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EAA Schola (Education)

Course Overview

Fundamentals of Machine Acoustics (Grundlagen der Maschinenakustik)

Docent:  Mr. Tobias Melz, Prof Dr.-Ing
Type:  Lecture
Term:  winter semester
Chair:  Research group System Reliability, Adaptive Structures, and Machine Acoustics (SAM)
Institution:  Technical University of Darmstadt (TUDa)
Study Path:  Master Mechanical and Process Engineering (Maschinenbau)
Subject Type:  Elective
Keywords:  Introduction: Motivation, environmental pollution noise, human hearing, harmfulness limits, guidelines, noise assessment (emission and immission limits), noise types. Level calculation: motivation and definition of levels, reference values, level arithmetic, rating levels. Introduction to machine acoustics: vibrations, single-mass oscillator, impedance and admittance, wave equation of the sound field, solution of the wave equation for 1D-, 2D- and 3D-sound fields, types of radiators and laws of propagation (spherical radiator – line radiator – area radiator), reflection and absorption, interference, diffraction, relationship between displacement, vibration velocity, and acceleration. Signal processing: frequency analysis, frequency filter, third octave and octave filters, A-, C- and Z-weighting. Machine Acoustic measurement techniques: transducers, methods of sound power determination: free field method, reverberation field method, reference sound source method, sound intensity method. Fundamental equation of Machine Acoustics and engineering noise control: noise generation in force-excited and velocity-excited machine structures, direct and indirect sound generation, distinction between primary and secondary noise reduction.
Hours per week:  3
Total ECTS credits:  6.0
Examination:  written exam
Language:  German
Entry modified:  2020-12-03 10:57:01