השוואת שיטות
סקרו את השיטות שבחרתם זו לצד זו; שורות שבהן יש הבדל מודגשות.
| עיצוב אלומה (Beamforming)× | שפופרת עכבה (אימפדנס)× | |
|---|---|---|
| תחום | אקוסטיקה | אקוסטיקה |
| משפחה | Process / pipeline | Process / pipeline |
| שנת המקור≠ | 1988 | 1866 |
| הוגה השיטה≠ | Van Veen, Barry Buckley | August Kundt |
| סוג≠ | Directional audio array processing | Acoustic absorption measurement |
| מקור מכונן≠ | Van Veen, B. D., & Buckley, K. M. (1988). Beamforming: A versatile approach to spatial filtering. IEEE ASSP Magazine, 5(2), 4–24. DOI ↗ | ASTM E1050-19 (2019). Standard Test Method for Impedance and Absorption of Acoustical Materials Using a Tube, Two Microphone and a Digital Frequency Analysis System. American Society for Testing and Materials. link ↗ |
| כינויים | beamformer, spatial filtering, microphone array, phased array | kundt tube, resonance tube, acoustic absorption, sound absorption coefficient |
| קשורות | 5 | 5 |
| תקציר≠ | Beamforming is a spatial signal processing technique that uses microphone arrays to selectively enhance sound from a desired direction while suppressing sounds from other directions. Formalized by Van Veen and Buckley in 1988, beamforming is fundamental to hands-free speech communication, hearing aids, sonar, radar, and spatial audio recording. It enables 'listening' with directional sensitivity despite using omnidirectional microphones, by exploiting time delays and phase differences between array elements. | An impedance tube (or Kundt tube) is a laboratory apparatus for measuring the acoustic absorption coefficient and surface impedance of materials. Originally developed by August Kundt in 1866, the technique has been standardized by ASTM and ISO for characterizing noise-control and acoustic-treatment materials. The impedance tube method is simple, portable, and cost-effective, making it the industry standard for pre-design acoustic material selection and quality control. |
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