以Simulink軟體模擬混音濾波器電路之頻率響應研究

Abstract

中文摘要

頻率響應其目的在描述電路的頻域特性，我們日常使用的音響產品，如耳機、喇叭和擴大機，都是需要了解有關頻率響應的資訊，頻率響應在應用上可說是極為廣泛。本文運用simulink軟體結合MATLAB，模擬常見濾波器電路之頻率響應，如帶通濾波器(band-pass filter)、低通濾波器(low-pass filter)、高通濾波器(high-pass fliter)與帶拒濾波器(band-reject band)，目的為研究各濾波器電路連接方式與音訊下呈現之波形狀態與分析。 我們可以在simulink軟體上清楚模擬呈現，濾波器串聯設計完成前後之波形來比較結果，並將音訊重新匯出後實際聆聽比較頻率特性間的差異。串接濾波器的種類與數值的選擇，依據濾波器理論並結合個人經驗與想法，自由地設計呈現，藉助simulink軟體簡單的進行元件拖拉與計算，輕鬆模擬頻率響應之問題。而若將多個音訊結合，也可運用simulink軟體模擬並比較波形之差異，透過及時的濾波器串接與調整，來達到研究所需之目的。 這項simulink電子元件模擬應用，可以有效協助我們學習電路學，進行音訊研究者也可輕鬆實際進行分析與探討，且simulink軟體模擬應用也不僅限於濾波器頻率分析，還可進行許多模擬研究，例如訊號的選擇、提高功率的傳輸效率等專業應用。

Abstract

The purpose of frequency response is to describe the frequency domain characteristics of the circuit. The audio products we use every day, such as headphones, speakers and amplifiers, aim to know information about the frequency response, which is extremely wide in application. This article uses simulink software combined with MATLAB to simulate the frequency response of common filter circuits, such as band-pass filter, low-pass filter, high-pass filter and band-pass filter. The purpose is to study the connection mode of each filter circuit and the waveform state analysis under the audio signal. We can clearly simulate the display on the simulink software, compare the results before and after the filter series design is completed, and then listen to the differences between the frequency characteristics after re-exporting the audio file. The choice of the type and value of the series connection filter is based on the filter theory and combined with personal experience ideas, and freely design presentation with the help of simulink software to simply drag and calculate the components, and easily simulate the frequency response problem. And if multiple audio signals are combined, simulink software can also be used to simulate and compare the differences in waveforms, and through timely filter series connection and adjustment, to achieve the required purpose of the research. This simulink electronic component simulation application can effectively help us learn circuit science, and audio researchers can also easily perform actual analysis discussion. As a result, the simulink software simulation application is not limited to filter frequency analysis, but can lead to many simulation studies, like signal selection and improving power transmission efficiency fessional applications.