[{"data":1,"prerenderedAt":61},["ShallowReactive",2],{"q-106180-arch_construction-63":3},{"question":4,"neighbors":26,"sameNumber":45,"prev":34,"next":37},{"id":5,"classKey":6,"session":7,"year":8,"subject":9,"number":10,"groupStem":11,"ownStem":12,"stem":12,"options":13,"answer":18,"answerKind":20,"answerS":11,"answerNote":11,"images":21,"explanation":22,"withheld":11,"deepChars":23,"freq":24,"indexable":25},"arch-106180-801-0103-063","architect","106180",106,"建築構造與施工",63,null,"三明治構法牆壁之兩側面板材相同時，下列何者在中高頻部分之隔音性能較佳？",{"A":14,"B":15,"C":16,"D":17},"中間層為蜂巢板","中間層為纖維水泥板","中間層為含蛭石多孔水泥板","中間層為 PU 發泡板",[19],"C","single",[],"本題考點：三明治（夾心）構法牆的空氣音隔音原理，兩側面板相同時，比較中間層的質量、剛性與多孔吸音性對中高頻隔音的影響。\n【正解理由】聲音穿透牆體時，隔音量受三個因素左右：一是質量定律，單位面積越重的牆越不容易被聲波推動；二是剛性造成的吻合效應，板材越輕越硬，聲波越容易在某一頻帶與板的彎曲波同步，形成隔音低谷；三是內部阻尼與吸音，多孔構造能把在材料內部傳遞的聲能轉換成熱能消耗掉。兩側面板既然相同，差別就落在中間層。含蛭石多孔水泥板以水泥為膠結材，本身有相當的重量，蛭石膨脹後形成的大量孔隙又提供吸音與阻尼，聲能由一側面板傳往另一側的途中被層層消耗，因此中高頻的隔音表現最好，故選 C。\n【逐項排除】\n(A) 中間層為蜂巢板：不符合題目所問。蜂巢芯由薄壁格室組成，重量輕而剛性高，等於用許多小隔板把兩側面板剛性連在一起，振動沿格壁直接傳到另一側；格室內是空的封閉空腔，沒有多孔吸音材料消耗聲能，中高頻隔音差。蜂巢板的長處在輕量高勁度，屬於結構與輕量化取向，而非隔音取向。\n(B) 中間層為纖維水泥板：不符合題目所問。纖維水泥板緻密剛硬，與兩側面板結合後，整片牆近似一塊更厚的剛性板，吻合效應造成的隔音低谷容易落在中高頻範圍；它又沒有多孔吸音機制，聲能在板內幾乎不被消耗。要改善中高頻，中間層需要的是有重量又能吸收聲能的多孔材，單純增加剛性反而不利。\n(C) 中間層為含蛭石多孔水泥板：符合題目所問。它同時具備水泥基材料的質量與蛭石多孔構造的吸音阻尼，對中高頻聲波的削減在四個選項中最有效。\n(D) 中間層為 PU 發泡板：不符合題目所問。PU 發泡板極輕，硬質發泡多為獨立氣泡，聲波難以進入孔隙，吸音能力有限；輕而有彈性的芯材與兩側面板形成「質量－彈簧－質量」系統，使兩側面板耦合振動，在中高頻範圍容易出現共振而削弱隔音。PU 發泡板的強項是保溫隔熱，不是隔音。\n【記憶點】夾心牆要擋中高頻：中間層「有重量又多孔」最好；「輕又硬」的蜂巢板、發泡板偏保溫或結構用途，隔音反而吃虧。",703,1,true,[27,30,33,36,39,42],{"number":28,"session":7,"stem":29},60,"下列圖示玻璃窗框施作何者正確？填縫材填縫材發泡PE 棒填縫材填縫材發泡PE 棒發泡P…",{"number":31,"session":7,"stem":32},61,"整地工程中，下列各種土質邊坡保持穩定的最大坡度（高：底），何者錯誤？",{"number":34,"session":7,"stem":35},62,"有關 PC 耐力板（polycarbonate plate）（聚碳酸酯板）的敍述，下…",{"number":37,"session":7,"stem":38},64,"木料有多種接合方式，下列何者不屬於工地現場木料的接合方式？",{"number":40,"session":7,"stem":41},65,"下列何種天花構造，較有可能因環境溫濕度關係，導致結露、滴水？",{"number":43,"session":7,"stem":44},66,"有關視覺障礙者引導設施，下列敘述何者錯誤？",[46,49,52,55,58],{"number":10,"session":47,"stem":48},"114180","依據建築基礎構造設計規範，鋼筋混凝土構造物如為筏式基礎，其建築物因基礎載重引致之總沉…",{"number":10,"session":50,"stem":51},"113190","混凝土輸送時應保持品質均勻，避免不當之材料析離或坍度損失，下列何項敘述錯誤？",{"number":10,"session":53,"stem":54},"112190","下圖為 RC 外牆龜裂誘發縫的橫剖面圖，以下敘述何者最不適當：",{"number":10,"session":56,"stem":57},"111180","依據建築物無障礙設施設計規範，有關無障礙汽、機車停車位之尺寸，下列何者錯誤？",{"number":10,"session":59,"stem":60},"110180","關於冷軋型鋼構造的敘述，下列何者錯誤？",1791863212806]