電磁式平面喇叭設計與實作

Abstract

近年來遠端通訊工業的快速發展，相對的提高新式產品的需求。因為在遠端通訊產品上，例如手幾，對於較小尺寸的配件有較大的需求，所以對平面喇叭的需求也相對的漸漸的提升。 在這篇的論文中，我們將焦點放在建立平面喇叭的系統的模型，並且使用機電聲類比電路去模擬系統的動態響應。而機電聲類比電路則是利用電路的概念。對於機電聲類比電路參數的計算，在這裡我們採用增加質量的方法與曲線逼近的方式來求得。我們利用阻抗量測實驗來求得機電聲類比電路參數。在這裡可以將模擬結果與實驗結果作比較。 電子補償可以用來改善平面喇叭效能的方法。最後，我們將設計平面喇叭並且應用在PDA、手機上。

The telecommunication industry is growing rapidly and promotes the demand of new products. The demand of panel speaker is rising because of its small size which is an important requirement of the telecommunication productions such as mobile phones. In the paper, we focus on constructing the panel speaker model and using the Electro-mechano-acoustic (EMA) analogous circuits to simulate the dynamic response. The panel speaker model includes the mechanical, electrical and acoustical parts. The EMA analogous circuit employs the concept of the circuit diagram to simulate and analyze the model. We adopt the added mass and curve fitting method to calculate the parameters of the EMA analogous circuits. The impedance measurement is employed to obtain the parameters of the EMA analogous circuits. The experiments of performance indices measurement can obtain the system information. We can compare the result of the simulation and experiments. Electrical compensation is employed to improve the performance of panel speaker. Finally, we will design panel loudspeakers for the applications such as mobile phones and PDAs