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| Impedance Tube× | RT60 Efterklangstid× | |
|---|---|---|
| Ämnesområde | Akustik | Akustik |
| Familj | Process / pipeline | Process / pipeline |
| Ursprungsår≠ | 1866 | 1900 |
| Upphovsperson≠ | August Kundt | Wallace Clement Sabine |
| Typ≠ | Acoustic absorption measurement | Room acoustic descriptor |
| Ursprungskälla≠ | 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 ↗ | Sabine, W. C. (1900). Collected Papers on Acoustics. Dover Publications. link ↗ |
| Alias≠ | kundt tube, resonance tube, acoustic absorption, sound absorption coefficient | RT60, reverberation time, decay time |
| Närliggande | 5 | 5 |
| Sammanfattning≠ | 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. | RT60 (reverberation time) is the duration required for sound energy in a room to decay by 60 decibels after the source stops. Pioneered by Wallace Clement Sabine in 1900, RT60 is the most widely used single-number descriptor of room acoustic properties. It reflects how much sound is absorbed versus reflected by room surfaces and directly affects speech intelligibility, music clarity, and acoustic comfort. |
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