音訊處理對聲音品質參數的影響

Improvement of Sound Quality by Audio Signal Processing

黃弘昕(Hong-Xin Huang)

指導教授 ： 劉興華

國立臺北科技大學/機電學院/車輛工程系所/碩士(2009年)

https://doi.org/10.6841/NTUT.2009.00166

摘要

近年來電子產品發展迅速，一般大眾對喇叭的聲音品質要求日益升高。故本文利用MATLAB軟體裡的filterbuilder工具設計符合ISO定義的 1/3 Octave頻帶之帶通濾波器，將MP3音樂檔進行音訊處理後由喇叭播放，客觀的利用信號擷取系統量測並分析聲音品質參數之變化，最後再由陪審團主觀評估改變程度。探討音訊處理前後的聲音品質參數之變化，主要目的是利用音訊處理來提升現有設備的聲音品質。

關鍵字

音訊處理 ； 聲音品質 ； 濾波器

並列摘要

In recent years, the rapid development of electronic products has to meet the demand for better sound quality of the loudspeakers. This research builds bandpass filters according to ISO 1/3 Octave frequency bandwidth with MATLAB. The MP3 music files were played after audio processing with the bandpass filters. Sound quality parameters are measured and analyzed objectively by Pulse system. Also the sound quality is judged subjectively by the jury. The purpose to investigate the effect of audio processing on the sound quality is to enhance the quality of an existing system.

並列關鍵字

audio processing ； sound quality ； filter

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