Software can correct those distortions by warping the image with a reverse distortion. THD+N means total harmonic distortion plus noise. Noise is not the same as signal distortion caused by a circuit. This leads to high harmonic distortion, which is often undesirable. They utilized VanGaalen's guitars for added distortion and reverb. Sound engineers prevent unwanted, unintended distortion and clipping using a number of methods. Fourier analysis can be used to calculate the total harmonic distortion (THD). Ayurveda uses vibrations which are said to correct this supposed sound distortion. Panoramas with fisheye distortion predate the fisheye lens. Total harmonic distortion (THD), as a percentage. Hz, low distortion and fast transient response. Critical thinking includes identification of prejudice, bias, propaganda, self-deception, distortion, misinformation, etc. Shift register settings for noises/distortion. Micropsia is the most common visual distortion, or dysmetropsia. Townshend and Entwistle were instrumental in making extreme volumes and distortion standard rock practices.