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Calculation of the first resonant frequency and the first resonant factor of a sound absorption of material МR
- Authors: 1 11, 1 11, 1 12, 1 12
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Affiliations:
- Samara State Aerospace University
- Kharbin Polytechnic University
- Issue: Vol 8, No 3-2 (2009): Special Issue
- Pages: 268-273
- Section: AIRCRAFT AND SPACE ROCKET ENGINEERING
- URL: https://journals.ssau.ru/vestnik/article/view/769
- DOI: https://doi.org/10.18287/2541-7533-2009-0-3-2(19)-268-273
- ID: 769
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Abstract
It is possible to express sound-proof property of material МR (MR) by the first resonant frequency (FRF) and by the first resonant factor of a sound absorption аg. In work the equation of calculation of the FRF of МR in function of cos, from which the graphic way receives the FRF is received. After comparison of values of the FRF treated as a result of the decision of the formula with values, received by a method of long lines, it is drawn a conclusion on greater accuracy of new method. Considering influence of attenuation of a resonance of pores, for coth yh the amendment is made. As a result of the decision of two equations are received the first resonant factor of a sound absorption аg. After comparison with the measured values аg, it is drawn a conclusion on accuracy of calculation information.
About the authors
1 1
Samara State Aerospace University
Author for correspondence.
Email: sadohina@ssau.ru
Russian Federation
1 1
Samara State Aerospace University
Email: sadohina@ssau.ru
Russian Federation
1 1
Kharbin Polytechnic University
Email: sadohina@ssau.ru
Russian Federation
1 1
Kharbin Polytechnic University
Email: sadohina@ssau.ru
Russian Federation
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