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| Akustinen holografia× | Psykoakustinen naamiointi× | |
|---|---|---|
| Tieteenala | Akustiikka | Akustiikka |
| Menetelmäperhe | Process / pipeline | Process / pipeline |
| Syntyvuosi≠ | 1985 | 1961 |
| Kehittäjä≠ | James Maynard, Earl Williams, Yongjian Lee | Eberhard Zwicker |
| Tyyppi≠ | Sound field reconstruction method | Perceptual model for audio systems |
| Alkuperäislähde≠ | Maynard, J. D., Williams, E. G., & Lee, Y. (1985). Near-field acoustic holography: I. Theory of generalized holography and the development of NAH. Journal of the Acoustical Society of America, 78(4), 1395–1413. link ↗ | Zwicker, E., & Scharf, B. (1965). Psychoacoustics: Facts and Models. Springer-Verlag. ISBN: 978-3540631644 |
| Rinnakkaisnimet | NAH, near-field acoustics, sound field mapping, acoustic imaging | masking, temporal masking, frequency masking, auditory masking |
| Liittyvät | 5 | 5 |
| Tiivistelmä≠ | Near-Field Acoustic Holography (NAH) is a technique for reconstructing 3D acoustic sound fields and visualizing sound radiation from sources by measuring pressure at a dense microphone array in the near field. Pioneered by Maynard, Williams, and Lee in 1985, NAH extends holographic principles from optics to acoustics, enabling detailed acoustic source characterization, noise source identification, and acoustic field visualization that is impossible with conventional single-point or line-array methods. | 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. |
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