Friday, January 20, 2012

【 Weak current College 】 multimedia listening environment and power mix---Power By 【 China power house network 】


In the old shaoyou spread in such a view: listening to music, one third of the equipment, seven environment. Many of my friends might think that the words were overkill, however, often heard that an Internet user in 10 sqm cabin bought 12-inch subwoofer, ready to use 200 watts of power to enjoy intensively, tearing pants of bass, it cannot help heart hair tightly, inhaled gasped, at this point, to think of the "one third of the equipment in seven environments", deeply embedded learning them.

This secret, to hear beautiful moving relationship, it is necessary to put the person, the box, the relationship between the environment. And this one, the size of the room and the speaker's power match, is our most neglected issues.

On the environment: a little experiment

To understand the environmental impact of multimedia sound, a little experiment.

A first step, the experiment room size on effect of sound, the sound box moved to the toilet in a song Hotel California, listen to the water Curtain Cave-like sound effects. The second step, the experiment room open on effect of sound, the speaker to move to places no empty furniture House on a piece of celery CAI, listen to what is called. The third step, the speaker to move to put a song in the plain area, to hear him Jay thin throat much color. You can also put the speaker to move to the people's Hall, Notre Dame de Paris ...

Of course, is a joke, not moving anywhere, a sound card capable of simulating various environment sound effect, then, with the extreme sound to hear me, for my part, very often, then you can appreciate the taste of the die.

Then, listen to the music room much? follow now room conditions, it might be a 10 square meters, 20 square meters and the lower limit is a limit of 10 square meters, in particular the following 5 square meters, according to the principles of acoustics, users almost impossible to get good bass, a low frequency band extruding, sounds dull, turbid in the chest, the heart beat of the side effects of stimulus. Therefore, for this condition, do not recommend to invest in multimedia speaker, using headphones. 25 square meters, more than 25 square metres in particular, could not support most of the multimedia speakers, their actual power not enough. These sections will be expanded later.

Random House's listening. Things messy often absorbs excess wave reflection, make the room close to the correct reverb index. Similarly, on the walls to hang some tapestry wool products such as are valid through the cudgel furniture decorations let become irregular, also have immediate effect.

The high roof is fortunate to have some, perceived sense of listening to the sound field of three-dimensional sense on and in depth, but unfortunately real estate ' and does not pay attention to these, in order to save costs, community building storey in 2.6 meters, raise your hands almost chuding, wretched so chilling. The solution is to put the roof also become irregular, such as the use of more complex style chandelier (careful), in addition, hanging various strange service drops must be young people live, in pursuit of a given a voice like that, you have the courage to leave their rooms into a Moleskine small gift show?

For a room on a variety of factors influence to listen, as follows:


The best worst condition settlement
15 ~ 20 m 5 m following discard multimedia speaker
Top high 2.8 meters 2.4 m to improve reflection at the top, such as the pendant lamp, ornaments
Irregular rectangular shape, due to the extremely narrow or a corner to adjust the computer location, set the partition
Display slightly confusing large glass or smooth products linked to cotton or wool shop products
Corner empty corner little empty corner lot, and solid cubic pile up incidentals or acoustical materials

Power and the environment: give me true digital

Discussed the size of the room, the next question naturally fell in power, more power to meet the needs of our stupid?

Every day we face merchants "800 Watt, 1000-Watt" bombing, even a small plastic loudspeaker can also play on 180 Watts of labels. This fool's trick was Japan speakers in Chinese sales of invention, and now is people give as "market without borders", "Bacchus". In fact, just a small concept trick – peak power or music power, 800, 1000, digital marking is speaker at the moment to be able to withstand the maximum power, and the speaker of the General relationship between the power output should be 10: 1 to conversion, and may even reach 16: 1.

What is a peak power, look at the lifter will know that they can break out of the hundreds of pounds of heavy lift the barbell, can only support a few seconds. While the speaker even a few seconds are not supported.

In accordance with real power, our room is about how much is enough?, or sentence, to be an experiment, movers to 1900T2 nominal power is 15W * 2, in the course of the nominal power M200 is 20W * 2, 15 square meters room listening to suffice. If enough sound pressure is not enough, then try to buy United States accurately, 2.1 speakers actually achieve 260W, 5.1 speakers 500W is reached. In the General House of the living-room, the ground shakes. At the recent emerging from the new multimedia, dew A100 callout 50W * 2 of output power, but they deal with the 20 square meters or more room or to some degree. In effect, doubling the power, sound pressure only three DB, therefore, the power of 50W * 2 and 20W * 2 power in most cases, the difference between the sound pressure.

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