FIELD: physics.
SUBSTANCE: method of estimating sound absorption of porous fibrous materials includes measuring specific resistance to the flow of an air stream RS and determining the sound absorption coefficient α at a given frequency from regression equations which link RS and α. The invention can be used to estimate the sound absorption coefficient of porous fibrous materials, as well as porous materials with an open pore system.
EFFECT: high accuracy of estimation.
23 dwg, 3 tbl
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| Sound-absorbing layered structure | 2017 |
|
RU2754697C2 |
| SOUND-ABSORBING COMPOSITE MATERIAL | 2014 |
|
RU2575102C1 |
| LOW-NOISE TECHNICAL ROOM | 2019 |
|
RU2716043C1 |
| LOW-NOISE TECHNICAL ROOM | 2019 |
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RU2715727C1 |
| LOW-NOISE TECHNICAL ROOM | 2017 |
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RU2684942C1 |
| METHOD FOR PRODUCING LAMINAR SOUND-ABSORBING COMPOSITE MATERIALS | 2015 |
|
RU2604839C2 |
| LOW-NOISE TECHNICAL ROOM | 2017 |
|
RU2677621C1 |
| NOISE-ABSORBING COAT FOR AIR DUCTS OF VEHICLE PASSENGER COMPARTMENT (DRIVER CABIN) HEAT-AND-VENT SYSTEM (HVS) | 2010 |
|
RU2456173C2 |
| CRANKSHAFT PULLEY FOR DRIVING AUXILIARY UNITS OF PISTON MACHINE | 2016 |
|
RU2647781C2 |
| TRANSPORT FACILITY | 2010 |
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RU2438911C2 |
