Introducing the enclosure of speaker 喇叭音箱介紹

Reflex Enclosure 反射式音箱：
It is the most popular design. When the diaphragm of the speaker generates sound, the sound waves which are reflexed from the rear board will be sent out by the reflex pipes. The size and length of the reflex holes and pipes all affect the extension of low frequency, therefore according to the character of the speaker, we should design proper holes and pipes in order to get the best speed and the extension of low frequency.
為最多的設計方式。當單體振膜發聲時，其聲音打到後板所反彈的聲波，藉由反射導管將反相的聲波傳遞出來。其反射孔的大小與導管的長度皆會影響低頻的延伸，因此必須根據單體的特性，設計出適合的孔徑與導管的長度，以取得最佳的速度感與良好的低頻延伸。
Closed Enclosure 密閉式音箱：
The enclosure is entirely sealed. This design will decrease the operating efficiency even though the low frequent voice is good. Therefore in order to get better control, we must give high power to operate it or the speed of the low frequency will be delayed.
其音箱完全採密閉式，雖然能獲得不錯的低頻音色 設計方式會大大降低喇叭的效率，若要獲得良好的控制力，就必須採用超大功率來推用，否則其低頻的速度感會有遲頓的現象。
Passive Radiator Enclosure 背輻式音箱：
A kind of closed enclosure, mainly adds another low frequent speaker. When it vibrates to generate sound, the passive radiator diaphragm is pushed by air. The disadvantage is low efficiency and speed.
屬於密閉式音箱，主要多增加一支只有振膜的單體(低音單體，當低音振動發聲時，其藉由空氣來推動背輻式振膜的延伸。但有效率低及速度慢的缺點。
Isobaric Type Enclosure 等壓式音箱：
It is able to increase the low frequent energy, but the closed design causes the low efficiency. When the two speakers work at the same time, if the sound is out of phase, it affects the results as well.
能增加低頻的能量，但密閉式的設計會造成效率較低,兩支單體同時發聲時，若聲音有不同步的問題產生，也會影響喇叭的暫態反應。
Transmission Line Enclosure 傳輸式音箱：
The transmission line enclosure extends the low frequency by a long wave guide; however the over-length of the wave guide may lower the speed of the low frequency.
藉由較長的傳輸管道來增加低頻的延伸，但過長的管道會導致低頻速度慢。

The structure of specialized enclosure 專業用音箱結構：
Reflex Enclosure 反射式音箱：
The design principle is the same as household reflex enclosure.
其設計原理同家用的反射式音箱。
Horn type Enclosure 號角式音箱：
Because of the good diffusivity characteristic of the horn type enclosure, the low-pitched sound is extruded first then sent by the horn to the far place. At the outdoor concert, it is difficult to send the normal low frequency, therefore, we need to use the horn type enclosure to extrude the low frequency and send it. The disadvantage is the worse low frequency extend.
利用號角擴散性佳的特色，先將低音予以擠壓，再經由號角的擺盪，能將聲音傳送較遠處。在戶外大型的演唱會上，一般的低頻並無法傳送較遠處，因此必須藉由號角的擠壓將低頻傳送出去低音。 缺點為低頻延伸較差。
The enclosures we introduced above can not be completely applied in all the electronic products, it is for consultation; we need to face and solve more problems in reality.但是,以上介紹卻無法完全應用在現在電子產品上,只能參考與活用,原因已經在上述說明,且小speaker參數必須用實際搭配來試,現實問題較多.