| Type: | Open University
Language: English |
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Previous course: C5101
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No credit points with: C5101
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Prerequisite: 01030/01031.10010
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Recommended semester: 4th - 6th semester
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Scope and form: Lectures and written exercises.
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Examination: Written exam (13-scale)
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Remarks: This course is a prerequisite of all other courses offered by the department.
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Department: Department of Acoustic Technology
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Aim: To introduce the participants to the 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.
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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 and vibration isolation of machinery. Sound insulation of single and double constructions.
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