43. Acoustics (for more detailed headings, see Appendix to 43)
43.20.+g General linear acoustics (see also 03.40.K Waves and wave propagation:
general mathematical aspects)
43.25.+y Nonlinear acoustics, macrosonics
43.28.+h Aeroacoustics, atmospheric sound (see also 92.60. Meteorology)
43.30.+m Underwater sound (see also 92.10.V - in physics of oceans)
43.35.+d Ultrasonics, quantum acoustics, and physical effects of sound
43.38.+n Transduction; acoustical devices for the generation and reproduction
of sound
43.40.+s Structural acoustics and vibration
43.50.+y Noise: its effects and control
43.55.+p Architectural acoustics
43.58.+z Acoustical measurements and instrumentation
43.60.+d Acoustic signal processing
43.64.+r Physiological acoustics
43.66.+y Psychological acoustics
43.70.+i Speech production
43.71.+m Speech perception
43.72.+q Speech processing and communication systems
43.75.+a Music and musical instruments
43.80.+p Bioacoustics
43.90.+v Other topics in acoustics