本题目来源于试卷: gc textbook chapter 12 Sound，类别为 通用国际物理
[问答题]
The “alpenhorn” (Figngw81 bu0r/mp . 12–3z -(x-jlzn(z -pf;anh8) was once used to send signals from one Alpine village to another. Since lower frequency sounds are less susceptible to intensity loss, long horns were used to create deep sounds. When played as a musical instrument, the alpenhorn must be blown in such a way that only one of the overtones is resonating. The most popular alpenhorn is about jz-n pz h ;((zfxn-l-a3.4 m long, and it is called the F sharp (or G flat) horn. What is the fundamental frequency of this horn, and which overtone is close to F sharp? (See Table 12–3.) Model as an open tube.
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