The main components of the oxygen inhaler circuit are composed of PIC16C57, 78L05, ULN2003A and other components. Oxygen inhaler circuit composed of PIC16C57 (click to enlarge):
In-ear earphones, also known as ear canal earphones, are used inside the human hearing organs and, according to their design, sealing the user's ear canal. In-ear earphone is inserted into the ear canal with a gel plug, to obtain better airtightness, on the basis of the ordinary earphone, which greatly increasing the performance of in-ear earphone.
Advantages:
1: Reduce the interference of external noise on music.
2: Provide a closed environment that greatly reduces leakage. From a practical point of view - in a noisy environment,you can enjoy music with a relatively low volume.
3:Increase the low frequency texture and volume.
4:Adding to the performance of the music details.
The catheter of these headphones are connected to the earmuffs into the front half of the ear canal to create a sealed listening environment. And many high-end in-ear earphones even custom-made eardrums for the best comfort and perfect sound insulation.
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Shenzhen Linx Technology Co., Ltd. , https://www.linxheadphone.com