পদ্ধতির তুলনা করুন
নির্বাচিত পদ্ধতিগুলো পাশাপাশি পর্যালোচনা করুন; যে সারিগুলোয় পার্থক্য আছে সেগুলো চিহ্নিত করা হয়।
| শব্দ সঞ্চালন শ্রেণি× | ইম্পিডেন্স টিউব× | |
|---|---|---|
| ক্ষেত্র | শব্দবিজ্ঞান | শব্দবিজ্ঞান |
| পরিবার | Process / pipeline | Process / pipeline |
| উদ্ভবের বছর≠ | 1961 | 1866 |
| প্রবর্তক≠ | ASTM International | August Kundt |
| ধরন≠ | Building partition acoustic rating | Acoustic absorption measurement |
| মৌলিক উৎস≠ | ASTM E413-16 (2016). Classification for Rating Sound Insulation. American Society for Testing and Materials. link ↗ | 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 ↗ |
| অপর নাম≠ | STC, sound transmission loss, acoustic isolation | kundt tube, resonance tube, acoustic absorption, sound absorption coefficient |
| সম্পর্কিত | 5 | 5 |
| সারসংক্ষেপ≠ | Sound Transmission Class (STC) is a single-number rating used to describe how well building elements (walls, doors, windows) reduce sound transmission between adjacent spaces. Standardized by ASTM International and ISO, STC is calculated from sound transmission loss (STL) measurements across the speech frequency range (125 Hz–4 kHz). It is the primary metric used in building codes, product specifications, and acoustic design to ensure privacy, noise control, and occupant comfort. | 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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