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Sound power and vibration levels for two different piano soundboards

机译:两个不同的钢琴音箱的声音和振动水平

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This paper compares the sound power and vibration levels for two different soundboards for upright pianos. One of them is made of laminated spruce and the other of solid spruce (tone-wood). These differ also in the number of ribs and manufacturing procedure. The methodology used is defined in two major steps: (i) acoustic power due to a unit force is obtained reciprocally by measuring the acceleration response of the piano soundboards when excited by acoustic waves in reverberant field; (ii) impact tests are adopted to measure driving point and spatially-averaged mean-square transfer mobility. The results show that, in the mid-high frequency range, the soundboard made of solid spruce has a greater vibrational and acoustic response than the laminated soundboard. The effect of string tension is also addressed, showing that is only relevant at low frequencies.
机译:本文比较了两种不同钢琴的声音电源和振动水平。其中一个是由层压云杉和另一个固体云杉(色调木材)制成。这些也不同于肋骨和制造程序的数量。所使用的方法在两个主要步骤中定义:(i)通过测量由混响场中的声波激发时钢琴衬底板的加速度响应来获得由于单元力引起的声功率; (ii)采用冲击试验来测量驱动点和空间平均平均平均转移迁移率。结果表明,在中高频范围内,由固体云杉制成的声面具有比层压声板更大的振动和声学响应。还寻址串张力的效果,显示在低频下只相关。

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