The moving iron earphone refers to the use of an electromagnet to generate an alternating magnetic field. The vibrating part is an earphone in which an iron piece is suspended in front of the electromagnet, and when the signal passes through the electromagnet, the magnetic field of the electromagnet changes, thereby causing the iron piece to vibrate and sound. The moving iron earphone is transmitted to the center point of a micro diaphragm through a structurally rigid connecting rod to generate vibration and sound. Because the unit is much smaller, it can be easily placed in the ear canal. This practice effectively reduces the area of the ear portion into the deeper ear canal portion. The geometry of the ear canal is much simpler than that of the auricle. It belongs to a round shape, so a soft silicone sleeve can have good sound insulation and leakage prevention effect compared with the traditional earplug.
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