Introduction to Acoustics (Part 1)

Introduction to Acoustics (Part 1)

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Week 1: Vibration & Waves

  • How are time and space related? What about the relation between frequency and wavelength?
  • Does the characteristic impedance of medium determine reflection and transmission?
  • Do we well see the waves of a string in terms of driving point impedance?


Week 2: Acoustics Wave Equation and Its Basic Physical Measures

(1D acoustic wave equation, Acoustic Intensity and Energy, Units of Sound)

  • What are the relations of acoustic pressure, density, and particle velocity?
  • How do they make acoustic wave equation?
  • Is acoustic wave well analogous with one dimension string wave?


Week 3: Acoustics Wave Equation and Its Basic Physical Measures

(Acoustic Intensity and Energy, Solutions of the Wave equation, Demonstration: hearing system)

  • What about the relation between acoustic intensity and energy?
  • How does human hearing system measure sound and its characteristics?
  • Let us experience the change of sound in level and frequency!


Week 4: Waves on a Flat Surface of Discontinuity

(Normal incidence on a Flat Surface, The Mass Law)

  • How mathematically express the boundary conditions at discontinuity?
  • How does impedance at discontinuity determine reflection and transmission?
  • When can we use mass law?


 Week 5: Waves on a Flat Surface of Discontinuity

(Transmission Loss, Snell’s Law, Transmission and Reflection of an Infinite Plate/Finite Structure)

  • How different is the transmission loss of a flexible partition compared to the mass law?
  • Does the obliqueness of wave play a critical role to determine transmitted and reflected wave?
  • What are the roles of partition and fluid loading impedance to transmission loss?




  • Yang-Hann Kim - Mechanical Engineering


The Korea Advanced Institute of Science and Technology (KAIST) was established in 1971 by the Korean government as the nation’s first research-intensive graduate school for science, engineering and technology. It has now grown into one of the world’s best universities, delivering top notch education and research programs for undergraduate and graduate students. KAIST encourages interdisciplinary and convergent research across a wide spectrum of disciplines, as well as strong collaborations with industry and global institutions.


Coursera是一家数字公司,提供由位于加利福尼亚州山景城的计算机教师Andrew Ng和达芙妮科勒斯坦福大学创建的大型开放式在线课程。

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