Monday, February 7, 2011

【 Weak current College 】 [fifteen] room also has a fever music (4), [sixteenth article] B&W CDM-NT multichannel surround sound system, [17 pages] family listening environment fourth-Power By 【 China power house network 】


[14th article] all kinds of pretty one acoustic measures

Want your own listening devices on some level, in the pursuit of ease, enthusiasts common psychology and behavior. To enable listening device has a high scale, as long as there is strong economic strength is not hard, expert guidance on buying advanced equipment together properly, then the expert help on room acoustics do comply with the requirements of meticulous handling and equipment for the correct purpose even sets, was achieved. But this case for the vast majority of people, like the Arabian nights. It is precisely because of the vast majority of people do not have the economic strength, and not just their own device sound so the s.g. pretty sound sustenance to spend money not many peripherals use and other relevant measures. So often what beautiful acoustic measures?

1, equipment of reasonable matching. Sophisticated equipment is necessary for the reasonable arrangement, but how to mix is reasonable but difficult to set type. In General, equipment arrangement except power, impedance and other related specifications to match, the factors to be considered in two main areas, one is the grade is equivalent, the second is at or close to listen to favorite sound timbre. As a result of listening to have different preferences and needs, there is a different mix of ideas. For example, favourite emphasized the some features could be "strong with", like a neutral or as some equipment effacement of individuality, the need for "complementary mix". Regardless of the sources, amplifier, speakers, wire, there is cold, warm, fast, slow, soft, hard, with different characteristics, it is not improper to your personal wishes, also belies pay money. However despite the equipment's characteristics and listen ' requirements vary, but the "pretty" is listening to the common pursuit of subjective, objective audio quality is good, there is a difference is to be recognized by the basic standards. A set of equipment to achieve high bright, baritone, bass, thick and full bodied, and be able to demonstrate the commonly referred to as precise positioning, dynamic sound field broad, aggressive, tone and a sense of purity, air quality, flexibility, and so on, is not a rational collocation alone can achieve, the premise must be that every single piece of equipment has a very high quality. Therefore, we in this match up pretty reasonable, not the reality of luxury "best", but in certain conditions aimed at "good" as possible. Numerous experts, hi-fi enthusiasts of experimental proof, equal pay, equipment room matching is reasonable and appropriate, the results are quite different.

2, on the listening room acoustics. On listening room acoustics do comply with the requirements of processing for playback effect is extremely important, but this is the most complex and most in need of professional knowledge, and is probably the largest investment. Room on the sound effects of influence factors mainly in three areas, one is the room size and proportion; second lwh is room settings, such as doors, Windows, size, location, room wall six sides (or more surface) the use of materials, such materials (including furnishings) sound reflection or absorption of characteristics and indicators values (such as by the sound absorption coefficient in a reverberation time of the decision). As a general family, since it is not possible for listening devices tailor-made one in space and structure are very standard room, but only the equipment adapted to existing room conditions, so only, decoration and accessories on, including partition or minimize outdoor noise; use of wood, wall cloth, carpets, curtains and many sound absorption materials; removal or adjustment easy to cause resonance lead to inferior sound indoor debris; avoid formation of standing wave of too many symmetric or concave cavity structure, etc.

3, equipment for proper adjustment. To obtain a good listen effect, not to buy a set of quality excellent, with reasonable facilities to boil, which would also need to be careful calibration equipment. To adjust the equipment of generalized that should include all peripheral equipment to use and pretty acoustic measures adopted, but often refers to two aspects, one is the device with the correct connection between, on the various technical parameters are correct, appropriate adjustments; and then is the proper set-up of equipment (such as speakers and back wall distance, on the side wall of remembrance of high and low, and the angle between the formation of the listener, listen and location set, etc.), and the other for the pretty sound settings, the adjustment carried out. Due to the different listening room, equipment of "energy" and the characteristics of different, speakers, and other equipment set-up and related aspects of the real situation can only be based on the calibration, testing standards not only from an objective point of view of science and theory, more or listen to subjective listening experience. To achieve the best pretty sound State, often need to make the test multiple times.

4. equipment to avoid vibration. Equipment in the horizontal display, the more stable the premise, the more beneficial to the pretty sound. High-end equipment generally have enough "weight", not only is the use of materials caused by foot, but also to a firm (or objectively sound effects). Very sophisticated equipment and even audio frames are used "heavy metal" (good quality) and has very high anti-vibration measures. Tens-CD turntable from important for more than a few sets of basic level the total weight of the CD player. Best avoid vibration of equipment is the speaker, in addition to strengthening its own weight, you want to use can make sound smooth feet. Feet for metal, rubber and wood. In view of every speaker's four feet to constitute a solid surface, so some advanced speakers of feet can be precisely adjusted, there's a dedicated support base. There's only 3 shaoyou advocate down feet words arranged to natural products constitute a weight equal to the plane (if you do not form an equilateral triangle or triangle in plane distribution is not detrimental to the author in a stable parents tried). Some of the different material shaoyou claims, the feet can base produces a different sound, such as advocates the use of Red sandal wood, Crystal and other material or of two specific material overlays etc, this is clearly beyond the scope of avoiding vibration, extend the role of the feet. Audio source, power amplifier and other equipment also need to avoid vibration, some shaoyou similarly to them on the feet, and to take the weight, fixed, and other ways to avoid vibration. There is a condition for each piece of equipment for the exclusive use of the equipment, make them disconnected, eliminate vibration caused by the influence each other.

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