Which device converts electricity into acoustic energy?

Microphone

Headphone

Amplifier

Preamplifier

Headphones are a pair of small loudspeaker drivers worn on or around the head over a user's ears. They are electroacoustic transducers, which convert an electrical signal to a corresponding sound.

Mikael Altemark wikipedia → Headphones

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the Netherlands

62%

16%

12%

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59%

18%

13%

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19%

51%

23%

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50%

29%

172

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25%

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458

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10237

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370

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26%

10%

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20%

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10%

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31%

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33%

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40%

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10%

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44%

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32%

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68%

18%

What does HTC stand for in the HTC Corporation name?

High Tech Computer

Hanoi Telephone Communication

Hybrid Telephone Casing

High Temperature Cooling

What material is computer's processor made of?

single crystal ruby

single crystal silicon

silicon polycrystal

pyrite crystal

Which type of transmission uses the shortest waves?

Which device converts an acoustic wave into an electrical signal?