You can download the e-book for free and without registration
Listening devices. Circuitry of commercial intelligence tools. Rudometov E.A., 2002.
You can download other books, magazines, manuals, as well as diagrams and service manuals in our Free online technical library.
Directional microphones are electronic devices that provide remote acoustic control, carried out at a considerable distance (tens and hundreds of meters) from the object of observation. They usually consist of a highly sensitive microphone, special means to provide a narrow radiation pattern, a low-noise amplifier incorporating appropriate interference suppression ...
In a modern technology world where distance is becoming increasingly commonplace, maintaining connection and a sense of closeness is important. Recent developments in artificial skin by German scientists from Saarland University represent a new era in virtual interactions. German researchers from Saarland University have developed ultra-thin films that can transmit the sensation of touch over a distance. This cutting-edge technology provides new opportunities for virtual communication, especially for those who find themselves far from their loved ones. The ultra-thin films developed by the researchers, just 50 micrometers thick, can be integrated into textiles and worn like a second skin. These films act as sensors that recognize tactile signals from mom or dad, and as actuators that transmit these movements to the baby. Parents' touch to the fabric activates sensors that react to pressure and deform the ultra-thin film. This ... >>
Taking care of pets can often be a challenge, especially when it comes to keeping your home clean. A new interesting solution from the Petgugu Global startup has been presented, which will make life easier for cat owners and help them keep their home perfectly clean and tidy. Startup Petgugu Global has unveiled a unique cat toilet that can automatically flush feces, keeping your home clean and fresh. This innovative device is equipped with various smart sensors that monitor your pet's toilet activity and activate to automatically clean after use. The device connects to the sewer system and ensures efficient waste removal without the need for intervention from the owner. Additionally, the toilet has a large flushable storage capacity, making it ideal for multi-cat households. The Petgugu cat litter bowl is designed for use with water-soluble litters and offers a range of additional ... >>
The stereotype that women prefer "bad boys" has long been widespread. However, recent research conducted by British scientists from Monash University offers a new perspective on this issue. They looked at how women responded to men's emotional responsibility and willingness to help others. The study's findings could change our understanding of what makes men attractive to women. A study conducted by scientists from Monash University leads to new findings about men's attractiveness to women. In the experiment, women were shown photographs of men with brief stories about their behavior in various situations, including their reaction to an encounter with a homeless person. Some of the men ignored the homeless man, while others helped him, such as buying him food. A study found that men who showed empathy and kindness were more attractive to women compared to men who showed empathy and kindness. ... >>
Random news from the Archive
alcohol sensor
07.04.2004
The American company "SpectRx" has developed a miniature system for continuous monitoring of the presence of alcohol in human blood. It is possible that such devices will soon be used where drinking alcohol during work can lead to large material and human losses, for example, for pilots or nuclear power plant operators.
A special laser perforator makes four shallow holes in the human skin with a hair diameter. The operation is almost insensitive. Then a flat sensor is glued to this place, periodically sucking lymph droplets from the holes. If alcohol appears in the lymph, the sensor reports this by radio to the computer, which raises the alarm.
Human trials are already underway, and the practical application of the system could begin in three years.
Arabic
Bengali
Chinese
English
French
German
Hebrew
Hindi
Italian
Japanese
Korean
Malay
Polish
Portuguese
Spanish
Turkish
Ukrainian
Vietnamese
Link to download the e-book
Latest news of science and technology, new electronics:
All languages of this page