From electrostatics, we know that for parallel plate capacitors, there is the following relationship: C=ε. S/L ……①That is, the capacity of the capacitor is proportional to the dielectric constant of the medium, proportional to the area of ​​the two plates, and inversely proportional to the distance between the two plates.In addition, when a capacitor is charged with the amount of charge of Q, then the two

The car navigation system includes three parts: car navigation terminal, digital map, and navigation platform. Among them, the digital map and navigation platform are all served in the background, and the software and hardware environment can be free from any restrictions; the car navigation terminal (VNT) is not, because the harsh working environment and limited software and hardware conditions bring great research and development

Noise is personally disliked, especially for drivers. Tire noise, wind noise and engine noise will all destroy the good driving atmosphere.But don’t worry, your car will soon have active noise reduction.Foreign media reported that Ford, like Toyota, General Motors and other automakers, has begun to introduce noise cancellation technology into its auto products. This active noise reduction

You can control your voice with one hand, and you can sing whenever you want. This is not a problem. Based on K-song platforms such as National K-Song, Sing Bar, and Inke, etc., even if the tone is not complete, you can immediately have a handheld Mai Pa channel. If you want to sing well and happily, it is not enough to rely on singing skills. If you are only pursuing loud singing, you can only say that you are OUT. How to stand

According to electrostatics, for parallel plate capacitors, there is the following relationship: C=εS/4πkd...①That is, the capacity of the capacitor is proportional to the dielectric constant of the medium, proportional to the area of ​​the two plates, and The distance between the two plates is inversely proportional.In addition, when a capacitor is charged with the amount of charge of Q, then the

The microphone, whose scientific name is a microphone, is an energy conversion device that converts sound signals into electrical signals. It is translated from Microphone. Also called microphone and microphone. In the twentieth century, microphones developed from acoustic-electric conversion through resistance to inductive and capacitive conversion. A large number of new microphone technologies were gradually

1. Sensitivity (Sensitivity is generally defined as: the efficiency of the microphone's acoustic-electric conversion. It is expressed in dB. It is set to 0dB=1V in the relevant microphone test standards, so the sensitivity values ​​of the microphones are all negative values. For example:- The sensitivity of a 58dB microphone is generally selected between -28 and 66 dB, and different applications have different sensitivity requirements.

With the widespread application of smart mobile devices, car USB universal serial bus chargers are necessary. Mobile phones can transmit data to the car's central control host through the USB port. Just like plugging in a USB disk, it can play music. The control host can be interconnected with the mobile phone, and the car's central control screen can be synchronized with the navigation. Iphone connected carplay, Android mobile phone

Mainly the USB port of the car host provides sufficient power for external devices (including USBA & USBC ports), designed to supply power for larger portable electronic products such as laptops, which can increase the power supply of the original USB standard, and USB PD charging The USB port power supply terminal and the electric device communicate and shake hands through a certain protocol to determine the charging

here are often some purchases. When purchasing microphones (microphones), I can’t understand the "sensitivity". Now, a simple analysis is as follows:Sensitivity refers to the size of the electrical signal output by the microphone under the action of a certain intensity of sound. High sensitivity means that the microphone’s sound-to-electrical conversion efficiency is high, and it is sensitive to weak sound signals