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The sound source creates vibrations in the environment. Sound waves are generated by a sound source, such as a vibrating hole in a stereo speaker. Sound can travel through media such as air, water and solids such as longitudinal waves and shear waves in solids. On the other hand, the sound engineer deals with the recording, processing, mixing, and reproduction of sound.Īpplications of acoustics can be found in almost all spheres of life in modern society disciplines include aeroacoustics, audio signal processing, architectural acoustics, bioacoustics, electroacoustics, environmental noise, musical acoustics, noise control, psychoacoustics, speech, ultrasound, underwater acoustics, and other vibration. A scientist working in the field of acoustics is an acoustician, and someone working in an acoustic engineering field might be called an acoustic engineer. Different types of animals have different hearing ranges.Īcoustics is an interdisciplinary science that studies mechanical waves in gases, liquids and solids including vibration, sound, ultrasound and infrasound. Sound waves below 20 Hz are known as infrasound. Sound waves above 20 kHz are known as ultrasounds and cannot be heard by humans.

In air at atmospheric pressure, they are sound waves with wavelengths ranging from 17 meters (56 feet) to 1.7 centimetres (0.67 inches).

Only acoustic waves with frequencies between 20 Hz and 20 kHz, the audio frequency range, induce auditory perception in humans. In human physiology and psychology, the sound is the reception of such waves and their perception by the brain. In physics, the sound is a vibration that propagates as an acoustic wave through a transmission medium such as a gas, liquid, or solid.

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