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2022大学慕课答案 中华茶艺呈现(浙江农林大学) 最新大学MOOC满分章节测试答案
2022大学慕课答案 学术规范与论文写作-1(马力)(湖北大学) 最新大学MOOC满分章节测试答案
2021大学慕课答案 “天使匠心”释义(江苏护理职业学院) 最新大学MOOC满分章节测试答案
2021大学慕课答案 思想道德修养与法律基础(南京交通职业技术学院)1463293546 最新大学MOOC满分章节测试答案
2022大学慕课答案 英语阅读(广西科技师范学院) 最新大学MOOC满分章节测试答案
2022大学慕课答案 数学文化十讲(江苏第二师范学院) 最新大学MOOC满分章节测试答案
2021大学慕课答案 2021秋医学物理实验(王力海)(山东大学) 最新大学MOOC满分章节测试答案
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本课程起止时间为:2021-09-07到2021-12-31
本篇答案更新状态:已完结
【作业】实验五 超声声速的测定 Measurement of ultrasonic velocity 第三次作业
1、 问题:弹吉他时,手指不断的变换位置按住琴弦,并弹奏不同粗细的琴弦来发出不同音调的音乐。请解释并调研吉他的发声机制,并给出相关公式。When playing the guitar, the fingers constantly change their positions, hold down the strings, and play strings of different thicknesses to produce different tones of music. Please explain and investigate the vocal mechanism of guitar and give the relevant formula.
评分规则: 【 一般来说,决定琴弦振动频率的因素有琴弦的粗细形状,琴弦振动部分的长短,琴弦的张力,还有就是琴弦的材质。知道通过手指变换位置来改变弦的长度,进而改变其振动频率,得30分;知道粗细不同的琴弦振动频率不同,因而发出不同的声音,得30分;知道琴弦张力影响频率的,得20分给出琴弦振动类似频率公式得20分Generally speaking, the factors that determine the vibration frequency of a string are the thickness and shape of the string, the length of the vibrating part of the string, the tension of the string, and the material of the string.If you know that the length of the string can be changed by changing the position of the finger, and then the vibration frequency will be changed, 30 points will be obtained;If you know that the strings with different thickness have different vibration frequencies and therefore emit different sounds, 30 points will be obtained;If you know that the string tension affects the frequency, you will get 20 pointsGive the similar frequency formula of string vibration and get 20 points
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