Fantastic sound field
We're talking about Sound Staging. The sound field is the most fantastic of the five HiFi elements. Imagine sitting in front of an ideal replay system with your eyes closed. By changing the voltage and time of the left and right sound signals and pushing two flat speakers, you can create 3D scenes and images in our minds. We can easily hear the first violin group dancing in front of the left, and the second violin group singing in the left of the center later. The oboe and bassoon of the woodwind group play out loud tones in the middle and back field. The cello and double bass of group music on the right play a peaceful tone, which reflects the atmosphere of the whole movement. The French horn, trombone and trumpet of the brass band are often heard in the back, enthusiastically praising the greatness of the composer. Together with the momentum of the timpani and bass drum, the ceiling of the concert hall and the four pibi are in front of us.
Interesting!!!! All of the above are generated by the weak changes in the sound volume and time of the two groups of sounds received by the brain through hearing. Like our vision, the two eyes can make the planar image into a three-dimensional effect.
Sound field elements
The elements that make up the sound field are as follows: width, depth, height, volume proportion of music elements, stereoscopic sense, spatial sense, air sense, image force, stage sense, transparency, serenity, noise ratio and hierarchy. With the aid of excellent balance, it is possible to create a good sound field, otherwise you will do nothing. When adjusting HiFi sound field, it is more important to find out good software for field recording for testing; If you find some pop music CD with echo and artificial delay effect, it will be tasteless when you appreciate the pure recording.
A good sound field should be deep, broad, high in proportion, and even the listener can feel himself surrounded by music as if he were in the scene. The quality of the sound field is not like the sound of the elements have too many personal likes and dislikes, believe that no one does not like to enjoy the magnificent natural sound field. Acoustic field construction must depend on good sound replay element, a bit not leak to the recording of various frequencies in imperceptible in reforming reduction, including high, intermediate frequency echo (Reverberation), natural Reverberation around all kinds of Musical Instruments, vocals (decay) and air (Bloom). In addition to high analytical equipment to restore the above elements, the bad overall balance is also a good sound field killer; To sixty feet wide, big band of instruments is put in more than ten feet wide space is a very difficult thing, ask when sound too thick, balance is wrong (especially big speakers small room), each instrument volume ratio multiplied our confusion and take up more space, how can have a clear, transparent and distinct sound field? Balance slants thin and there will be another phenomenon, the dimensional feeling of sound field is very enough, instrument location is also very accurate, but there're bare feeling, acoustic field sounds fine instrument volume ratio, Musical Instruments and Musical Instruments is seems to have lost its relay, as is the vacuum of space, each other without air coherent, surrounded by a lost every instrument of nature, pine and breathing air.
Tranquility and noise ratio
If you have a friend who has good analytical capability and quality replay equipment, you will need to check the serenity of the room and the signal-to-noise ratio of the replay system. The reason is simple. How can you appreciate the subtlety of the adagio and feel its moving atmosphere when the Hong Kong orchestra is playing a detailed adagio while other people in the vicinity are whispering to each other? The serenity and noise ratio of CD replay system were obviously better than those of vinyl record, but the air of vinyl record was more natural than that of CD. The full balanced signal transmission and circuit design can also be used to enhance the signal-to-noise ratio. In addition, we should also pay attention to whether the overall power supply of the replay system is complete, including whether the position of voltage, fire line, zero line and ground is correct, whether the screen closure of signal line and power line is sufficient, and whether they are positioned in an electromagnetic interference with each other to generate noise, etc. Friends who play vinyl have a much bigger problem with electromagnetic noise because the pickup signal is so weak that it is much higher than the CD amplification required, making for a lot of noise with a slight difference.
Focus, depth, and hierarchy
The power of focus and stereoscopic impression in the performance of sound field are important to show the influence and shock of over 100 people's chorus. In the absence of frequency or volume ratios for individual instruments, the choir could easily be overshadowed by other instruments or turned into a small, loud-up choir. A good sense of hierarchy should be able to clearly define the before and after position of each instrument in the sound field of the recording and the back part of the accompaniment group. For example, "see" the male and female sopranos singing in front of the stage; the latter point is the high school bass string group; the latter point is the woodwind and brass group; and the last point is the combination of different parts. Of course, the more distinct the hierarchy, the more natural the transition, the more you will feel yourself in the scene, but the sense of hierarchy is also limited, do not go into the magic. At the scene while listening to music, because the site's natural reverberation effect, vocals, and different sense of energy and penetration of the instrument, the sound pickup element fidelity is far inferior to the human ear of a variety of reasons, in different pressure and movement, can make us feel levels become mixed, loud chorus climax of timpani, magnificent and crisp triangle ring is not as if suddenly jumped into the front of the whole acoustic field? We often see some professional writing friends in HiFi magazines. In order to make readers feel more interesting when reading articles about equipment or loudspeaker, they tend to exaggerate words, shape and effect. The addition of a few condiments and embellishments does have a refreshing effect on our appreciation of their articles, and is beyond reproach. However, when we apply or compare things in the real world, we should not be conformist, and should seek the truth of the facts with an objective and materialistic attitude. I remember that one article introducing A d-a Converter described its excellent analytical power and sense of hierarchy. It was pointed out that A chorus of the famous HiFi disc "black church" could hear more people than other devices in A row. There were six groups of people singing and one of them could sing well. This point to the younger brother one self-confidence has reached "Hi - End" realm of friends for big affair capsule, change a lot more "Hi - End" of the equipment, because he has always been a lack of imagination, imagination is needed, because in the real scene chorus the algorithm, we should hear a different group of "voice" in and around singing, rather than to hear how many line stand so close to the people in "alone", or someone to stand out in the parts; People who have a little knowledge of the requirements of the chorus are all knowledgeable. The same and vocal parts, no matter the pitch level or volume, are required to be coordinated as much as possible.
Loudspeaker positioning with room sound absorption
When we listen to the sound field, do not sit on both sides to criticize indiscriminately, must sit on the middle line of two speakers, before and after the appropriate distance can be found to get the best results. The placement of loudspeaker plays a very important role in the construction of sound field. Usually, the distance between them and the back wall and side wall is only a few millimeters, which can make a great difference. To get a good sound field, work on the placement of the speaker. Besides the location of the speaker, the sound absorption of the room cannot be excessive; A lot of "ace" in memory is defeated in person cloud yiyun, the absorption big law that hard USES other people room ability share move to oneself in the home, make the voice becomes rigid and dull, spot feeling and live feeling disappear completely, that has sound field to speak to. But also should notice the room cannot too "be born", too "be born" the room often has too many reflection sound, such also can disturb and destroy good sound field to reproduce. As to the ideal room sound absorption needs, because the structure of individual room, size and the subjective requirement of listener differ, must experience spot music more personally just can make appropriate adjustment.
The bigger the room, the better the sound field?
Experience has taught us not to go overboard in the pursuit of sound field perfection, since our hi-fi room is never really a concert hall. Average room is already very rare to have 20 feet wide, if stubbornly made perfect sixty feet to one hundred feet wide real scene effect, in proportion to the volume of individual instruments and voice quality is bound to make major concessions on fax degree, we can feel the power of big band, sound effects and reduce the enjoy the charm of music. Is the bigger the room, the better the sound and sound field? Problem seems not so simple, because the room is larger, must be used to drive the air enough to produce ideal sound energy is, the greater the speaker unit will, the more the greater the although we can use the B type of transistor amplifier is to go to several kilowatts of cheap high-power output, but if you got the pure class A low distortion sound quality, can endure such as the noise of the PA PA system? Second, such as dynamic distortion, room acoustic processing and other problems are quite a headache. Of course, if you have the ability to solve the above problems, the larger the replay area, the more relaxed the sound will be.