DENJIRO: This is a cassette tape. Using this boombox, we can record and replay audio. Let's try it out using this deconstructed boombox. "Happy Energy! Happy Energy! Happy Energy!"
So just how do cassette tapes work? There is a long piece of tape inside. The audio is recorded onto here. Let me bring a magnet up to the tape. The tape is coated with a magnetic substance, so it reacted with the magnet. The magnetic substance is what records the audio data, so let's actually see the magnetic record. I'm going to coat the tape with a magnetic powder. Now, let's zoom in on it.
The parts where audio data is recorded are magnetized, so the magnetic powder gathers there. This is the audio data that is recorded onto a cassette tape.
Take a look at this. I have taken out the part of the boombox where you place the cassette tape. This here is the magnetic head, which records and replays audio. The magnetic head is an electromagnet. When we record audio on tape, the electromagnet changes the electrical signals of sound into varying magnetic strengths.
We can play a cassette tape using a magnetic head that's been taken out and a potter's wheel. Let's try it out.
That sounded like gibberish. Let's trying playing it backwards. "Happy Energy! Happy Energy!"
The audio was actually saying, "Happy Energy!"
I hope energy will bring you all happiness. Our magic word is "Happy Energy!"
18 сен 2024
