弦樂器中，吉他的演奏在音樂領域佔了很重的份量。想要演奏出動人好聽的樂曲，除了熟練的技巧，更需要一把合適的吉他。演奏吉他時，會使用撥片(Picks)來代替手指彈奏，而不同種類的 Picks，對於吉他聲音的泛音強度也不同。本研究利用全因子實驗設計法，探討 Picks 對於吉他的聲音特性分析，改變 Picks 的幾何條件。選擇 Picks 的厚度、角度、材質，作為全因子實驗設計法的變因，目的為創造高泛音強度的 Picks。
發現使用單音撥弦Picks 的控制因子對第一弦泛音強度的影響力為：Picks厚度> Picks材質。對第二弦泛音強度的影響力依序為：Picks角度> Picks厚度。對第三弦泛音強度的影響力依序為：Picks厚度> Picks材質。對第四弦泛音強度的影響力依序為：Picks厚度> Picks材質。對第五弦泛音強度的影響力為：Picks厚度。對第六弦泛音強度的影響力依序為：Picks厚度> Picks角度。
使用連續音撥弦Picks 的控制因子對第一弦泛音強度的影響力為：Picks厚度。對第二弦泛音強度的影響力依序為：Picks厚度> Picks角度。對第三弦泛音強度的影響力依序為：Picks角度> Picks厚度。對第四弦泛音強度的影響力依序為：Picks厚度> Picks角度。對第五弦泛音強度的影響力依序為：Picks厚度> Picks角度。對第六弦泛音強度的影響力依序為：Picks材質> Picks厚度。
統合實驗結果，發現要製造高泛音強度的Picks ，三個因子當中，Picks厚度對泛音強度為影響十分顯著的因子。

In this study, a full factorial experimental design is used to explore the sound characteristics of guitar picks. The factors chosen are pick geometry, thickness, angle, and texture. The goal is to find picks which can higher harmonics.
The effect of factors on single tone of the first string harmonic intensity is as follows: thickness > materials. For the second string, it is angle > thickness. For the third string, it is thickness > materials. For the fourth string, it is thickness > materials. For the fifth string, it is mainly thickness. For the sixth string, it is thickness > angle.
The effect of factors on continuous tone of the first string harmonic intensity is mainly thickness. For the second string, it is thickness > angle. For the third string, it is angle > thickness. For the fourth string, it is thickness > angle. For the fifth string, it is thickness > angle. For the sixth string, it is materials > thickness.
According to the experimental results, the higher harmonics intensity is significantly affected by the thickness of picks.

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