What is Noise Cancellation?
>> Noise cancellation (also known as active noise control, active noise reduction (ANR) or antinoise) is a method for reducing unwanted sound. Modern noise cancellation is achieved through the use of a computer (the DSP), which analyzes the waveform of the background aural or nonaural noise, then generates a polarisation reversed waveform to cancel it out by interference. This waveform has identical or directly proportional amplitude to the waveform of the original noise, but its polarity is reversed. This creates the destructive interference that reduces the amplitude of the perceived noise.
Noise cancellation technology is a growing field that capitalizes on the combination of disparate technological advancements. The purpose of the technology is to cancel or at least minimize unwanted sounds. Modern lives seem full of all sorts of noise, some of which are dangerous to our ears. In fact, many people, especially those who live and work in cities, have very little quiet time during the day. Noise cancellation technology aims to remedy the excess noise that we experience. Of course there already are low-tech solutions to the problem. Ear-plugs and sound dampeners are available, but they are not very convenient nor very efficient. Noise cancellation tries to ‘block’ the sound at the source instead of trying to prevent the sounds from entering our ear canals. But how does it work? Sounds travel through the air or through liquids in the form of waves, and each of those waves has a particular shape. Noise canceling technologies first rely on small microphones that detect the sou
Noise cancellation technology is a growing field that capitalizes on the combination of disparate technological advancements. The purpose of the technology is to cancel or at least minimize unwanted sounds. Modern lives seem full of all sorts of noise, some of which are dangerous to our ears. In fact, many people, especially those who live and work in cities, have very little quiet time during the day. Noise cancellation technology aims to remedy the excess noise that we experience. Of course there already are low-tech solutions to the problem. Ear-plugs and sound dampeners are available, but they are not very convenient nor very efficient. Noise cancellation tries to ‘block’ the sound at the source instead of trying to prevent the sounds from entering our ear canals. But how does it work? Sounds travel through the air, or through liquids in the form of waves, and each of those waves has a particular shape. Noise cancelling technologies first rely on small microphones that detect the s
