低音反射式音箱設計分析

Bass Reflect Loudspeaker Cabinets Design and Analysis

朱明輝(Ming Huei Chu) ； 黃正光(Cheng Kuang Huang) ； 劉興華(Shen-Hwa Lue) ； 楊智勝(Chih-Sheng Yang)

《機械技師學刊》 7卷3期 (2014/11) Pp. 8-13

https://doi.org/10.6208/JPME-2014-11-02

摘要

音箱及揚聲器是結合了美學、電學、機械學與聲學的混合領域，不同的揚聲器系統對於音樂的呈現效果有所差異。然而以物理學角度來看，它最主要的特性是將電能轉換為聲能。本研究設計研製一低音反射式揚聲器系統，使用同軸二音路12吋單體Jensen SG-223及樺木夾板製作之音箱組成揚聲器系統。於音箱下方設置矩形低音反射孔，並在反射孔處增加矩形導音管。本研究藉由LEAP模擬軟體探究吸音棉數量及矩形導音管長度對低音反射式音箱中低音頻率響應影響。依據模擬結果設計研製完成揚聲器系統，實際以音樂對揚聲器系統測試具良好效果。

關鍵字

揚聲器 ； 低音反射式音箱 ； 矩形導音管 ； 頻率響應

並列摘要

The loudspeaker systems applied to transfer electric power to sound power, loudspeaker system design needs to combine esthetics, electric mechanic and acoustic techniques for a state of the arts production. The different style loudspeakers have different acoustic characteristics for music reproduction. This research designs the bass reflect loudspeaker cabinets for Jensen SG223 two ways dual concentration units, and applies birch wood to establish cabinets with well designed rectangular bass reflect pipe, and building complete speaker systems. The LEAP speaker system design software is applied to simulate the frequency response for the designed speaker cabinets. The appropriate bass reflect pipe length can be designed by LEAP simulation, and the carbon fiber absorber quantity also can be determined by simulation. The complete bass reflect loudspeaker system with Jensen SG223 two ways dual concentration units has been tested with satisfied music reproduction effect.

並列關鍵字

Loudspeaker ； Bass reflect loudspeaker cabinets ； Rectangular bass reflect pipe ； Frequency response