ô ߿Ϲ Ѽ, Ͽ 2 Ϲ DB Ѵ. ߿Ϲ DB ̷ Ϲ ϰ з ̿ θ ۼϰ ij ǥرϰý (RMS) žϿ Ϲ ϵ ϴ ̴. ̹ ù Ǹ ϴ ߿Ϲ Ⱓ ؿ ̻ 1980 ~ 90 Ϲ 15鿡 Ͽ DB(ȭ) ̸ 2019 16 DB ִ. ϷǸ Ϲ ϰ Ӹ ƴ϶ Ϲ Ȯο ҿǴ ð Ǿ û ù 䱸 Ȯϰ żϰ ȴ. , ÿ ֱ ÿ Ϸ Ϲ DB( 93) ϹǸ ȣ Ͽ ߿ Ϲ DB ϰ ϰ ùε鿡 ȹ̴.
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