【導(dǎo)讀】andhow?Butetothinkofit,namesforalongtime,doagoodjob!

　　

【正文】 . Such as the use of an inclined plane to acoustic reflection. In theory, as long as it is a reflective surface length 畢業(yè)論文外文翻譯 8 greater than the acoustic wavelength, then all wavelengths than a reflective surface with small frequency will be reflected in a certain direction. From the above description, you can understand, in audiophile stereo space, we need to be spread, rather than directional reflection. Because the diffusion can make indoor acoustic more uniform, and the orienting reflex will only on a local reach an influence. Again, what is the two numbers? It is the English quadratic residue. The name es from the formula HN = ( lambda0 / 2n )? Sn, Sn is to n square divided by N remainder. Type0is to spread in excitation wavelength of the center frequency ( such as1000Hz center frequency), n is you decide the diffuser grid number ( or time ). Attention please, step number must be a prime number, such as 7,11,13,19,23,29... Wait. N is0,1,2,3,4,5,6,7, .... HN is n the footfall height. Benefit is the diffusion range is very wide. In fact, tells the readers the two remainder diffusion of simple formula, may help you to understand the sound diffusion, our main purpose is to let you know the origin of the term. In this theory as a basis for many types of the diffuser, which specifically diffusion, diffusion and absorption is two and, more diffusion, absorption and reflection of the three bination. In addition, except for the wall, also used for ceiling. Why the two residue diffuser in recent times wele? Because it has a diffusion properties: if the center frequency is accurate, its diffusion range lower limit can be extended downwardly to the center frequency of about half an octave below ( if the center frequency of 1000Hz, half octave is 750hz ), the cap is very high, can reach the center frequency ( n1) times. Assuming that the center frequency of 1000Hz, the two residue diffuser step7, then spread the upper limit of the range of about6000hz. See here, I think you already know, the general had seen outside the two residue diffuser are almost all aimed at intermediate frequencies above。 and step number (here refers to the step number is a single group number, rather than the two gro up of three groups bined ), diffusion frequency limit is higher also. In addition, why no one will do three, five steps? Because of its relatively low diffusion limit. Nine, greater space than the small space Why big space than small space? The reason is very simple, because of the large space volume is larger, the horn out of the acoustic boundary ( six walls ) degree of distortion is relatively small, you get the sound will be more correct. This is why if we use puter software to do speaker test, usually required in larger space measurement. Because sound less boundary interference distortion, test results will be more accurate. Many people do not know, in fact many speakers puter test software is effective only in 300Hz above all, below the300Hz frequency because the longer wavelengths, is easy to be affected by space boundary interference, so as to cause the test value is not credible. While the anechoic chamber to achieve the goal, is theoretically to pletely eliminate the spatial boundary interference, so that the test results are accurate and credible. In general people39。s home, a large space is the living room and dining room shared open space, a small space is specially designed acoustic chamber or room. In a large space, we need to consider is the spatial multi function sharing, listen music when disturbances, as well as the low frequency horn volume is sufficient wait for a 畢業(yè)論文外文翻譯 9 problem. If the appropriate deployment, you get the sound is usually relatively easy, even with the correct, and low frequency down thinking ability. As for the standing wave, even large space can not be pletely avoided, but the damage will be relatively reduced. In a small space, horn sound by the boundary distortion is severe, the standing wave harm is far greater than the large space, low frequency extension never limited. However, small space because the volume is small, you can not use the power amplifier with large horns, space layout is also more convenient. Ten, much more than anything less good Here does not mean that the equipment more is better, but the sound space. The more the better. However, something more to finish, do not throw, resulting in a room full of dirty. Why the sound space things better? Because these things will be on the absorption and reflection of sound waves generated natural role, achieve the natural regulation of indoor reverberation effect. Remember, the heavier stuff for low frequency or low frequency will have absorption, sometimes can address some of the low frequency standing wave problems. For example, the cabi, sofa, shelf, rack has the function of cd. And the surface of fibrous, porous soft material for high frequency has absorption effect, such as velvet sofa carpet surface, Terry cloth. If the acoustic space within the little things, only a set of sound and a few CD, a sofa, so spring space is easy to generate high frequency echo is too long, too bright, sound insubstantial. Similarly, if the acoustic space in a variety of cabi is fitted with glass door, also can produce too much reflection of high frequency. So the sound in the space it is best not to have glass door cabi. In eleven, the proportion of important acoustic space The socalled acoustic space ratio, generally will be known as the golden ratio. In fact here gold two characters represent rare precious only, with a true golden ratio. Why the acoustic space should pay attention to the long high width ratio? If the percentage correct, can will sound within the space of the standing wave intensity to a minimum, to reduce low frequency st