on the rear wall, make them outward and upward and open a pour eight toward the wall and ceiling junction; On the floor against the wall on both sides, and up to the wall and the junction of the ceiling, and so on. Still can design many other solutions on the basis of the condition of the room. Home theater surround sound field mainly rely on indoor all the sound face surround speakers sound reflection and refraction to form in the different rooms of indoor acoustics conditions differ in thousands ways, as long as the patience test, compare carefully, we will be able to find the best solution.

4. The subwoofer speakers put

Usually the subwoofer speakers on the corner near the best more than 1 m away from the corner, which can reduce the interference of standing wave. Also can put the subwoofer speakers on the best listen to both sides of the position, keep a proper distance, because the human ear for both sides of the direction of the subwoofer is not too sensitive, so the subwoofer will not interfere with the front three channel original acoustic image positioning.

The following methods can effectively help to find the best placement: subwoofer speakers will subwoofer speakers in the best position of listening to move near the sundry (temporarily), then good its horn line and repeatedly play a music has strong bass effect, and then around the room around listen carefully. Requires ears when listening to stick to the ground, roughly in the position of the subwoofer speakers height. At this point, identify the most stable bass, the most deep and clear point, namely the best placement for the subwoofer speakers