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Online Intermodulation Distortion (IMD) Sound Test

    https://www.audiocheck.net/testtones_imd.php#:~:text=Intermodulation%20Distortion%20%28IMD%29%20Sound%20Test%201%20Background.%20Intermodulation,much%20lower%20amplitude.%203%20The%20Sound%20Files.%20
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Intermodulation distortion (audio) - Glossary - Federal ...

    http://www.digitizationguidelines.gov/term.php?term=intermodulationdistortionaudio
    The percentage intermodulation distortion is defined as the percentage of amplitude modulation, represented by the second and third order pair of sidebands, of the high-frequency signal. Second order sidebands around the high frequency tone are spaced at a frequency equal to the low-frequency tone (FH ± FL). Third order sidebands are spaced at twice the low-frequency tone or …

Intermodulation Distortion - Diagnostics of Audio Systems

    https://klippel.de/know-how/measurements/nonlinear-distortion/intermodulation-distortion.html
    Loudspeakers and other electro-acoustical transducers generate significant intermodulation distortions in the audio band which have a significant impact on the perceived sound quality. The inductance nonlinearity L(x) produces low harmonic distortions at low frequencies but generates wide-band intermodulation which rise to significant values (30 %) at higher frequencies.

Intermodulation Distortion - sound-au.com

    https://sound-au.com/articles/intermodulation2.htm
    It covers the specific case of sum and difference frequencies in detail, showing how they may not appear at all, despite considerable harmonic and intermodulation distortion. IMD (intermodulation Distortion) is one of the main culprits that can make amplifiers sound 'bad'. It's heavily reliant on harmonic distortion (THD - total harmonic distortion plus noise), but not in …

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