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More about IMD - Audio Precision
https://www.ap.com/technical-library/more-about-imd/#:~:text=IMD%20stands%20for%20Intermodulation%20Distortion.%20IMD%20is%20created,a%20non-linear%20device%20to%20produce%20undesired%20new%20tones.
What is intermodulation? - Shure
https://service.shure.com/s/article/what-is-intermodulation?language=en_US
Selecting the operating frequency of a wireless audio system is a two-step process: first, choose an appropriate radio frequency band; second, choose the appropriate operating frequency (or frequencies) within that band. ... The most important type of interaction is called intermodulation (IM), and it arises when signals are applied to "non ...
Intermodulation distortion (audio) - Glossary - Federal ...
http://www.digitizationguidelines.gov/term.php?term=intermodulationdistortionaudio
Intermodulation causes spurious emissions that can create minor to severe interference to other operations on the signal. Although IMD may affect many types of signal data, this definition focuses on sound. Intermodulation should not be confused with general harmonic distortion (which does have widespread use in audio effects processing; see ...
Intermodulation – PS Audio
https://www.psaudio.com/pauls-posts/intermodulation/
Intermodulation. When we think about distortion products we are generally referring to the harmonic kind. Harmonics are naturally occurring byproducts of sound: a plucked string will generate the intended frequency (called the first harmonic) and then higher versions of that note, each slightly less loud than its predecessor.
Intermodulation Distortion (IMD)
https://sound-au.com/articles/intermodulation2.htm
Audio engineers do consider sum and difference frequencies to be part of intermodulation distortion, since they are produced by the same mechanism that creates other IMD products. In a circuit with symmetrical distortion, these products are not evident at measurable levels, and they only appear if the distortion is asymmetrical.
Intermodulation Analysis – Wireless ProAudio
https://intermodulationanalysis.com/
Proper wireless audio configuration requires an understanding of intermodulation distortion (IMD) and its potentially crippling effect on your live production. As RF environments have become spectrally congested then frequency coordination plays an …
Intermodulation Distortion - Diagnostics of Audio Systems
https://klippel.de/know-how/measurements/nonlinear-distortion/intermodulation-distortion.html
The figure to the left illustrates the interpretation of the intermodulation distortion measurement using a fixed low frequency tone f 1 and a high frequency tone f 2 which is varied over the audio band (“voice tone sweep”). While the stiffness nonlinearity can not produce significant intermodulation, the other nonlinearities generate wide-band distortion which can not be …
Harmonic and Intermodulation Distortion | Audio Science ...
https://www.audiosciencereview.com/forum/index.php?threads/harmonic-and-intermodulation-distortion.25436/
Figure 1 shows a 1 kHz voltage signal with 1% second harmonic distortion (HD2) added. The spectral analysis (FFT, fast Fourier transform) shows the second harmonic at 40 dB below (-40 dB) the (0 dB) signal. So, 1% distortion is 40 dB below the signal level. Recall that dB = 20log (x), 1% is 1/100 = 0.01, and 20log (0.01) = -40 dB.
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