What is the difference between a stereo system and a two-channel system?
A true stereo system has at least two independent channels of audio signals, and the replayed signals have a specific sound pressure level and phase relationship with each other. When the sound source is played through the playback system, it will be a clear reproduction of the original sound source. When you need to reproduce the sense of aural position and the position of instruments on the stage or on the stage, you need to use stereo sound, which is a common requirement in art performance venues. This also means that only monophonic signals that are panned between two channels do not have the necessary stereo phase information and are therefore not true stereo signals; although there may be differences in sound pressure levels between the two channels, the position can be simulated. Differences, but this is only a simulation. If you discuss this point, it may take several pages. Another requirement for a stereo playback system is that the entire listening area must be equally covered by the left and right channels to a substantially uniform sound pressure level. For this reason, in the home stereo system, there is an optimal listening position ("the emperor") between the two speakers, where the sound pressure level difference and the arrival time difference of the left and right channel sounds are small enough to maintain the stereo sound Sound and sound source location. The best listening position is in a fairly small area between the two speakers. When the listener is outside the area, the sound image is lost and only one or the other channel can hear the sound. The best listening position in the living room may not be a problem because the sofa can be set there; but in a larger venue, such as a church or theater auditorium, the best listening position may only include one-third of the auditorium. The other two-thirds of the audience will wonder why they can only hear half of the sources. In addition, the stereo playback system must have the correct absolute phase response from the input to the output on both channels. This means that if the system inputs a signal with a positive pressure waveform, then the system output must also be a positive pressure waveform signal. Therefore, taking the drum as an example, when the drum is tapped so that the microphone has a positive pressure waveform signal, a positive pressure waveform should also be generated in the listening room. If you don't believe this has a huge impact, try reversing the polarity of your Hi-Fi speaker and listening to a source with a strong center sound, such as solo. When the absolute polarity is reversed by mistake, you will not be able to obtain a stable center channel image. It will be far from the center and you can hear two speaker positions. The two-channel system many people misunderstood it as a stereo system because there are two channels, and the "stereo" mixer is connected in front of the system, and the stereo amp and equalizer are used throughout the system. However, what these systems lack is a uniform coverage of the entire listening area, and each channel has very little differences in sound pressure level and phase response differences to the coverage of the listening area. We may be able to call this type of system a partition coverage system. To obtain proper sound coverage in large venues to reproduce stereo images, a sound system must be provided that provides each channel's signal with the ability to evenly cover the entire listening area while maintaining a sense of sound orientation. This system sometimes requires more budget, or because the listening area is too wide to achieve smooth overlapping coverage. If a two-channel system plays a stereo signal and does not provide smooth sound overlap coverage, half of the people in the listening area can only hear half of the audio program content, making the two-channel system a bad thing for music sound reinforcement. s Choice. Most listeners hear with others is a completely different music mix. This is an oversight that is too common in venues for music and entertainment purposes, even in advanced venues that deserve better system design. Considering a two-channel system is equivalent to a stereo system, this is a common misconception among people who have a background in a touring or live sound system. When using a two-channel system to amplify the sound of a monophonic microphone, the seat in the centerline of the room is located exactly between the two channels, and a great change in frequency response and coverage uniformity is also experienced. This is The effects of the acoustic interference and signal cancellation caused by the same signal arriving at the listening position from two channels at different times. This is where the two-channel system needs attention in speech amplification applications. Volvo 60Hz Diesel Generator,Volvo 60Hz Volvo Generator,Volvo 60Hz Power Generator Set,60Hz Diesel Generator Set Shanghai Kosta Electric Co., Ltd. , https://www.ksdpower.com
