| 31200 Fundamentals of Acoustics and Noise Control |
| Danish title: Grundkursus i akustik og støj |
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Language: English ECTS-creditpoints: 5, External examination.
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Exam schedule:
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F3-A (maj 31 2002), E3-A (dec 15 2001) |
| Recommended semester: 4th -7th semester |
| Scope and form: Lectures, problem solving and one compulsory laboratory exercise. |
| Evaluation: Written exam
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| Examination: 13-scale |
| Previous course: 51001 |
| Prerequisites: 01030 / 01031.10010 |
| No credit points with: 51001 |
| Aim: To introduce the participants to fundamental acoustic concepts and to give the necessary background for more specialised courses in acoustics ranging from acoustic communication and virtual reality to control of noise and vibration. |
| Contents: Fundamental acoustic concepts and measuring units. Human hearing and speech. The acoustics of musical instruments. Measurement and evaluation of sound, A-weighting, time constants and equivalent sound pressure level. Octave and one-third octave band analyses of noise. Addition of uncorrelated sound sources. The use of complex notation. Energy density, sound intensity and sound power. Impedance concepts. Plane and spherical sound waves. Reflection and transmission of sound. Sound radiation from monopole and dipole sources, sound radiation from a piston in a baffle. Normal modes in a rectangular room. The diffuse sound field, the energy balance equation in a room and the reverberation time. Sound absorbing materials. Natural modes and resonances in simple mechanical and acoustic systems. Structure-borne sound, vibration isolation of machinery. Sound insulation of single and double constructions. |
| Remarks: This course is a prerequisite of all other courses on acoustics. |
Contact: Finn Jacobsen, building 352, (+45) 4525 3938, fja@oersted.dtu.dk
Jens Holger Rindel, building 352, (+45) 4525 3934, jhr@oersted.dtu.dk |
| Department: 031 Ørsted DTU |
| Course URL: http://www.oersted.dtu.dk/31200 |
| Keywords: sound, noise abatement, hearing, sound insulation, vibration |
| Updated: 07-05-2001 |
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