Course detail
Aeroacoustics
FSI-OAA Acad. year: 2020/2021 Winter semester
Basic description of acoustic waves in gases, decibel scale, levels of acoustic pressure, intensity and power, acoustics spectrum. Human ear and mechanism of hearing. Normalisation and hygienic requirements for noise levels. Noise level produced by boundary layer and high speed jet. Noise level produced by aircraft, noise of jet engine, propeller and supersonic bang. Noise insulations and dumpers, dumpers of vibrations.
Language of instruction
Czech
Number of ECTS credits
4
Supervisor
Department
Learning outcomes of the course unit
Students will gain basic knowledge on noise and its effect on human body and calculation of noise characteristics and noise level.
Prerequisites
Basic knowledge of mathematics, differential and integral calculus, ordinary and partial differential equations. Basics of physics and mechanics, acoustics recomended but not limited condition.
Planned learning activities and teaching methods
The course is taught through lectures explaining the basic principles and theory of the discipline.
Assesment methods and criteria linked to learning outcomes
Participation in lectures is obligatory. Awarding a graded course-unit credit is conditioned by the attendance at lectures, at least 10 of 13. The graded course unit credit is given on the basis of the test of 6 questions.
Aims
Students will gain basic knowledge on noise generation, possibilities of noise measurements and protection against noise.
Specification of controlled education, way of implementation and compensation for absences
If students attend less then 10 of 13 lectures they have to prove they have completed missed lectures.
The study programmes with the given course
Programme M2I-P: Mechanical Engineering, Master's
branch M-LPR: Aeronautical Traffic, compulsory-optional
Programme M2I-P: Mechanical Engineering, Master's
branch M-STL: Aircraft Design, compulsory-optional
Type of course unit
Lecture
26 hours, optionally
Syllabus
Acoustic waves, speed of sound in gases
Decibel scale, levels of acoustic pressure, intensity and power
Possible spectra of sound and their levels, absorption of noise, influence of weather
conditions
Vibration and noise, human ear and mechanism of hearing
Noise regulation requirements
Sources of noise of zero and first order
Aerodynamic noise
Noise of boundary layers
Noise of subsonic jets
Aerodynamic supersonic shock
Noise of aircraft propellers
Insulation against noise
Silencers of noise and vibrations