Course syllabus
Akustik
Acoustics
VTAN01, 7,5 credits, A (Second Cycle)
Valid for: 2023/24
Faculty: Faculty of Engineering, LTH
Decided by: PLED V
Date of Decision: 2023-03-21
General Information
Elective for: F4, V4-hb, V5-ko
Language of instruction: The course will be given in English
Aim
The purpose of the course is to provide knowledge about sound
propagation in different media, namely fluids such as air and water
as well as solid media such as structural elements, where different
wave types and their properties are introduced. Examples of
relevant applications are Building Acoustics and Vehicle Acoustics
(e.g. car, boat and aircraft).
Learning outcomes
Knowledge and understanding
For a passing grade the student must
- Be able to describe the physical foundations and equations for
waves in solid materials and wave propagation in infinite elastic
media and structures.
- Be able to explain basic concepts of sound propagation such as
acoustic power, intensity, impedance and mobility.
- Be able to describe different damping mechanisms and methods
for experimental determination of damping, as well as know how to
change the damping properties of a structure.
- Be able to explain interaction between fluid and structure such
as reflection, transmission and sound radiation.
- Be able to name and identify calculation methods such as SEA
and FEM.
Competences and skills
For a passing grade the student must
- Be able to calculate natural frequencies, natural modes and
mode density.
- Be able to calculate wave propagation in fluids and structures
to describe reflection, transmission, impedance and mobility.
- Be able to calculate sound radiation from structures.
- Be able to describe an acoustic problem, carry out
calculations, report these and analyze and discuss the problem and
the solution in a technical report.
Judgement and approach
For a passing grade the student must
Be able to critically evaluate and assess technical solutions,
measurement methods and calculation methods as well as their
applicability through opposition.
Contents
- Wave types and propagation in fluids, solids and
structures.
- Mobility and impedance.
- Transmission, reflection and interaction, between different
materials and geometries.
- Sound radiation from surfaces.
- Damping in solids and structures.
- Structural dynamic response for different types of
excitation.
- Statistical Energy Analysis (SEA).
- Finite element analysis (FEA).
- Sound propagation in volumes.
- In-depth project with application to either Building Acoustics
or Vehicle Acoustics.
Examination details
Grading scale: TH - (U,3,4,5) - (Fail, Three, Four, Five)
Assessment: Passed written theory test, and passed project report and presentation.
The examiner, in consultation with Disability Support Services, may deviate from the regular form of examination in order to provide a permanently disabled student with a form of examination equivalent to that of a student without a disability.
Admission
Admission requirements:
- FMAB30 Calculus in Several Variables
The number of participants is limited to: No
The course overlaps following course/s: VTA016, VTA060, VTAF05
Reading list
- A Nilsson, B Liu: Vibro-Acoustics. Springer, 2016. Freely aviable as E-book for LU students.
Contact and other information
Examinator: Peter Persson, peter.persson@construction.lth.se
Course homepage: http://Canvas