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There are quite a few ways that a noise could be stopped from reaching a listening device. In the case in your question, with a noise generator, it might work in two different ways - Destructive interference - The noise generator samples sound from a fixed distance, and creates it's own sound in 'anti-phase' of the sound it is sampling. With the correct calculations and properties, this anti-phase sound would cancel out the original sound. Overloading the device - Much in the same way being in a crowd of noisy people makes listening to someone next to you much more difficult, you could have a directed sound generation at the listening device, overwhelming it. This method is more brute force than the aforementioned. There are problems with both of these of course. Destructive interference is very hard to regulate, as depending on the distance of the source, the anti-phase signal will have to change. So the sound you were covering up would have to originate at a more or less stationary point. This can be solved by having multiple anti-phase points, but it's messy and gets very expensive. With regards to overloading the source, you'd have to know where the source was, unless you just wanted to blast the entire area!
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What is LNB related to telecom?
Low noise block-downconverter.A low noise block-downconverter (or LNB) is the receiving device of a parabolic satellite dish antenna of the type commonly used for satellite TV reception. The device is sometimes called an LNA (for low noise amplifier), LNC (for low noise converter) or even LND (for low noise downconverter) but as block-downconversion is the principal function of the device, LNB is the preferred term, although this acronym is often incorrectly expanded to the incomplete descriptions, low noise block or low noise block converter.
What are the best features to look for in a personal noise cancelling device?
When choosing a personal noise cancelling device, look for features like active noise cancellation, adjustable settings, long battery life, comfortable fit, and good sound quality. These features can help provide effective noise reduction and a pleasant listening experience.
Do you know which device I need to buy that will block outside noise I have seen one in duty free in a headphone section but forgot what it was called?
They are called "noise-canceling headphones", and the technology is called "active noise-canceling"
Is there any outdoor noise cancelling equipment?
There seems to be none available in the market which can be used as a general utility device for an outdoor environment. In any case noise cancellation can work for a specified area only and that too with a single focal point. However, such a noise cancellation equipment shall be adding more noise to the environment away from the perimeter of the device zone due to interference of the sounds. One of the interesting sites is www.comfozone.com. One mans noise cancellation device could turn into anothers noise generator!
What is the function of headphones?
are a audio output device that allows audio to be played from them
What are three types of noise that can block communication?
what are the three types of noise that block communication
What is the difference between Signal-to-Noise Ratio (SNR) and Noise Reduction Rating (NRR) in the context of audio equipment?
Signal-to-Noise Ratio (SNR) measures the quality of the signal compared to the level of background noise, indicating how clear the audio is. Noise Reduction Rating (NRR) quantifies how much external noise is reduced by a device, such as headphones or earplugs, to improve the listening experience.
What is the best noise blocking device for a room to create a peaceful and quiet environment?
The best noise blocking device for a room to create a peaceful and quiet environment is a soundproofing system that includes acoustic panels, heavy curtains, and weatherstripping for doors and windows. These materials help absorb and block out unwanted noise, creating a more serene atmosphere.
A Low Noise Block Down Converter Active or Passive Device?
A Low Noise Block Down Converter (LNB) is an active device. It amplifies the weak signals received from satellite dishes and converts them from a higher frequency to a lower frequency for easier processing. The active components, such as amplifiers and oscillators, are essential for its function, differentiating it from passive devices that do not provide amplification or signal processing.
What is a noise generator used for?
A noise generator produces electrical signals in both audio and video format. These are used for troubleshooting purposes in signal circuits for amplifiers and televisions.
What is the noise reduction rating definition and how does it impact the effectiveness of noise-canceling headphones?
The noise reduction rating (NRR) is a measure of how well hearing protection devices, like earplugs or headphones, can reduce noise exposure in decibels. A higher NRR indicates better noise reduction. In the case of noise-canceling headphones, a higher NRR means they can effectively block out more external noise, providing better overall noise reduction and a quieter listening experience.
What is the function of an LNB for satellite television?
LNB stands for Low Noise Block. This device amplifies the weak incoming signal from the satellite and converts it to a signal that is usable by the television.
