在不同量測時間或撞擊點下探討不同穿線方式與磅數對羽球撞擊球拍線聲音基頻之影響

Effects of the Sound Base Frequency from Badminton Hitting Racket on Different String Ways and Thread Pounds with Different Time Points or Impact Points

陳冠廷(Guan-Ting Chen)

指導教授 ： 劉于詮

長榮大學/管理學院/運動競技學系(所)/碩士(2017年)

摘要

本研究嘗試在不同量測時間或撞擊點下，探討不同穿線方式與磅數對羽球撞擊球拍線聲音基頻之影響。實驗以Audacity 聲音編輯軟體針對羽球撞擊球拍線的聲音基頻進行分析，自變項為不同線材穿線方式（單一線材與子母線材）、三種穿線磅數（20磅、24磅、28磅）、不同時間點（穿完線當下和穿完線後1、3、5、7、15、24、48、72、96、120與168小時）、不同撞擊點（中心點、3、6、9、12點鐘位置），統計則以獨立樣本三因子變異數分析進行。結果顯示：一、不同穿線方式、穿線磅數、撞擊點與量測時間點個別和彼此間，對穿線完成當下聲音基頻、聲音基頻自然衰退和試打過程中聲音基頻衰退均產生影響。二、對穿線完成當下聲音基頻影響方面，穿線磅數與撞擊點相同，子母線材聲音基頻會大於單一線材；穿線方式與撞擊點相同，當穿線磅數增加，聲音基頻也隨之增加；穿線方式與穿線磅數相同，都是以球拍中心點聲音基頻最大，其他四個撞擊點的差異並不大。三、對聲音基頻自然衰退影響方面，穿線磅數與量測時間點相同，子母線材聲音基頻大於單一線材；穿線方式與量測時間點相同，當穿線磅數增加，聲音基頻也隨之增加；穿線方式與穿線磅數相同，都是以第0小時（穿線剛完成）聲音基頻最大，隨著量測進行，聲音基頻呈現自然衰退現象。四、對試打過程聲音基頻衰退影響方面，穿線磅數與量測時間點相同，子母線材聲音基頻大於單一線材；穿線方式與量測時間點相同，當穿線磅數增加，聲音基頻隨之增加；若穿線方式與穿線磅數相同，都以第一場試打（穿線後第1小時）聲音基頻最大，隨著試打進行，聲音基頻有隨之下降趨勢。五、子母線材聲音基頻自然衰退曲線變化和單一線材不同，在第48小時後，單一線材衰退已趨緩；但子母線材在第120小時實驗結束時仍持續衰退。至於試打後聲音基頻變化，在穿線完成48小時內進行試打，球線聲音基頻會產生回升和衰退的起伏，剛試打完會下降，靜置一段時間又回升；在穿線完成48小時後，試打對基頻回升效果已不大，且在試打後馬上量測，各測量時間點基頻也都維持在一相同的低點。

關鍵字

子母線材 ； 穿線方式 ； 自然衰退

並列摘要

In this study, the effects of different string ways and thread pounds on the sound base frequency (SBF) when badminton sphere hitting racket string at different measuring times or impact points were tried to explore. Audacity audio software was used to analyze the SBF when badminton spheres hitting racket strings in experiment. Independent variable included different string ways (mono and hybrid string), three kinds of thread pounds (20, 24 and 28 pounds), different measuring times (the moment of threading finished, 1,3,5,7,15,24,48,72,96,120 and 168 hours after threading finished) and different impact points on racket (center, 3,6,9 and 12 o’clock point). Statistics was completed by Independent 3-way ANOVA statistical analyses. Results showed: 1. Different string ways, thread pounds, impact points and measuring times would influence SBF at the moment of threading finished, nature declination of SBF and declination of SBF when swing tests were ongoing individually and mutually. 2. For the SBF at the moment of threading finished, SBF of hybrid string was bigger than mono string when thread pounds and impact points were all identical, SBF would rise with the increasing of thread pounds when string ways and impact points were all identical, racket center’s SBF was maximum and the disparity of other four impact points’ SBF was indistinct when string ways and thread pounds were all identical. 3. For the nature declination of SBF, SBF of hybrid string was bigger than mono string when thread pounds and measuring times were all identical, SBF would rise with the increasing of thread pounds when string ways and measuring times were all identical, SBF was maximum at the moment of threading finished and then declining naturally by the proceeding of measuring when string ways and thread pounds were all identical. 4. For the declination of SBF when swing tests were ongoing, SBF of hybrid string was bigger than mono string when thread pounds and measuring times were all identical, SBF would rise with the increase of thread pounds when string ways and measuring times were all identical, SBF was maximum at the moment of 1 hour after threading finished and then declining by the proceeding of swing tests when string ways and thread pounds were all identical. 5. Nature declination curve of hybrid string’s SBF unlike mono string’s curve, mono string’s curve was to go down after threading finished for 48 hours; meanwhile, hybrid string’s curve was still declining even at the end of experiment (when threading finished for 120 hours). As for the changing of SBF after swing test, if swing test was carried out within 48 hours after threading finished, SBF would rise and down, when swing test just finished, SBF decreasing, when swing test finished for a period of time, SBF increasing again. After threading finished for 48 hours, the effect of swing test to let SBF rise again wasn’t obvious; moreover, values of SBF measured just after swing test at different measuring times were all on a similar low point.

並列關鍵字

hybrid string ； string ways ； nature declination

參考文獻

石世濱、相子元（1997）。網線材質張力及拍面大小對網球拍彈性恢復系數之影響。體育學報，23，189-200。

林信良、陳五洲（1999）。不同穿線磅數的羽球網線其彈性恢復係數之探討。國立體育學院論叢，44，103-107。

邱憲祥（2007）。新修訂羽球規則對羽球運動的影響分析。中華體育季刊，21（1），115-121。

相子元（1998）。有線元素法於運動器材之應用。體育學報，26，129-136。

許太彥、胡瑞文、洪文彥（2014）。不同線徑、穿線磅數羽球線恢復係數與使用者滿意度之研究。體育學報，47（4），517-530。