Benefits: Convenience and practicality, simple connection, less wiring, accurate sound orientation, and natural sound reinforcement.
Error and fallacy: It is easy to induce howling, and the volume of the microphone is not turned on very much.
Broadcast system separate installation: use separate methods to install several ceiling speakers on the ceiling, or install several speakers on the wall, behind the seats, etc. Note that the PA loudspeaker should be selected with sharp directivity, and its distribution scale should be limited. It is better to have a low ceiling when using in-ceiling speakers.
Benefits: Improve the direct sound ratio, the sound pressure distribution is uniform, and it is not easy to stimulate howling.
Error and fallacy: poor sense of sound direction.
Broadcasting system centralized ~ split-type placement: the centralized mode is the main method, and the split-type mode is supplemented. Music, cinema, etc. need to use the centralized playback of sound with accurate sound direction, and the language sound reinforcement is played by separate playback.
Benefit: A combination of centralized and separate benefits.
Error and fallacy: The system is complicated and the cost is high.
Broadcast system line array: Line array speakers are designed for large-scale outdoor performances. Recently, there is a small product suitable for indoor use. It is characterized by sharp directivity, the vertical radiation angle of each speaker is only 10 to 30 degrees, and the angle of the speaker can be adjusted precisely, and the attenuation is as small as 3dB per multiplier. It is suitable for large conference multi-purpose halls with higher requirements.
Precautions for the placement of speakers in the broadcasting system
1. Direct full-range speakers should try to avoid interface reflection.
2. When installing the speakers, the direct sound of the sound should be obtained directly in the listening area. In a general environment, hanging speakers is the way to get direct sound in a room. Adjust the angle of inclination to avoid affecting the high-pitched listening. The position of the loudspeaker's horizontal line should be consistent with the horizontal height of the tweeter axis and the listener's ear.
3. The speaker placement should be symmetrical with the central axis of the room. The requirements of the indoor acoustic environment are that the symmetry of the building must be consistent with the symmetry of the indoor acoustics, and the speakers should be placed in the symmetrical position of the central axis of the room. Only by achieving the consistency of architectural symmetry and acoustic symmetry, can an ideal, harmonious and symmetrical sound field be provided for the interior.
