Musicians, audiologists, and audio engineers use their knowledge of sound and sound waves on a regular basis. However, acoustics plays a role in several other careers that are less obvious. Architects and municipal planners use acoustics when designing buildings or deciding the best uses for plots of land. They consider how noise from one room or one building may carry to other spaces. Seismologists apply acoustical knowledge when studying shifts in the Earth or consulting with mining or drilling companies that need to map out their projects. You even find acoustics at work in a doctor’s office when technicians use ultrasound to examine patients’ bodies.