ͳ ý Ư ľϱ ļ Ư Ѵ. ̸ , 밳 ļ ﰢĸ ýۿ ΰϿ ν ̷. ļ · Ÿµ ϳ ̰ ٸ ϳ ̴. ļ ̿ ü ļ Ư ľϱ ʿ ϴ ü ļ ۾ Ѵ. ϰ ⽺ 밳 ļ ϴ ̴.
ǰ ý ļ µ ־ ̷ ϰ ϰſ ذ ִ ǰ̴. ý ļ impulse ڱؿ ǥȴ. Impulse ϱ Ʊ step ڱ Ͽ. Ʒ Ȳ Ÿ ̴.
ǰ AF(Audio Frequency) ļ ýۿ Ͽ ִ. ð ּ ļ (ش) ð ҿȴ. ̶ ּ 2 ȣ ̷. , 0.1Hz ý ļ Ѵٸ, ǰ 20sec Ŀ ִٴ ̴. ð ļ Ѱ data ϴ. ̿ϸ ļ ð ִ.
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