原文刊于本刊七五年第四期 1.第十九页图二的六幅小图中的水平线上,都漏掉了“主共鸣区”四个字。 2.第二十三页的图六、图七的两个图排颠倒了,图下面的文字说明没颠倒,但缺少标点。正确的排法是:3.第二十六页图八的说明无标点,添补于下：“图8 侧量的重复性。三号琴。 The original article was published in the fourth issue of the Chinese University of Hong Kong in 1975. 1. On the horizontal lines of the six small panels in Figure 2 on page 19, the four words “main resonance area” are omitted. 2. Twenty-third page of Figure VI, Figure VII of the two rows reversed, the figure below the text shows no upside down, but the lack of punctuation. The correct method is: 3. The twenty-sixth page eight of the instructions without punctuation, add in the next: "Figure 8 side of the repeatability.