| [摘要] |
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本研究選定6個實際聽堂為對象，以模擬音場的方式建立個音場，並透過耳機重播方式 |
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探討主觀喜好之課題。評估者分為音樂專業者及一般大眾兩組就兩種獨奏樂器所模擬之音 |
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樂分別進行評估。主觀評估過程中，使用強迫選擇之比較法，受測者在每一對的音樂片段 |
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中選擇他們較喜愛者。測驗量是藉由一複雜的過程中產生的，在廳堂為空席時記錄雙耳脈 |
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衝響應，輸入之音訊則是在無響室內所錄製的，每個音源之音壓級都控制為常數80dB。 |
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研究結果發現兩組評估人員對於大提琴演奏時喜歡較長之餘響時間，而木琴演奏時， |
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喜歡之餘響時間較短，音樂專業者比一般大眾能接受的餘響時間範圍較大。影響主觀喜好 |
| 之最重要物理參數為G80，其與主觀喜好之相關性最高，其次為EDT、lACCE及BR(RT)。整體 |
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之主觀喜好可透過脈衝響應之相對音壓級(G80)及早期衰減時間(EDT)的組合得到最佳的解 |
| 釋。根據Beranek的研究，交響樂的最佳餘響時間為2.2秒，比本研究之獨奏樂器最佳餘響 |
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時間1.3秒長了許多，而其最佳相對音壓級則至少比本研究少5dB以上。 |
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本研究為針對單一樂器（單點音源）演奏時之情況，並未討論交響樂樂團（面狀音源 |
| ）演出狀況。故後繼研究可針對此一課題加以探討。 |
|
| [摘要] |
| Investigation were conducted
regarding subjective preference for simulated |
| acoustical environments of 6
auditoria via headphones. A group of professional |
| musicians and a group of general
listeners were asked to evaluate simulated |
| music by each of two solo
instruments. A forced-choice comparison was used |
| as the test procedure where
people picked their preferred sound field over the |
| other for each pair of music
segments. Test stimuli were generated by |
| convolution processes where
binaural impulse responses were recorded in the |
| field and input signals were
recorded in an anechoic room as the Pressure |
| Level were maintained at 80dB. |
| Both type of listeners
preferred a longer reverberation time for the cello |
| music than for the xylophone
music. The expert listeners can accept a wider |
| ranging of reverberation time
than the public listeners. The most important |
| physical parameter for affecting
subjective preference is G80. The overall |
| variance of the preferences can
be well explained by the combination of early |
| level(G80) and early decay
time(EDT) of the impulse responses. |