NOISE CONTROL APPARATUS
A noise control apparatus for reducing a sound volume of a noise propagating from a noise source such as a railroad includes a sound arresting wall placed apart from the noise source. Means for shifting in phase and refracting the acoustic wave of the noise is disposed at substantially the top of th...
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| creator | IIDA KAZUYOSHI YAMAMOTO TSUYOSHI KONDOU KIICHI TANIGUCHI NORIHISA |
| description | A noise control apparatus for reducing a sound volume of a noise propagating from a noise source such as a railroad includes a sound arresting wall placed apart from the noise source. Means for shifting in phase and refracting the acoustic wave of the noise is disposed at substantially the top of the noise arresting wall. The above means, for example, has a plurality of passageways extending substantially along the propagating direction of the acoustic wave of the noise and the length of the passageways varies. Through the above means, a part of the acoustic wave from the noise source is refracted and the phase thereof is shifted to be a refracted propagating sound, which thereafter interferes with the other part of the acoustic wave directly from the noise source to thereby reduce a sound volume to a great extent. |
| format | Patent |
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Means for shifting in phase and refracting the acoustic wave of the noise is disposed at substantially the top of the noise arresting wall. The above means, for example, has a plurality of passageways extending substantially along the propagating direction of the acoustic wave of the noise and the length of the passageways varies. Through the above means, a part of the acoustic wave from the noise source is refracted and the phase thereof is shifted to be a refracted propagating sound, which thereafter interferes with the other part of the acoustic wave directly from the noise source to thereby reduce a sound volume to a great extent.</description><language>eng</language><subject>ACOUSTICS ; ACOUSTICS NOT OTHERWISE PROVIDED FOR ; ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTIONOF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, ORTHE LIKE ; BUILDING ; CEILINGS ; CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES ; FIXED CONSTRUCTIONS ; FLOORS ; GENERAL BUILDING CONSTRUCTIONS ; INSULATION OR OTHER PROTECTION OF BUILDINGS ; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING,NOISE OR OTHER ACOUSTIC WAVES IN GENERAL ; MUSICAL INSTRUMENTS ; PHYSICS ; ROOFS ; SOUND-PRODUCING DEVICES ; WALLS, e.g. PARTITIONS</subject><creationdate>1982</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=19820721&DB=EPODOC&CC=JP&NR=S57116812A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76289</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19820721&DB=EPODOC&CC=JP&NR=S57116812A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>IIDA KAZUYOSHI</creatorcontrib><creatorcontrib>YAMAMOTO TSUYOSHI</creatorcontrib><creatorcontrib>KONDOU KIICHI</creatorcontrib><creatorcontrib>TANIGUCHI NORIHISA</creatorcontrib><title>NOISE CONTROL APPARATUS</title><description>A noise control apparatus for reducing a sound volume of a noise propagating from a noise source such as a railroad includes a sound arresting wall placed apart from the noise source. Means for shifting in phase and refracting the acoustic wave of the noise is disposed at substantially the top of the noise arresting wall. The above means, for example, has a plurality of passageways extending substantially along the propagating direction of the acoustic wave of the noise and the length of the passageways varies. Through the above means, a part of the acoustic wave from the noise source is refracted and the phase thereof is shifted to be a refracted propagating sound, which thereafter interferes with the other part of the acoustic wave directly from the noise source to thereby reduce a sound volume to a great extent.</description><subject>ACOUSTICS</subject><subject>ACOUSTICS NOT OTHERWISE PROVIDED FOR</subject><subject>ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTIONOF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, ORTHE LIKE</subject><subject>BUILDING</subject><subject>CEILINGS</subject><subject>CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES</subject><subject>FIXED CONSTRUCTIONS</subject><subject>FLOORS</subject><subject>GENERAL BUILDING CONSTRUCTIONS</subject><subject>INSULATION OR OTHER PROTECTION OF BUILDINGS</subject><subject>METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING,NOISE OR OTHER ACOUSTIC WAVES IN GENERAL</subject><subject>MUSICAL INSTRUMENTS</subject><subject>PHYSICS</subject><subject>ROOFS</subject><subject>SOUND-PRODUCING DEVICES</subject><subject>WALLS, e.g. PARTITIONS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1982</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZBD38_cMdlVw9vcLCfL3UXAMCHAMcgwJDeZhYE1LzClO5YXS3AyKbq4hzh66qQX58anFBYnJqXmpJfFeAcGm5oaGZhaGRo7GxKgBAOrdH-Q</recordid><startdate>19820721</startdate><enddate>19820721</enddate><creator>IIDA KAZUYOSHI</creator><creator>YAMAMOTO TSUYOSHI</creator><creator>KONDOU KIICHI</creator><creator>TANIGUCHI NORIHISA</creator><scope>EVB</scope></search><sort><creationdate>19820721</creationdate><title>NOISE CONTROL APPARATUS</title><author>IIDA KAZUYOSHI ; YAMAMOTO TSUYOSHI ; KONDOU KIICHI ; TANIGUCHI NORIHISA</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_JPS57116812A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>1982</creationdate><topic>ACOUSTICS</topic><topic>ACOUSTICS NOT OTHERWISE PROVIDED FOR</topic><topic>ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTIONOF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, ORTHE LIKE</topic><topic>BUILDING</topic><topic>CEILINGS</topic><topic>CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES</topic><topic>FIXED CONSTRUCTIONS</topic><topic>FLOORS</topic><topic>GENERAL BUILDING CONSTRUCTIONS</topic><topic>INSULATION OR OTHER PROTECTION OF BUILDINGS</topic><topic>METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING,NOISE OR OTHER ACOUSTIC WAVES IN GENERAL</topic><topic>MUSICAL INSTRUMENTS</topic><topic>PHYSICS</topic><topic>ROOFS</topic><topic>SOUND-PRODUCING DEVICES</topic><topic>WALLS, e.g. PARTITIONS</topic><toplevel>online_resources</toplevel><creatorcontrib>IIDA KAZUYOSHI</creatorcontrib><creatorcontrib>YAMAMOTO TSUYOSHI</creatorcontrib><creatorcontrib>KONDOU KIICHI</creatorcontrib><creatorcontrib>TANIGUCHI NORIHISA</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>IIDA KAZUYOSHI</au><au>YAMAMOTO TSUYOSHI</au><au>KONDOU KIICHI</au><au>TANIGUCHI NORIHISA</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>NOISE CONTROL APPARATUS</title><date>1982-07-21</date><risdate>1982</risdate><abstract>A noise control apparatus for reducing a sound volume of a noise propagating from a noise source such as a railroad includes a sound arresting wall placed apart from the noise source. Means for shifting in phase and refracting the acoustic wave of the noise is disposed at substantially the top of the noise arresting wall. The above means, for example, has a plurality of passageways extending substantially along the propagating direction of the acoustic wave of the noise and the length of the passageways varies. Through the above means, a part of the acoustic wave from the noise source is refracted and the phase thereof is shifted to be a refracted propagating sound, which thereafter interferes with the other part of the acoustic wave directly from the noise source to thereby reduce a sound volume to a great extent.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | ACOUSTICS ACOUSTICS NOT OTHERWISE PROVIDED FOR ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTIONOF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, ORTHE LIKE BUILDING CEILINGS CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES FIXED CONSTRUCTIONS FLOORS GENERAL BUILDING CONSTRUCTIONS INSULATION OR OTHER PROTECTION OF BUILDINGS METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING,NOISE OR OTHER ACOUSTIC WAVES IN GENERAL MUSICAL INSTRUMENTS PHYSICS ROOFS SOUND-PRODUCING DEVICES WALLS, e.g. PARTITIONS |
| title | NOISE CONTROL APPARATUS |
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