Audio Harmonic Rectification > 자유게시판

Harmonic distortion occurs when the signal is forced through a system with a frequency-compromised response, رله الکترونیکی resulting in frequencies not present in the original signal being introduced.
These added frequencies can greatly reduce the overall audio quality and noise level.
One approach to mitigate this problem is by using a method called harmonic distortion cancellation.

Harmonic distortion cancellation is based on a mathematical approach developed by Richard Goldman and Thomas Wüthrich in the 1930s.
The basic idea is to subtract a set of noise sources, calculated based on the signal being processed, from the original signal.
The result is a residual that typically contains mostly noise not related to the original signal content.

To achieve effective harmonic distortion cancellation, there are several key considerations.
The first is that a lot more of the even harmonics must be cancelled than the odd harmonics to ensure that even harmonic content i.e., 6th harmonic, does not raise to audible levels.

The second involves choosing a wideband filter that is as stable as possible and using frequency compensation to adjust circuit parameters to include as much of the low frequency spectrum possible.
This is more likely to effectively reduce noise produced by "non-periodic" background noise.

However, the process of removing the reference frequency from a signal along with its associated frequencies is a highly difficult one, mainly due to issues with frequency of operation frequency.

Fortunately, in the past several years there may have been solid research conducted in this area specifically regarding how to effectively nullify audio imperfections such as these caused by harmonic distortion within different environments that host sound waves having the lowest frequencies and the lowest frequencies that exist.