FIELD: ventilation.
SUBSTANCE: ventilation pump comprises diaphragm pump, soundproofing chamber, and soundproofing inlet and outlet valves. According to the second version, the valve spaces are made of sound-absorbing chambers. According to the third version, the soundproofing check valves automatically shutoff the outer air duct when the signal from the external microphone exceeds a permissible level.
EFFECT: reduced noisiness.
30 cl
| Title | Year | Author | Number |
|---|---|---|---|
| NOISE-PROTECTIVE STRUCTURE | 2005 |
|
RU2275476C1 |
| CANOPY FOR SLEEPING | 2003 |
|
RU2249423C1 |
| NOISE-PROTECTIVE VENTILATION DEVICE | 0 |
|
SU1796750A1 |
| WALL PANEL WITH VENTILATING DEVICE | 0 |
|
SU1569398A1 |
| TECHNOLOGICAL SYSTEM FOR SUPPRESSING AERO-GAS-DYNAMIC NOISE OF FORCED SUCK-OUT OF EXHAUST GASES OF TEST SUBJECTS LIKE WHEELED VEHICLES EQUIPPED WITH INTERNAL COMBUSTION ENGINES, OR AUTONOMOUS INTERNAL COMBUSTION ENGINES OF TESTING ACOUSTIC COMPLEX | 2004 |
|
RU2270989C1 |
| TECHNOLOGICAL SYSTEM FOR SUPPRESSING AERO-GAS-DYNAMIC NOISE OF FORCED SUCK-OUT OF EXHAUST GASES OF TEST SUBJECTS LIKE WHEELED VEHICLES EQUIPPED WITH INTERNAL COMBUSTION ENGINES, OR AUTONOMOUS INTERNAL COMBUSTION ENGINES OF TESTING ACOUSTIC COMPLEX | 2004 |
|
RU2270987C1 |
| NOISE-PROOF VENTILATION WINDOW | 0 |
|
SU1770540A2 |
| TECHNOLOGICAL SYSTEM FOR SUPPRESSING AERO-GAS-DYNAMIC NOISE OF FORCED SUCK-OUT OF EXHAUST GASES OF TEST SUBJECTS LIKE WHEELED VEHICLES EQUIPPED WITH INTERNAL COMBUSTION ENGINES, OR AUTONOMOUS INTERNAL COMBUSTION ENGINES OF TESTING ACOUSTIC COMPLEX | 2004 |
|
RU2270988C1 |
| INPUT-OUTLET VENTILATION DEVICE WITH HEAT RECOVERY | 2018 |
|
RU2732179C2 |
| WELDING SET | 0 |
|
SU1760142A1 |
