Acoustical engineering 42 Engineering Acoustics Engineering 30 Acoustics 21 Hearing 21 Sound 21 Signal, Image and Speech Processing 14 Physics 13 Dynamics 9 Vibration 9 Vibration, Dynamical Systems, Control 9 Characterization and Evaluation of Materials 8 Materials science 8 Fluid- and Aerodynamics 4 Fluids 4 Industrial safety 4 Oceanography 4 Quality Control, Reliability, Safety and Risk 4 Quality control 4 Reliability 4 Engineering Fluid Dynamics 3 Fluid mechanics 3 Geophysics 3 Music 3 Aerospace Technology and Astronautics 2 Aerospace engineering 2 Astronautics 2 Building Physics, HVAC 2 Building construction 2 Electronic circuits 2