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TAKE TECH
6.7. 22:50
NHK WORLD-JAPAN
10 minutos
Talk into a microphone and your voice comes out from a speaker, loud and clear. Find out how the mic, speaker and amplifier work together to make sounds louder.
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inglés
Talk into a microphone and your voice comes out from a speaker, loud and clear. Find out how the mic, speaker and amplifier work together to make sounds louder.