環繞聲道音箱的擺放
Arrangement of surround channel speakers
環線音箱的擺放應視聽音環境(房間情況)和環線音箱的類型而有所不同.左環繞與右環繞這兩聲道的音箱,其聲音的擴散性應重于方向性,這樣有利營造濃郁的環繞氣氛.偶極型音箱擺放時,要著重考慮兩個因素:諧振和自我衰削.抗諧振的最佳位是離頂棚(或地面)20%的室內空間高度處(如室內高度為2.5m,則最佳位置為上、下50cm處)。為了使頻率響應更平滑可以加一種叫低頻"陷阱"的新裝置(吸收低音頻)來消除導致聲音自衰的反射. 對于直接輻射式環線音箱,可供考慮的布置方案很多.例如:固定在兩側墻壁上,并使它們指向后方墻角;固定在后方墻壁上,使它們向外和向上張開呈倒八字形并朝向邊墻與天花板結合處;放在兩側靠墻的地板上,并向上指向墻壁與天花板的結合處,等等.還可根據房間具體情況設計許多其它方案.家庭影院的環繞聲場主要靠室內各反聲面對環繞音箱的聲反射和折射來形在的,而不同房間的室內聲學條件千差萬別,只要耐心試驗,仔細比較,就一定能找到最佳的擺放方案.
Loop speakers should be placed in different audiovisual environments (room conditions) and types of ring speakers. The sound diffusion of left-surrounded speakers and right-surrounded speakers should be more important than directionality, which is conducive to creating a strong surround atmosphere. When dipole speakers are placed, two factors should be considered: resonance and self-attenuation. The optimum position of vibration is 20% of the height of the indoor space from the ceiling (or ground). (If the indoor height is 2.5m, the optimum position is 50 cm above and below.) In order to make the frequency response smoother, a new device called low frequency "trap" can be added (absorbing low frequency) to eliminate the reflection that causes the sound self-decay. For direct radiation loop speakers, there are many arrangements to be considered. For example, fix them on both sides of the wall and point them to the rear corner; fix them on the back wall so that they are oriented. The surround sound field of home cinema is mainly reflected and refracted by the echoes of the surround sound box in the interior. The indoor acoustic conditions of different rooms are very different. As long as we test patiently and compare carefully, we can find the best arrangement.