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Acoustics is the science that studies sound, in particular its production, transmission, and effects. Sound can often be
considered as something pleasant; music is an example. In that case a main application is room acoustics, since the purpose
of room acoustical design and optimisation is to make a room sound as good as possible. But some noises can also be
unpleasant and make people feel uncomfortable. In fact, noise reduction is actually a main challenge, in particular in the
industry of transportations, since people are becoming increasingly demanding. Furthermore, ultrasounds also have applications
in detection, such as sonar systems or non-destructive material testing. The articles in this wikibook describe the
fundamentals of acoustics and some of the major applications.
