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| en:iot-open:hardware2:actuators_sound [2023/11/14 15:25] – pczekalski | en:iot-open:hardware2:actuators_sound [2023/11/23 10:39] (current) – pczekalski | ||
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| - | ==== Sound Output Devices ==== | + | ====== Sound Output Devices |
| - | + | {{: | |
| - | === Speaker | + | == Speaker == |
| Speakers are electroacoustic devices that convert electrical signals into sound waves. A speaker uses a permanent magnet and a coil attached to the membrane. Sound signal flowing through the coil creates an electromagnetic field with variable strength; the coil attracts a magnet according to the strength of the field, thus making a membrane vibrate and creating a sound wave.\\ | Speakers are electroacoustic devices that convert electrical signals into sound waves. A speaker uses a permanent magnet and a coil attached to the membrane. Sound signal flowing through the coil creates an electromagnetic field with variable strength; the coil attracts a magnet according to the strength of the field, thus making a membrane vibrate and creating a sound wave.\\ | ||
| Another widely used speaker technology, called piezo speaker, uses piezoelectric materials instead of magnets.\\ | Another widely used speaker technology, called piezo speaker, uses piezoelectric materials instead of magnets.\\ | ||
