Regression models and life tables (with discussion
Regression models and life tables (with discussion
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DOI：
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发表时间：
1972
期刊：
影响因子：
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通讯作者：
D. Cox
中科院分区：
文献类型：
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作者：
D. Cox
所公开的鼓槌可由打击乐器演奏者调节重量和/或平衡和/或头部特征，以便改变槌的“感觉”，并且因此也改变当在壶鼓、响弦鼓和其它打击乐器上演奏时可获得的音调效果;并且通常，槌具有可滑动的、可拆卸的和可更换的外部平衡质量装置，其可定位成用作槌的打击头，由此可以容易地获得关于平衡、总重量、头部特征和音调产生的调节。在一些形式中，所述质量装置通常用作可移除和可更换的打击头;而在其他形式中，质量装置包括一个或多个细长的管，该细长的管具有在细长的槌主体上的摩擦夹紧配合，以便在其上手动滑动，但足够紧以避免在正常的演奏动作下移位;并且这种管状构件可以滑动到槌的头端以用作打击头，或者它可以滑动到用作手柄的位置;并且一个或多个这种管状构件可以沿着槌的长度沿着放置在各个位置。锤体还可以在头端具有锥形元件，以确保尤其是头部扩大类型的质量构件的保持;并且本公开还包括这样的头部，其包括相对硬的内部部分和相对软的外部覆盖物。
The drum mallets disclosed are adjustable, by the percussion player, as to weight and/or balance and/or head characteristics, so as to vary the "feel" of the mallet, and thus also the tonal effect obtainable when playing upon kettle-drums, snare-drums, and other percussion instruments; and, typically, the mallet has frictionally slidable, removable and replaceable, external balancing mass means, positionable to serve as the striking head of the mallet, whereby the adjustment as to balance, overall weight, head characteristics and tone production may be readily obtained. In some forms, the said mass means regularly serves as a removable and replaceable striking head; while in other forms, the mass means comprises one or more thin elongated tubes having a frictionally-gripping fit on an elongated mallet body, so as to be manually slidable thereon but tight enough to avoid dislodgment under normal playing action; and such a tubular member may be slidable to the head-end of the mallet to serve as a striking head or it may be slidable to a position to serve as a hand grip; and one or more such tubular members may be placed in various positions along the length of the mallet. The mallet body may also have a tapered element at the head-end to assure retention of mass members especially of enlarged-head types; and the disclosure further includes such heads embodying a relatively hard inner portion and a relatively soft outer covering.