Acoustics is the branch of physics that deals with the study of all mechanical waves in gases, liquids, and solids, including topics such as vibration, sound, ultrasound, and infrasound.
A scientist who works in the field of acoustics is an acoustician, while a person working in the field of acoustic technology may be called an acoustics engineer.
The application of acoustics is present in almost every aspect of modern society, the most obvious being the audio and noise control industries.
Hearing is one of the most essential means of survival in the animal world, and speech is one of the most distinctive features of human development and culture.
As a result, the science of acoustics extends to many facets of human society: music, medicine, architecture, industrial production, warfare, etc.
Similarly, animal species such as songbirds and frogs use sound and hearing as key elements in mating rituals or marking territories.
Art, craft, science and technology have provoked each other to advance the whole, as in many other areas of knowledge. The “Wheel of Acoustics” by Robert Bruce Lindsay is a well-accepted overview of the different areas of acoustics.

The word /"acoustic/" is derived from the Greek word ἀκουστικός (akoustikos), meaning /"of or to hear, ready to hear/" and that of ἀκουστός (akoustos), /"heard, audible/

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