The acoustics of the bassoon has been the subject of relatively few studies compared with other woodwind instruments. One reason for this may lie in its complicated resonator geometry, which includes irregularly spaced toneholes with chimney heights ranging from 3 to 31 mm. The current article evaluates the effect of the open and closed tonehole lattice (THL) on the acoustic response of the bassoon resonator. It is shown that this response can be divided into three distinct frequency bands that are determined by the open and closed THL: below 500 Hz, 500–2200 Hz, and above 2200 Hz. The first is caused by the stopband of the open THL, where the low frequency effective length of the instrument is determined by the location of the first open tonehole. The second is due to the passband of the open THL, such that the modes are proportional to the total length of the resonator. The third is due to the closed THL, where part of the acoustical power is trapped within the resonator. It is proposed that these three frequency bands impact the radiated spectrum by introducing a formant in the vicinity of 500 Hz and suppressing radiation above 2200 Hz for most first register fingerings.

中文翻译：

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巴松管音孔格：开孔和闭孔与辐射声谱之间的联系

与其他木管乐器相比，巴松管的声学研究的主题相对较少。造成这种情况的一个原因可能在于其复杂的谐振器几何形状，其中包括不规则间隔的音孔，烟囱高度范围为 3 至 31 毫米。当前文章评估了开闭音孔晶格 (THL) 对巴松管谐振器声学响应的影响。结果表明，该响应可以分为三个不同的频带，这些频带由打开和关闭的 THL 决定：低于 500 Hz、500-2200 Hz 和高于 2200 Hz。第一个是由开放 THL 的阻带引起的，其中乐器的低频有效长度由第一个开放音孔的位置决定。第二个是由于开放的 THL 的通带，使得模式与谐振器的总长度成正比。第三是由于封闭的 THL，其中部分声功率被困在谐振器内。建议这三个频带通过在 500 Hz 附近引入共振峰并抑制 2200 Hz 以上的辐射来影响辐射频谱，以用于大多数第一音域指法。