About this course: 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.
Who is this class for: This course is for graduate students and advanced undergraduates in acoustics, audio engineering, and noise control engineering. Practicing engineers and researchers in audio engineering and noise control, or students in engineering and physics disciplines, who want to gain an understanding sound and vibration concepts, are also welcome.
Created by: Korea Advanced Institute of Science and Technology
Taught by: Yang-Hann Kim, Professor
Mechanical Engineering
| Level | Intermediate |
| Commitment | 3 hours / week |
| Language | English |
| Hardware Req | No additional hardware is required |
| How To Pass | Pass all graded assignments to complete the course. |
| User Ratings |
Syllabus
WEEK 1
Introduction
The description goes here
1 video
Vibration and Waves
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.'
8 videos
- Video: Lecture 1-1 Part 1. String Vibration
- Video: Lecture 1-1 Part 2. One Dimensional Wave Equation
- Video: Lecture 1-2 Part 1. Specific Impedance
- Video: Lecture 1-2 Part 2. The Governing Equation of a String
- Video: Lecture 1-2 Part 3. Driving Point Impedance
- Video: Lecture 1-3 Use of Complex Function
- Video: Week 1 Summary Video
Graded: Quiz for Week 1 (Vibration & Waves)
WEEK 2
Acoustic Wave Equation
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.
8 videos
- Video: Lecture 2-1 Part 1. 1-Dimensional Wave Equation 1
- Video: Lecture 2-1 Part 2. 1-Dimensional Wave Equation 2
- Video: Lecture 2-1 Part 3. 1-Dimensional Wave Equation 3
- Video: Week 2 Summary Video
- Video: Lecture 2-2 Part 1. Acoustic Intensity & Energy 1
- Video: Lecture 2-2 Part 2. Acoustic Intensity & Energy 2
- Video: Lecture 2-2 Part 3. Units of Sound (dB Scale)
Graded: Quiz for Week 2-1 (Wave Equation)
Graded: Quiz for Week 2-2 (Basic Measurement)
WEEK 3
Acoustic Wave Equation and its Basic Physical Measures
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.
8 videos
- Video: Lecture 3-1 Part 1. Acoustic Intensity & Energy 1
- Video: Lecture 3-1 Part 2. Acoustic Intensity & Energy 2
- Video: Lecture 3-1 Part 3. The Units of Sound
- Video: Lecture 3-2 Part 1. Review: Intensity & Units
- Video: Lecture 3-2 Part 2. Listening Demonstration
- Video: Lecture 3-2 Part 3. Solutions of the Wave Equation
- Video: Week 3 Summary Video
Graded: Quiz for Week 3 (Wave Equation & Basic Measures)
WEEK 4
Waves on a Flat Surface of Discontinuity 1
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.
8 videos
- Video: Lecture 4-1 Part 1. Normal Incidence on a Flat Surface of Discontinuity 1
- Video: Lecture 4-1 Part 2. Normal Incidence on a Flat Surface of Discontinuity 2
- Video: Lecture 4-1 Part 3. The Mass Law 1
- Video: Lecture 4-2 Part 1. Review: Normal Incidence on a Flat Surface of Discontinuity
- Video: Lecture 4-2 Part 2. The Mass Law 2
- Video: Lecture 4-2 Part 3. The Mass Law 3 (demonstration)
- Video: Week 4 Summary Video
Graded: Quiz for Week 4 (Waves on a Flat Surface of Discontinuity)
WEEK 5
Waves on a Flat Surface of Discontinuity 2
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.
8 videos
- Video: Lecture 5-1 Part 1. Review: The Mass Law
- Video: Lecture 5-1 Part 2. Transmission Loss at a Partition
- Video: Lecture 5-1 Part 3. Snell's Law 1
- Video: Lecture 5-2 Part 1. Snell's Law 2
- Video: Lecture 5-2 Part 2. Transmission and Reflection of an Infinite Plate
- Video: Lecture 5-2 Part 3. Transmission and Reflection of a Finite Structure
- Video: Week 5 Summary Video
Graded: Final Exam
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Korea Advanced Institute of Science and Technology
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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| Access to course materials | Available |
| Access to graded materials | Available |
| Receive a final grade | Available |
| Earn a shareable Course Certificate | Available |
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