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所在平台: Coursera |
课程主页: https://www.coursera.org/learn/intro-to-acoustics
课程评论：没有评论
课程名称：声学导论（第一部分） 课程概述：本课程通过阻抗的概念介绍声学。课程从振动和波动开始，展示如何将振动视为一种波动，涵盖数学和物理层面。课程采用一维示例，提供数学上最简单且足够清晰的物理洞见。第一部分最后将解释在不连续平面上的波动，展示波的传播特性在存在分布阻抗不匹配的空间中如何变化。 课程大纲： 1. **介绍** - 描述：课程的基本信息介绍。 2. **振动与波动** - 描述：本周学习振动和波动的基本概念。通过弦的振动，导出一维波动方程，并通过“阻抗”的概念进行解释。 3. **声波方程** - 描述：本周早期学习解释一维波动方程的三个基本物理量。随后简介声强和能量的基本概念。 4. **声波方程及其基本物理量** - 描述：深入学习声强和能量。了解声音单位或分贝（dB）尺度，并通过各种声音进行听觉体验。最后能够推导波动方程的解。 5. **不连续平面上的波动1** - 描述：学习波在不连续平面相遇时的行为，通过波现象的质量法则进行解释。 6. **不连续平面上的波动2** - 描述：进一步了解在不连续性上的波动。通过斯涅尔定律，分析传输和反射后波的传播情况。 该课程将为您提供声学基础知识，帮助您理解波动的性质和应用。
Name:Introduction
Description:The description goes here
Name:Vibration and Waves
Description:You will going to learn basic concepts of vibration and waves for this week. From the vibration of string, you will be able to derive one dimensional wave equation. Then it will be explained with the concept of 'Impedance.'
Name:Acoustic Wave Equation
Description: Earlier part of this week, you will learn three fundamental physical measures that explain one dimensional wave equation. After that, you will briefly learn about basic concepts of acoustic intensity and energy.
Name:Acoustic Wave Equation and its Basic Physical Measures
Description: On this week, you will learn deeply into acoustic intensity and energy. Then you will get the concept of units of sound, or dB scale with listening to various sound. At the end, you will be able to derive the solutions of the wave equation.
Name:Waves on a Flat Surface of Discontinuity 1
Description: You will now learn when the waves meet on a flat surface of discontinuity. It will be explained with the mass law of wave phenomena.
Name:Waves on a Flat Surface of Discontinuity 2
Description: You will going to learn more about the waves on a discontinuity. With the Snell's Law, you will be able to find out the wave propagation after transmission and reflection on discontinuity.
This course introduces acoustics by using the concept of impedance. The course starts with vibrations and waves, demonstrating how vibration can be envisaged as a kind of wave, mathematically and physically. They are realized by one-dimensional examples, which provide mathematically simplest but clear enough physical insights. Then the part 1 ends with explaining waves on a flat surface of discontinuity, demonstrating how propagation characteristics of waves change in space where there is a distributed impedance mismatch.
