Speaking of crystal oscillator, we all know that crystal oscillator is a kind of frequency component. To put it simply, the components with frequency identification belong to frequency components. In addition to crystal oscillator, which other components also belong to frequency components. Atomizing film, atomizing film is a frequency element widely used in beauty humidifier, water replenishment instrument, industrial humidification and other fields. The common atomizing film has a circular appearance. Therefore, unlike quartz crystal oscillator, we often use diameter to describe the package size, and the frequency of atomizing film also has a certain corresponding relationship with the diameter of atomizing film. For example, in microporous atomizing film, the diameter of 13.8mm corresponds to about 150kHz and 160kHz, The diameter of 16mm corresponds to 110108khz, and the diameter of 20mm corresponds to 110khz; In addition, the common frequencies of a ceramic surface atomizer are 1.7m and 2.4m filters. Ceramic filters and acoustic surface filters are two categories of filters. The common frequencies of ceramic filters are 10.7m, 455khz and 465kHZ, and they are mainly packaged with plug-ins. There is also a certain correspondence between the frequency of the acoustic surface filter and the package. The common frequencies are as follows: 315m, 418m, 433.92m.