date_range Débute le 20 juillet 2015
event_note Se termine le 24 août 2015
list 5 séquences
assignment Niveau : Introductif
chat_bubble_outline Langue : Anglais
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Les infos clés

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timer 15 heures de cours

En résumé

Learn about acoustics and sound fields by using the concept of impedance. We will start with the fundamental concept of one-dimensional cases, understand the essentials, and also cover extended topics.

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Le programme

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?
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Les intervenants

  • Yang-Hann Kim - Mechanical Engineering
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Le concepteur

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.
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La plateforme

Coursera est une entreprise numérique proposant des formation en ligne ouverte à tous fondée par les professeurs d'informatique Andrew Ng et Daphne Koller de l'université Stanford, située à Mountain View, Californie.

Ce qui la différencie le plus des autres plateformes MOOC, c'est qu'elle travaille qu'avec les meilleures universités et organisations mondiales et diffuse leurs contenus sur le web.

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