What is sound insulation and sound insulation?

Sound insulation is a method of reducing noise in the path of sound wave propagation. Its effect is more obvious than sound absorption and noise reduction, so sound insulation is an effective measure to obtain a quiet building acoustic environment. According to the way of sound

Developed technologies for 3D printing of skin and joints

At present, more than 20 million people in Japan need to transplant skin, bones, cartilage and joints. The University of Tokyo Medical School Affiliated Hospital announced that its research team has used 3D printers and genetic engineering technology to successfully develop technologies th

Mobile phone PCB reliability design

The increase in the functionality of mobile phones has become increasingly demanding on PCB design. With the arrival of a round of Bluetooth devices, cellular phones and the 3G era, engineers are paying more and more attention to the design techniques of RF circuits. This article refers to the a

Health: Women must eat 25 anti-aging foods after 25 years old

It is rich in nutrients, improves immunity, and loses weight. Mushrooms contain a lot of nutrients such as inorganic substances, vitamins and protein, but the calories are very low, and they often do not gain weight. Yogurt not only helps digestion, but also effectively prevents intestinal infection

BlackBerry CEO resigns

The latest news, BlackBerry, gave up its plan to sell the company on Monday and announced the resignation of its CEO, Thorsten Heins. The news caused the BlackBerry's stock price to fall 16%, causing people to worry that the troubled BlackBerry will have no choice. BlackBerry said tha

Lighting LED driver solution analysis (Figure)

Editor's note: The emergence of a large number of light-emitting diodes (LEDs) as solid-state light sources has made incandescent lamps increasingly backward. In the past few years, LED technology has made great progress, and advances in heat dissipation, packaging, and process

Is the chip the same as the lamp bead?

According to the problems of this series, the two concepts are completely different between the chip and the lamp bead. The chip is part of the process of forming the lamp bead. In the manufacturing process of the lamp bead, the bracket is included, and the chip lens lamp is composed. The components