The application of noise sensors is increasing in today's society, and their importance is not only reflected in the field of scientific research, but also plays a key role in many aspects such as urban planning, environmental protection, and public health. A noise sensor is a type of sensor used to measure the level of noise in an environment. It usually consists of one or more acoustic sensors that can detect and measure noise of different frequencies. The following is the price list of noise sensors provided by ATO online store, hoping to provide you with reference.A rectifier is a device that converts alternating current into direct current, which can be used for power supply devices and detecting radio signals. It has two main functions. First, to convert alternating current (AC) into direct current (DC), which is filtered and supplied to the load or inverter. Secondly, provide charging voltage to the battery. Therefore, it also serves as a charger. Almost all electronic devices use rectifiers internally in their power supply. In power supplies, rectifiers are usually connected in series after transformers, smoothing filters, and possibly voltage regulators. Below, we discussed some applications of rectifiers.