NOISE SUPPRESSION SYSTEM
PROBLEM TO BE SOLVED: To provide a noise suppression system capable of surely obtaining noise suppression effect by specifying an installation position of a noise suppressor.SOLUTION: A noise suppression system includes: a duct line having openings at both ends and connected to a noise source at the...
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| creator | FUJIHASHI KATSUMI YAMADA TETSUYA |
| description | PROBLEM TO BE SOLVED: To provide a noise suppression system capable of surely obtaining noise suppression effect by specifying an installation position of a noise suppressor.SOLUTION: A noise suppression system includes: a duct line having openings at both ends and connected to a noise source at the first opening out of the openings; and a tubular noise suppressor disposed while projecting radial outward, on a wall surface of the duct at a position separating to the second opening side, from the first opening of the duct line, communicated with the duct line, at an end portion on the wall surface side, of the tubular noise suppressor, and closed at the another end portion. When a wavelength of noise generated from the noise source is denoted by λ, a length of the noise suppressor is set to be λ/4, and a length from the first opening of the duct line to a joining position of the noise suppressor, and a length from the second opening of the duct line to the joining position of the noise suppressor are set to be (2n+1)λ/4 (n is a natural number including 0 and may be equal or different in both lengths). |
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When a wavelength of noise generated from the noise source is denoted by λ, a length of the noise suppressor is set to be λ/4, and a length from the first opening of the duct line to a joining position of the noise suppressor, and a length from the second opening of the duct line to the joining position of the noise suppressor are set to be (2n+1)λ/4 (n is a natural number including 0 and may be equal or different in both lengths).</description><language>eng</language><subject>AIR-CONDITIONING, AIR-HUMIDIFICATION, VENTILATION, USE OF AIRCURRENTS FOR SCREENING ; BLASTING ; ENGINE PLANTS IN GENERAL ; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES ; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL ; HEATING ; LIGHTING ; MACHINES OR ENGINES IN GENERAL ; MECHANICAL ENGINEERING ; RANGES ; STEAM ENGINES ; VENTILATING ; WEAPONS</subject><creationdate>2014</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20140605&DB=EPODOC&CC=JP&NR=2014101757A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25543,76294</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20140605&DB=EPODOC&CC=JP&NR=2014101757A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>FUJIHASHI KATSUMI</creatorcontrib><creatorcontrib>YAMADA TETSUYA</creatorcontrib><title>NOISE SUPPRESSION SYSTEM</title><description>PROBLEM TO BE SOLVED: To provide a noise suppression system capable of surely obtaining noise suppression effect by specifying an installation position of a noise suppressor.SOLUTION: A noise suppression system includes: a duct line having openings at both ends and connected to a noise source at the first opening out of the openings; and a tubular noise suppressor disposed while projecting radial outward, on a wall surface of the duct at a position separating to the second opening side, from the first opening of the duct line, communicated with the duct line, at an end portion on the wall surface side, of the tubular noise suppressor, and closed at the another end portion. 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When a wavelength of noise generated from the noise source is denoted by λ, a length of the noise suppressor is set to be λ/4, and a length from the first opening of the duct line to a joining position of the noise suppressor, and a length from the second opening of the duct line to the joining position of the noise suppressor are set to be (2n+1)λ/4 (n is a natural number including 0 and may be equal or different in both lengths).</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | AIR-CONDITIONING, AIR-HUMIDIFICATION, VENTILATION, USE OF AIRCURRENTS FOR SCREENING BLASTING ENGINE PLANTS IN GENERAL GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL HEATING LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING RANGES STEAM ENGINES VENTILATING WEAPONS |
| title | NOISE SUPPRESSION SYSTEM |
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