瀹ゅ垎绯荤粺蹇呭鐭ヨ瘑
瀹ゅ唴鍒嗗竷绯荤粺鏄拡瀵瑰鍐呯敤鎴风兢銆佺敤浜庢敼鍠勫缓绛戠墿鍐呯Щ鍔ㄩ�氫俊鐜鐨勪竴绉嶆垚鍔熺殑鏂规锛?/p>
鏄埄鐢ㄥ鍐呭ぉ绾垮垎甯冪郴缁熷皢绉诲姩鍩虹珯鐨勪俊鍙峰潎鍖�鍒嗗竷鍦ㄥ鍐呮瘡涓钀斤紝
浠庤�屼繚璇佸鍐呭尯鍩熸嫢
鏈夌悊鎯崇殑淇″彿瑕嗙洊銆?
浠庡伐绋嬭搴︾湅瀹ゅ垎鏄敱棣堢嚎閾炬帴鏈夋簮璁惧涓庢棤婧愬櫒浠堕�氳繃澶╅绾挎斁灏勪俊鍙风殑绯荤粺銆?/p>
鏈枃
缂栬�呬粠宸ョ▼瑙掑害鍒嗚В瀹ゅ垎鐨勫悇閮ㄧ粍鎴愬拰鏁呴殰鎺掓煡銆?/p>
1
鏃犳簮鍣ㄤ欢
鏃犳簮鍣ㄤ欢涓昏鍖呮嫭锛氳�﹀悎鍣紝鍔熷垎鍣紝
3db
鐢垫ˉ锛屽悎璺櫒绛夌瓑銆傛棤婧愬櫒浠跺姛鐜囨崯鑰楃畻寮?/p>
涓?/p>
10lg
锛?/p>
n
锛夈�?/p>
1.1
鍔熷垎鍣?/p>
鍔熷垎鍣ㄥ畾涔夛細鍔熺巼绛夊垎鍣ㄤ欢锛屾牴鎹姛鐜囧垎閰嶈鏍煎垎涓轰簩鍔熷垎锛屼笁鍔熷垎鍜屽洓鍔熷垎銆?/p>
鍔熷垎鍣ㄦ妧鏈弬鏁帮細鎹熻�椾负
10lg
锛?/p>
1/n
锛夛紝渚嬪浜屽姛鍒嗘崯鑰椾负
10lg
锛?/p>
1/2
锛?/p>
=-3db
锛屼笁鍔熷垎
鎹熻�椾负
10lg
锛?/p>
1/3
锛?/p>
=-4.8db
锛屽洓鍔熷垎鎹熻�椾负
10lg
锛?/p>
1/4
锛?/p>
=-6db
銆?/p>
鍔熷垎鍣ㄥ簲鐢細涓�鑸簲鐢ㄤ簬澶╃嚎鐐逛綅鍒嗚矾銆?/p>
1.2
鑰﹀悎鍣?/p>