| |
| Previous course: C5101 |
| Offered by:
Department of Acoustic Technology
(AT) |
| No credit points with: C5101 |
| Prerequisite: C0130/01030/C0131/01031.C1510/10010/C1521 |
| Recommended semester:
1st - 4th semester |
| Scope and form: Lectures and written exercises. |
| Examination:
Written exam
(13 point scale
) |
| Contact person: |
Jens Holger Rindel, AT, Building 352, Tel. +45 4525 3934
Finn Jacobsen, AT |
|
| Aim: To introduce the participants to the fundamental acoustic concepts and to give the necessary background for more specialised courses in acoustics. |
| Contents: Fundamental acoustic concepts and measuring units. Human hearing and speech. 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 resonance in simple mechanical and acoustical systems. Sound insulation of homogene constructions. |
