Last Modified : Thu, 16 Aug 18

- ECE-473: Fundamentals of Engineering Acoustics UIUC; Allen website; ECE-473; UIUC 2018 Academic Calendar; First day video
- Website Fall ; Daily schedule; Lectures; Homeworks; jontalle@engr amo

*Professor: Jont B. Allen jontalle [snail] illinois [period] edu; TA: Andres Coila acoila [snail] illinois [period] edu - Time: 2-2:50 MWF; Location: TBD
- Textbook:
**Fundamentals of Acoustics,**Kinsler, Frey, Coppens and Sanders, 4d edition; Course description; About the final; Exam I - Office Hours: TBD; Location: TBD
- This week's schedule

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| W
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| Date
| Lecture and Assignment |

Part I: Oscillations and Wave Equation | ||||

1 | 35 | M | 8/27 | Introduction pdfLecture: Ch-1a: Fundamentals of Vibration: Harmonic oscillator pdfRead: Kinsler et al., Ch. 1Homework: HW1 |

2 | W | 8/29 | Lecture: Ch-1b: Damped Harmonic Oscillator | |

3 | F | 8/31 | Lecture: Ch-1c: Inverse Laplace transform solution to the harmonic oscillatorHW1 dueHomework: HW2 | |

- | 36 | M | 9/3 | Labor Day Holiday -- No class |

4 | W | 9/5 | Lecture: Ch-2a: The Vibrating String d'Alembert's solution to the wave equation pdf pptxRead: Kinsler et al., Ch. 2 | |

5 | F | 9/7 | Lecture: Ch-2b: Properties of the wave equation: speed of sound, wave number, input impedance, etc.Example problems: Standing waves, boundary conditions pptx | |

6 | 37 | M | 9/10 | Lecture: Ch-2c: General considerations: Various coordinate systems pdf |

7 | W | 9/12 | Lecture: Ch-2d: Derivation of the Webster Horn equation: From the beginning | |

8 | F | 9/14 | Lecture: Ch-5.1.1: The Acoustic Wave Equation and Simple Solutions: acoustic parameters, the equation of state pdfExample problem: Condensation in water and air. Read: Kinsler et al., Ch. 5HW2 dueHomework: HW3 | |

9 | 38 | M | 9/17 | Lecture: Ch-5.1.2: The equation of continuity, the Euler's equation, linearized wave equation. |

10 | W | 9/19 | Lecture: Ch-5.1.3: The velocity potential, speed of sound (SOS).Example problems: Sound pressure level (SPL), SOS in gases for isothermal and adiabatic processes. | |

11 | F | 9/21 | Lecture: Ch-5.2.1: The Harmonic Plane Waves: the Helmholtz equation pdfHW3 dueHomework: HW4 | |

12 | 39 | M | 9/24 | Lecture: Ch-5.2.2: The 3D wave equation, the wave number. Energy Density: Kinetic and Potential Acoustic Energy. |

13 | W | 9/26 | Lecture: Ch-5.2.3: The acoustic intensity: Instantaneous and average intensity, I_{SPTA}, etc.Example problem: estimating acoustic parameters in water. | |

14 | F | 9/28 | Lecture: Ch-5.3.1: The acoustic impedance: characteristic and specific. Spherical waves: specific acoustic impedance pdfHW4 dueHomework: HW5 | |

15 | 40 | M | 10/1 | Lecture: Ch-5.3.2: Sound pressure level (SPL), Intensity level (IL), Acoustic Power: decibel scale, references in water and air.Example problems: Familiarizing with decibel scales for SPL and IL. Acoustic parameters in water and air for plane waves. |

Part II: Nonlinear Acoustics and Acoustic Propagation | ||||

16 | W | 10/3 | Lecture: Ch-5.4.1: Nonlinear Acoustics: parameter of nonlinearity (B/A), nonlinear wave equation Chapter 5dRead: Kinsler et al., Ch. 16.1 - 16.3 | |

- | F | 10/5 | No office hours; Optional class: Discuss of Exam; No class due to Exam I: 7-9:30 PM; 3013 ECEB NO CRIB SHEET | |

17 | 41 | M | 10/8 | Lecture: Ch-5.4.2: N-wave formation, shock wave formation, shock distance, Goldberg number.Example problem: estimating shock distance in water. |

18 | W | 10/10 | Lecture: Ch-6.1.1: Reflection and Transmission: Normal incidence, boundary conditions (BCs) pdfExample problem: Energy conservation. Read: Kinsler et al., Ch. 6 | |

19 | F | 10/12 | Lecture: Ch-6.1.2: Standing wave ratio (SWR).Example problems: Rigid and pressure release boundaries, reflection at interfaces within human body. HW5 dueHomework: HW6 | |

20 | 42 | M | 10/15 | Lecture: Ch-6.2.1: Transmission through a layer: BCs, acoustic windows, matching layers pdfExample problem: Effect of walls pptx |

21 | W | 10/17 | Lecture:Ch-6.2.2: Oblique incidence: BCs, Snell's law pptxExample problem: critical angle, intromission angle. | |

22 | F | 10/19 | Lecture: Ch-6.3.1: Reflection at a solid: Longitudinal and shear wave speeds pdfExample problem: critical angles for propagation into solids. HW6 dueHomework: HW7 | |

23 | 43 | M | 10/22 | Lecture: Ch-6.3.2: Thermoclines: Sound speed gradients.Example: Ocean thermoclines pptx Read: Kinsler et al., Ch. 15.4, Image model of room pdf |

24 | W | 10/24 | Lecture: Ch-7.1.1: Radiation and Reception of Acoustic Waves: Simple sources, superposition principle pdfRead: Kinsler et al., Ch. 7Example problem: Intensity, power, strength of a small sources. | |

25 | F | 10/26 | Lecture: Ch-7.1.2: The continuous line source: the far field approximation, the sinc function, the spatial Fourier transform.Example problem: Beam pattern in a continuous line source pptx Typed Paper on Sound outline dueHW7 dueHomework: HW8 | |

26 | 44 | M | 10/29 | Lecture: Ch-7.2.1: Radiation from a plane circular piston: The near field approximations, Rayleigh distance pdfExample: Near field axial pressure pptx |

27 | W | 10/31 | Lecture: Ch-7.2.2: The far field approximations, the jinc function.
| |

28 | F | 11/2 | Lecture: Ch-7.3.1: Beam patterns line source vs plane circular piston: Physical beam width. Radiation impedance pdf. Example problem: Radiation impedance in air and water for a circular piston. HW8 dueHomework: HW9 | |

29 | 45 | M | 11/5 | Lecture: Ch-7.3.2: Fundamental properties of transducers: Directional factor and beam pattern, directivity index (DI), etc.Example problem: Directivity for a circular piston. |

Part III: Linear Arrays, Acoustic Waveguides and Resonators | ||||

30 | W | 11/7 | Lecture: Ch-7.4.1: The line array: the comb function, the far field approximation pdf. Example problem: Radiation impedance in air and water for a circular piston. | |

31 | F | 11/9 | Lecture: Ch-7.4.2: The grating lobes in a line array, Steering an array: pptx | |

32 | 46 | M | 11/12 | Lecture: Ch-9.1: Cavities and Waveguides: The rectangular cavity pdfExample problems: Eigenfrequencies. Read: Kinsler et al., Ch. 9.1 - 9.2, 9.5 |

33 | W | 11/14 | Lecture: Ch-9.2: Waveguide of constant cross section, phase speed, group speed.HW9 dueHomework: HW10 | |

- | F | 11/16 | No office hours; Optional class: Discuss of Exam; No class due to Exam II: 7-9:30 PM; 3013 ECEB NO CRIB SHEET | |

- | 47 | - | - | Thanksgiving Holiday (11/17-11/25) |

34 | 48 | M | 11/26 | Lecture: Ch-10.1.1: Pipes, Resonators, and Filters: Motivation, resonance of pipes, closed pipes pdfRead: Kinsler et al., Ch. 10 |

35 | W | 11/28 | Lecture: Ch-10.1.2: Open-ended pipes, effective length of pipe, quality factor of a resonator.Example problems: Flanged and unflanged open-ended pipes. | |

36 | F | 11/30 | Lecture: Ch-10.1.3: Standing wave patterns, absorption of sound in pipes.Example problem: Standing wave ratio. HW10 dueHomework: HW11 | |

37 | 49 | M | 12/3 | Lecture: Ch-10.2.1: Combined driver-pipe system, Helmholtz resonator: resonance frequency in resonators pdf |

38 | W | 12/5 | Lecture: Ch-10.2.2: Acoustic impedance: resistance, inertance, compliance.Example problems: Quality factor and resonance frequency in Helmholtz resonators. | |

39 | F | 12/7 | Lecture: Ch-10.3: Reflection and transmission in pipes, Acoustic filters: types of filters pdf,
| |

40 | 50 | M | 12/10 | Lecture:Horns: Chapter 14a, Webster Horn equation: pdf |

41 | W | 12/12 | Lecture: Ch-14: Hearing: How the cochlea works: pdfCh-8: Absorption and Attenuation of Sound: complex wave number, acoustic scattering pdf Read: Kinsler et al., Ch. 8.1 - 8.5Typed Paper on Sound Final paper dueHW11 due | |

- | R | 12/13 | Reading Day | |

- | 51 | M | 12/14-19 | [Final exams] |

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