臺灣博碩士論文加值系統

聲音品質為研究聲音的一門重要課題，其中隱含了人耳對於音樂及噪聲等聲音聽覺感受。對於聲音品質的評估，現今已發展出許多，以響度及頻率為主的各種量測技術，能客觀地表現出聲音的物理品質。本文以心理聲學的響度、尖銳度、粗糙度等參數，從主觀聽覺的層面來量化人耳對聲音的聽覺特性，並衍伸出，符合人耳對音樂聽感的主觀量化數據，分析、建立出一種評估聲音品質的模型。此外，以往對於聽覺粗糙度的計算，並沒有考量人耳聽覺頻帶的特性。因此，本文將臨界頻帶，加入聽覺粗糙度計算中，進而獲得人耳在各種不同頻帶的聽覺粗糙度感受。實驗分析方面，本文以主觀聽測來了解受測群對其音樂的各種聽感及聽覺喜好程度，並透過相關分析及多元迴歸分析，驗證人耳主觀聽感與主觀量化數據之間的對應關係，及評估該受測群對其之聽覺喜好度。分析結果表明，本文所提出的評估模型可用於評估由耳機所錄下來的聲音，表示此聲音品質評估模型，能充分地表達出主觀的音質感受。

Sound quality is an important issue in sound production today, covering a range of fields from music performance, movies, concerts, household music system, and mechanical noise. It is related to human aural response which is subjective to individual’s ear physiology, preferences, and predilection. Many measurement assessment metrics for sound quality have been defined including frequency and loudness that objectively demonstrate the physical quality of sound. Alternately, based on psychoacoustic studies, this thesis presents loudness, sharpness and roughness to quantify subjective auditory characteristics, and then proposes a sound quality evaluation model. The model incorporates subjective quantity hearing data analysis.
In the past, there was no consideration of auditory roughness characteristics of human auditory frequency bands. It is believed auditory roughness has a strong influence on the hearing perception, therefore, the model adds critical-band rate to auditory roughness evaluation. Consequently, the auditory roughness can be clearly illustrated various frequency bands. For experimental analysis, the subjective listening tests were conducted to obtain the hearing satisfaction score and hearing perception preference of individuals for music. The correlation analysis and multiple regression analysis are also used in this work. It may assess the preference of hearing satisfaction score and the relationship between hearing sensation and subjective quantity data. Experimental results verify that the present assessment model can be successfully applied to assess sound quality of audio signals from earphones.

第一章 緒論 1
1.1 研究背景及動機 1
1.2 研究目的及方法 2
1.2.1 研究目的 2
1.2.2 研究方法 4
1.3 文獻探討 10
1.3.1 揚聲器聲音品質的評估方法 10
1.3.2 心理聲學與信號分析 11
1.3.3 音高與音階 13
1.3.3-1 音高理論 13
1.3.3-2 音階 16
1.3.4 合音之探討 17
1.3.5 音色與聲音和諧度 18
1.3.6 多元迴歸分析方法 19
1.4 論文組織 20
第二章 心理聲學的基本理論 27
2.1 離散短時傅立葉轉換 27
2.2 比響度分析 30
2.3 各聽覺頻段指標分析 33
2.4 音質粗糙浮動度分析 34
2.5 整體音調和諧度分析 38
第三章 多元迴歸分析 49
3.1 主觀聽覺量化分析 49
3.2 複回歸分析 54
3.2.1 數據標準化 56
3.2.2 建立迴歸分析模型 57
3.2.3 回歸模型檢定 58
第四章 聲音品質實驗分析 62
4.1 聲音品質評估模型 62
4.1.1 評估模式建立 62
4.1.2 音訊錄製 63
4.1.3主觀聽測實驗 64
4.2 實驗結果與分析 68
4.2.1 主觀聽覺量化分析 69
4.2.2 相關分析 70
4.2.3 迴歸分析 71
4.3 實驗結論 72
第五章 總結 101
5.1 結論 101
5.2 其他發展及應用 104
參考文獻 105

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