Relating to the conversion between electrical signals and sound waves.
Compound of electro- (electricity) and acoustical (related to sound). Emerged in the 20th century as technology allowed engineers to translate between these two different types of waves.
This is the science behind speakers and microphones—they're doing something wild: turning invisible electrical wiggles into air vibrations you hear, or vice versa, and that transformation is what 'electroacoustical' describes.
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