Audio logic ratio circuit schematic

Probe high frequency needle JTK-50L-Q has 5 needles in the high frequency needle

Shunluo high frequency inductor, parallel stack inductor, shun winding inductor, authorized agent

Industrial Router Crystal 3.2*2.5mm 3225 26M (26.000MHZ) 12PF 10PPM 20PPM 30PPM

Audio, the frequency of any normal audible sound wave, refers to any frequency in the range of approximately 15 to 20,000 Hz. In fact, the sound of 20 Hz is not easy to hear! When the sound pressure is very large, it can be heard. At 20 Hz, it belongs to the subwoofer. The main sound zone of the bass is at 60 Hz, and the highest sound that the human ear can hear is 15.8 kHz, but the 16-19K is silent. The ultra-high frequency sound is generally felt by the vibration of the human skull. It is a feeling, and it can also be Say a sense of hearing, but you actually didn't hear it with your ears. Some sounds can be put at 35kHz, but it won't make sense to be taller.