好久被狂躁A片视频无码免费视频,久久国产精品人妻aⅴ,噜啊噜在线成人A片观看,毛片四川少妇贵州人

Speaker applications:

There are speakers in radios, televisions, and speakers.

Speaker Type of speaker:

1. Paper basin loudspeaker

The paper basin loudspeaker is also known as the moving coil loudspeaker. It is composed of three parts: (1) Vibration system, including conical paper basin, voice coil and centering support plate; (2) Magnetic circuit system, including permanent magnet, magnetic conductive plate and field core column; (3) Auxiliary system, including basin frame, patch board, holder and dust cover, etc. When the voice coil in the magnetic field has an audio current through, it produces a magnetic field that changes with the audio current, which interacts with the magnetic field of the permanent magnet, making the voice coil vibrate along the axis, because the speaker has a simple structure, full bass, soft sound quality, and wide frequency band, but the efficiency is low.

2, no. Cylinder-type loudspeaker

The structure of a horn loudspeaker is composed of two parts: a vibration system (tweeter head) and a horn. The vibration system is similar to a paper basin speaker, except that its diaphragm is not a paper basin, but a spherical top shaped diaphragm. The vibration of the diaphragm radiates sound waves into the air through the horn (after two reflections). Its high frequency, large volume, often used for outdoor and square sound reinforcement.