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Intermodulation Distortion (IMD)
https://sound-au.com/articles/intermodulation2.htm#:~:text=IMD%20%28intermodulation%20Distortion%29%20is%20one%20of%20the%20main,as%20well%2C%20and%20the%20converse%20is%20also%20true.
Intermodulation Distortion (IMD)
https://sound-au.com/articles/intermodulation2.htm
This is intermodulation distortion, and is shown at a representative level for an amplifier with a THD+N (total harmonic distortion plus noise) of around 0.013%. An amplifier with less distortion may show only the 7kHz tone, with the sidebands (they will be present) buried in the noise. The graph shown is somewhat optimistic, with a noise level of about -132dBV (250nV output noise, …
DISTORTION MEASUREMENT IN AUDIO AMPLIFIERS
https://renardson-audio.com/distortiontest.pdf
standard for audio power amplifiers specifies a maximum r.m.s. total harmonic distortion of 1 % for sine wave signals from 40 Hz to 12.5 kHz for any power output between 100 mW and 10 W and intermodulation distortion no more than 3 % at 10 W output for inputs of 250 Hz and 8 kHz with an amplitude
Intermodulation distortion of class D audio amplifier ...
https://www.researchgate.net/publication/305421539_Intermodulation_distortion_of_class_D_audio_amplifier_using_pulse_density_modulation
audio signal is substantially determined by intermodulation distortion (IMD). Some audio engineers have even claimed that IMD is more important than …
High Quality Audio Amplification
http://www.r-type.org/articles/art-003a.htm
The principal form of distortion occurring in the output from amplifying equipment is non-linear distortion which is normally divided into harmonic, intermodulation and beat-note distortion. Each sub-division contributes some power to the amplifier output at frequencies which differ from those occurring in the input signal.
Is High-Frequency Intermodulation Distortion a …
https://www.aes.org/e-lib/download.cfm/20459.pdf?ID=20459
Intermodulation distortion arises when a non-linearity causes two or more signals to in-teract. We investigated this distortion mechanism by measurement and listening tests using three models of high-quality loudspeaker. Our aim was to discover whether intermodulation distortionofultrasonic(i.e.,above20kHz)signalelementscouldleadtotheirdetectabilityand
Intermodulation Distortion (IMD) Sound Test - Audio Check
https://www.audiocheck.net/testtones_imd.php
Intermodulation distortion (IMD) measures the level of unwanted combinations of different frequencies found in the input signal. IMD adds components to the sound that are not found in the original signal. This effect results from non-linearities in your audio system.
Understanding Specifications: Car Audio Amplifier …
https://www.bestcaraudio.com/understanding-specifications-car-audio-amplifier-distortion/
The level of the distortion is significant at -48.3 dB or 0.384 percent. Here is a high-quality amplifier playing the same 1 kHz test tone at the same 2.0 Vrms level. There is significantly less harmonic distortion added to the output signal. The peak is at a level of -85.4 dB or 0.00513 percent. Intermodulation Distortion Explained
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