Name: ヘッドホンの作り方 (HEADPHONES | How It's Made)
Uploaded: 2021-01-14T10:09:46.000Z
Duration: 5 min 8 s
Description: VoiceTubeの動画で発音を聞きながら英語表現を覚えよう！学べる英語：

in the early part of the 20th century, headphones were used mainly by telephone operators on radio technicians, but in the 19 thirties they were redesigned on, marketed to the public, so music lovers everywhere plugged in and turned onto the concept.

Everyone loves music, but not necessarily all the peoples.

Headphones allow people to listen without negative feedback from your neighbors to make high end headphones on injection.

Molding machine first makes the plastic speaker covers.

The mesh area will allow sound waves to pass through instead of reflecting back into the headphones, Equipment stamps, trademark and other information onto tomb or casing components.

A decorative metal disk on a plastic housing.

Copper wire around a cylinder hundreds of times the wire Is this thinness.

The winding is computer controlled to produce a critical component.

The headphones voice coil when magnetized by an incoming signal, the voice coil vibrates a diaphragm, causing it to a man.

Sound that diaphragm now take shape as a press applies heat and pressure to a plastic membrane.

The press moulds the plastic so it's thicker in the center and thinner around the outer zone.

This gives a wide and flat audio frequency range.

A technician punches out the molded shape.

She applies a bead of glue to the diaphragm, then positions the copper voice coil in an assembly device.

She aligns the glutes section of the dia from with the coil.

Ultraviolet light activates the glue to seal the coil to the dia friend.

Next technician installs the diaphragm and voice coil assembly on that housing.

This takes skill because the coil must be positioned precisely for the best sound quality.

This headphone speaker is now ready for an audio check, a technician test, the audio frequency, range distortion and other factors.

Here, a technician joins the ends of curved wires in a plastic clip.

They hold the headphones snugly over the years on, deliver audio signals from the left side of the headphones to the right.

The next technician installs a connector for the headphones.

Reliever on adjustable band will allow the headphones to fit on heads of all shapes and sizes.

Thea Parade oppresses the parts together with a hydraulic tools moving down the line.

A technician now joins the two halves of the speaker housing.

She forces the two parts together with a pneumatic tools and finishes it off with a decorative metal ring.

She inserts the speaker mechanism in the center of the housing than places plastic brackets over it for protection.

She done secures the entire assembly to the housing.

Next, she sold us too wise to each headphone speaker, A plastic ring and cover protected while still allowing the wires to protruding.

She attached is the end of the headband to the speakers, then sold us the wires from the speaker to those protruding from the headband.

She presses a plastic grill into place over each speaker very carefully to prevent scratching.

 Why it for sound on whether you like Pet Shop Boys or Pacini, your choice of music will be silent. 