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| Mascheramento Psicoacustico× | Controllo Attivo del Rumore FxLMS× | |
|---|---|---|
| Campo | Acustica | Acustica |
| Famiglia | Process / pipeline | Process / pipeline |
| Anno di origine≠ | 1961 | 1975 |
| Ideatore≠ | Eberhard Zwicker | Bernard Widrow, Samuel Stearns |
| Tipo≠ | Perceptual model for audio systems | Adaptive noise cancellation algorithm |
| Fonte seminale≠ | Zwicker, E., & Scharf, B. (1965). Psychoacoustics: Facts and Models. Springer-Verlag. ISBN: 978-3540631644 | Widrow, B., & Stearns, S. D. (1975). Adaptive signal processing for active vibration and noise control. IEEE Transactions on Acoustics, Speech, and Signal Processing, 23(5), 440–453. DOI ↗ |
| Alias | masking, temporal masking, frequency masking, auditory masking | FxLMS, filtered-x LMS, active noise cancellation, ANC |
| Correlati | 5 | 5 |
| Sintesi≠ | Psychoacoustic masking describes how the human auditory system suppresses the perception of weak sounds in the presence of stronger sounds. Formalized by Eberhard Zwicker in the 1960s, masking is a fundamental phenomenon in hearing and the basis for perceptual audio coding (MP3, AAC, OPUS). Masking occurs both in frequency (spectral masking) and time (temporal masking), and understanding these effects enables efficient audio compression and realistic sound design. | The Filtered-x Least Mean Squares (FxLMS) algorithm is an adaptive filter used in active noise control (ANC) systems to reduce unwanted sound by generating anti-noise. Pioneered by Widrow and Stearns in 1975 and refined by Eriksson and colleagues, FxLMS is the most widely deployed algorithm in commercial noise-canceling headphones, hearing aids, automotive cabins, and industrial noise barriers. It works by continuously learning the acoustical path and dynamically adjusting a canceling signal in real time. |
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