2005.5.21/saturday/The white noise. 김병근

[현중]

The white noise.
1. What is the white noise?
This is a signal that has a regular frequency spectra within the range of a large frequency. That is this noise that has a continuous spectra.



This sound doesn't interrupt work efficiency, because it gets used to be heard easily. It also covers an offensive noise.
2. Which examples of white noise are there in around us?
We can contact with these easily. For example, (쉬~) sound in television. and (웅~) sound in a vacuum cleaner are white noise. And the sounds of the waves, the rain the waterfall contain this.
3. What is the white noise used for?
First, it is used for masking signals that you don't want at the sound engineering.(Do you understand masking? Masking. we can say so masking effect. There are two signals. But you don't want first signal. How can you do remove it? You can remove this sound as using white noise. When this sound and white noise meet, frist sound disappears.) This principle is the masking or masking effect.
It is used for covering around noise in the office. It has also been used by help sound for comfortable sleep since early times.
4. How does the white noise influence in a human body?
There are two opposing opinions about the white noise affect in a human body.
First opinion, it improves concentrating and memory capability. And it also makes comfortable feeling of you after it puts at ease you.
Second opinion, when infants hear it, it can press growth of their brain.
First opinion is predominant among the academic. And we can find thesises what first opinion prove easily. But, after the thesis which white noise can press a two-year old body's brain was published in the science academic journal, there has been a sharp conflict to opinion on the white noise. (This thesis was resulted by experiments using mice.) But thesises related with it doesn't publish any more in the academic.
5. A foreign example and the domestic related with white noise.
The white noise has been researched as various uses. And it has been put into practical use in various parts.
In american case, They enact 'oral privacy law'. And they're enforcing the law using a product used white noise. And every government has to use for keeping a oral privacy. It is used in order to prevent privacy of customers and improves their business ability in banks, And concentration in the library. Also puts patients at ease in the hospital.
In the domestic case. Studying of white noise have been doing in universities. Foriegn products of white noise is adapted for IBS(intelligent building system). It is also being studied for help sleep products and noise cover.