2021.03.22
Acoustics VTAF 01 1.Course info & Intro to Acoustics
NIKOLAS VARDAXIS DIVISION OF ENGINEERING ACOUSTICS, LUND UNIVERSITY Outline
Course Information
Introduction to Acoustics
Summary Instructors
• Lectures ‒ Delphine Bard, [email protected] ‒ Nikolas Vardaxis [email protected] [contact person] à Division of Engineering Acoustics, V-building (5th floor).
• Exercises, laboratories, project ‒ Nikolas Vardaxis
• Guest lectures – … • Administration – Birgitta Rydh, [email protected] – Cecilia Sandstedt, [email protected] My profile
• Nikolaos Georgios Vardaxis – Diploma Architectural Engineering (D.U.Th., GR) – M.Sc. Sound and Vibration (Chalmers, SE) – Ph.D. Engineering Acoustics (LTH, Lund University, SE) – Post-doc researcher in Acoustics >>
– Research: building acoustics, room acoustics, environmental noise, human perception, data analysis.
– Freelance: Studio and room acoustics design, music production, sound design. Course material
• Handed out material – Lecture notes – Exercise tasks – Laboratory instructions (2) – Project task – Formulae
• Website (course material will be uploaded here): – http://www.akustik.lth.se/utbildning/kurser/vtaf01-ljud-i-byggnad-och-samhaelle/ Literature
• Course books – E. Nilsson m.fl. Avd för Teknisk Akustik (2008) » Free PDF on our website » Available at KFS
– Building Acoustics, T.E.Vigran, CRC Press (2008)
– Extra suggestions in the course program. Laboratories & Project task
Laboratories
• Two Lab sessions (in groups of 2-3 students)
1. Recording and analysis of vibration signals 2. Sound insulation measurement
• 2 hours on site
– Preparation and post-processing time needed • Results presented in technical reports
– Either passed or returned for corrections
Project task
– Performed in groups of 2-3 students – Presented Wednesday, December 16th at 15:00-17:00 Examination
The final grade will be obtained as follows…
• Written exam - Online (50%) – Tuesday 31 May at 08:00-13:00 (online). – Theoretical questions and exercises – Calculator and formulae sheet – Graded: u, 3, 4, 5 • Project task (50%) – Graded: u, 3, 4, 5 • Executed laboratories with passed reports The course aims
To understand:
• Principles of sound propagation – physical behaviour
• Effects of sound on humans
• Measurements in acoustics
• Environmental noise problems
• Building acoustics
• Room acoustics V-huset
Lab Refresh maths – Logarithms (I)
• Logarithms: • Definition log x = y b = x • Properties
− Product: log x y =log (x) + log (y)
− Quotient: log x/y = log (x) − log (y)