Microphones and radio microphones. Schemes, articles of the Free Technical Library

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Microphones and radio microphones. Schemes, articles, descriptions

Free library / Schemes of radio-electronic and electrical devices

Microphones and radio microphones

We recommend reading in our Free Technical Library:

Stabilized power supplies for the player

Section Power supplies. There are more and more household devices powered by 3 V (two miniature batteries or accumulators). Most cassette players, voice recorders and pocket radios are designed for autonomous operation, but in stationary conditions, in order not to discharge the batteries, it is more convenient to power them from a 220 V network through an appropriate adapter. This requires a stabilized source with a voltage of 2,4...2,9 V, providing a load current of up to 0,3...0,5 A ... >>

Laptop battery repair

Section Chargers, batteries, galvanic cells. The most vulnerable part of a laptop in terms of the number of failures is the battery. Despite the fact that you are using a regular AC adapter, the battery efficiency gradually decreases - less and less time is left for autonomous work. Eventually the battery will have to be replaced. But, the battery is a very expensive component, if a new laptop can now be purchased for $800 and much lower, then the battery costs about $200. And besides, infrequently on sale you can find exactly the battery that you need, especially if the laptop is already old ... >>

Speech phase limiter

Section Nodes of amateur radio equipment. Signal limiters, compressors. To improve communication efficiency, almost all radio stations use methods to compress the dynamic range of the speech signal. But the operation of these devices at industrial production stations does not suit everyone. This is especially true for car stations in the MW range, when operating in FM mode. Basically, these stations have simple limiters, without proper pre- and post-processing of the signal. To reduce the high level of distortion, the signal is filtered early, below 2.5 kHz ... >>

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Articles on microphones and radio microphones

Articles on microphones and radio microphones; schemes of microphones and radio microphones; descriptions of microphones and radio microphones: 58 articles

Latest news of science and technology, new electronics:

Artificial leather for touch emulation 15.04.2024

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 ... >>

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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

Cigarettes and alcohol lead to dementia 13.07.2013

In people who smoke and drink a lot, dementia occurs much faster, according to a study by psychiatrists at University College London (UK).

Many people know about the dangers of smoking and alcohol, about the dangerous diseases that bad habits cause. However, people do not always think that by smoking another cigarette or drinking another glass, they bring themselves closer to dementia or, simply speaking, dementia. Researchers have shown that smokers who also abuse alcohol develop dementia 36% faster than those who do not smoke and drink moderately.

Prior to this, researchers have already noted that smoking and alcohol separately contribute to the development of dementia. However, for the first time, psychiatrists drew attention to the combination of these factors, and found that the effect is really detrimental.

The research team evaluated 6473 adults (4635 men and 1838 women) aged 45 to 69 over a 10-year period. All participants were asked questions about their drinking habits and smoking frequency. Next, the researchers assessed cognitive functions - the ability to reason, solve simple mathematical problems, memory, speech development, etc. Similar cognitive tests were conducted three times during the ten-year study.

It turned out that in smokers who abuse alcohol, cognitive decline occurred 36% faster than in non-smokers and moderate drinkers. Simply put, their brains wore out faster. We can say that in ten years of research, the brains of heavy drinkers smokers were "worn out" as if 12 years had passed.

Scientists hope that the results of their study will make people think. The influence of alcohol and smoking is detrimental not only to the lungs and liver, but also to the brain. The combination of smoking and alcohol accelerates the development of dementia, and it is unlikely that anyone at a relatively young age of 60 wants to forget where they put the keys or the name of their grandson, just because in their young and mature years they could not refuse themselves in an extra glass and a cigarette.

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