Headphone

Headphone,earplugs is a small electro-acoustic device, it can convert the audio signal into a sound signal.

Headphone and earplugs are mainly used in pocket radios and single players to replace loudspeakers for sound use.

There are many kinds of headphones, but the common earphones or earplugs are divided into two categories according to the structure, one is electromagnetic type, the other is the moving coil type.

In addition to the two types of headphones, there are piezoelectric earphones and infrared headphones.

Piezoelectric earphones are made of materials with piezoelectric effect, such as piezoelectric crystals, piezoelectric ceramics, piezoelectric polymers, etc.

The piezoelectric earphone has simple structure, which is mainly composed of a piezoelectric piece, a diaphragm and a shell. When the audio signal is added to the piezoelectric plate, the piezoelectric plate produces an inverse piezoelectric effect to be deformed, so that the vibration film is driven to vibrate, so as to make a sound. The piezoelectric earphone has the characteristics of simple structure, small size, good moisture resistance, etc. It is mainly used for the replay of the speech system.

The infrared headphones uses the infrared transmission, does not need the conductor and the amplifying circuit connection, it has the characteristics of wide frequency range, high sensitivity, small distortion, etc.

This article is from Allicdata Electronics Limited.