Noise is a general term for unpleasant sounds. It will not only affect our lives but even do harm to our bodies. In order to prevent noise, there have been experiments on parametric and directional speaker systems since the early 1960s. So, what is a directional speaker?What is Directional Speaker?T

Due to the influence of COVID-19, "body temperature measurement" is already a daily need of people. Therefore, the forehead thermometer is another popular product after masks, alcohol, disinfection water and other epidemic prevention materials.The circuit of the forehead gun is relatively simple. It

In the next few years, the global market for piezo buzzer materials is expected to expand. According to researchers, the compound annual growth rate (CAGR) is estimated at 0.4%. This work should be registered within the next four years. The piezo buzzer component industry recently released a market