{"id":950,"date":"2021-04-18T00:15:28","date_gmt":"2021-04-17T15:15:28","guid":{"rendered":"https:\/\/www.touryo.com\/oshiete\/?p=950"},"modified":"2024-02-20T15:14:51","modified_gmt":"2024-02-20T06:14:51","slug":"%e3%82%a2%e3%83%b3%e3%83%86%e3%83%8a%e8%a8%ad%e7%bd%ae%e5%b7%a5%e4%ba%8b%e6%99%82%e3%81%ab%e3%81%97%e3%81%a3%e3%81%a6%e3%81%8a%e3%81%8d%e3%81%9f%e3%81%84%e3%83%96%e3%83%bc%e3%82%b9%e3%82%bf%e3%83%bc","status":"publish","type":"post","link":"https:\/\/www.touryo.com\/oshiete\/950\/","title":{"rendered":"\u30a2\u30f3\u30c6\u30ca\u8a2d\u7f6e\u5de5\u4e8b\u6642\u306b\u3057\u3063\u3066\u304a\u304d\u305f\u3044\u30d6\u30fc\u30b9\u30bf\u30fc\u306e\u5f79\u5272\u300c\u96fb\u6ce2\u306e\u6e1b\u8870\u30fb\u640d\u5931\u300d\u306b\u3064\u3044\u3066"},"content":{"rendered":"

\u3053\u3093\u306b\u3061\u306f\u3002\u68df\u6881\u30c9\u30c3\u30c8\u30b3\u30e0 \u65bd\u5de5\u30c1\u30fc\u30e0\u306e\u51fa\u5cf6\u3067\u3059\u3002
\n\u4eca\u56de\u306f\u30a2\u30f3\u30c6\u30ca\u306e\u8a2d\u7f6e\u5de5\u4e8b\u6642\u306b\u3088\u304f\u805e\u304b\u308c\u308b\u300c\u30d6\u30fc\u30b9\u30bf\u30fc\u3063\u3066\u4f55\uff1f\u300d\u3001\u300c\u30d6\u30fc\u30b9\u30bf\u30fc\u3063\u3066\u5fc5\u8981\uff1f\u300d\u3068\u3044\u3046\u7591\u554f\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n

\u6e1b\u8870\u3068\u640d\u5931<\/p>\n

\u96fb\u6ce2\u306e\u5f37\u5ea6\u306f\u30b1\u30fc\u30d6\u30eb\u5185\u3084\u5206\u914d\u5668\u3084\u30c6\u30ec\u30d3\u7aef\u5b50\u306a\u3069\u306e\u6a5f\u5668\u3092\u901a\u904e\u3059\u308b\u969b\u3001\u5f31\u307e\u308b\u6027\u8cea\u3092\u6301\u3063\u3066\u3044\u307e\u3059\u3002<\/span>
\n<\/span>\u30b1\u30fc\u30d6\u30eb\u4f1d\u9001\u306b\u3088\u3063\u3066\u5f31\u307e\u308b\u3053\u3068\u3092\u6e1b\u8870\u3001\u6a5f\u5668\u901a\u904e\u306b\u3088\u3063\u3066\u5f31\u307e\u308b\u3053\u3068\u3092\u640d\u5931\u3068\u3044\u3044\u3001\u6570\u5024\u306f\u3068\u3082\u306b \u3010dB\u3011\u3067\u8868\u3057\u307e\u3059\u3002<\/span><\/p>\n

\u540c\u8ef8\u30b1\u30fc\u30d6\u30eb\u901a\u904e\u306b\u3088\u308b\u6e1b\u8870<\/p>\n

\u65b0\u7bc9\u306e\u5efa\u7269\u306f\u3001\u307b\u307c100\uff8a\uff9f\uff70\uff7e\uff9d\uff84\u3010S-5C-FB\u3011\u3068\u547c\u3070\u308c\u308b\u540c\u8ef8\u30b1\u30fc\u30d6\u30eb\u3092\u914d\u7dda\u3057\u3066\u3044\u307e\u3059\u3002<\/span>
\n<\/span>\u540c\u30b1\u30fc\u30d6\u30eb\u306e\u6e1b\u8870\u91cf\u306f\u4ee5\u4e0b\u306e\u6570\u5024\u3068\u306a\u308a\u307e\u3059\u3002<\/span>
\n<\/span>\u5468\u6ce2\u6570\u5e2f\u57df\u304c\u9ad8\u3044\u307b\u3069\u6e1b\u8870\u91cf\u304c\u5927\u304d\u304f\u306a\u308b\u6027\u8cea\u304c\u3042\u308b\u305f\u3081\u3001\u5730\u30c7\u30b8\u3088\u308a\u885b\u661f\u653e\u9001 (BS\/CS \u203b4K8K\u653e\u9001\u542b\u3080)\u306e\u65b9\u304c\u3088\u308a\u6e1b\u8870\u91cf\u304c\u5927\u304d\u304f\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/span><\/p>\n

\"\u540c\u8ef8\u30b1\u30fc\u30d6\u30eb<\/p>\n

\u30a2\u30f3\u30c6\u30ca\u304b\u3089\u5206\u914d\u5668\u307e\u3067\u914d\u7dda\u957715m\u3001\u5206\u914d\u5668\u304b\u3089\u30c6\u30ec\u30d3\u7aef\u5b50\u307e\u3067\u9577\u3044\u3068\u3053\u308d\u306715m\u3068\u3059\u308b\u3068\u3001\u5730\u4e0a\u30c7\u30b8\u30bf\u30eb\u653e\u9001\u3067 30m \u00d7 170 dB \/ 1,000m =  5.1dB \u306a\u3069\u3068\u306a\u308a\u307e\u3059\u3002<\/span><\/p>\n

\u5206\u914d\u5668\u306e\u901a\u904e\u640d\u5931<\/b><\/p>\n

\u5206\u914d\u5668\u306f\u3001\u30a2\u30f3\u30c6\u30ca\u304b\u3089\u306e\u96fb\u6ce2\u3092\u5404\u90e8\u5c4b\u306e\u30c6\u30ec\u30d3\u7aef\u5b50\u306b\u9001\u308b\u305f\u3081\u306e\u6a5f\u5668\u3067\u3059\u3002<\/span>
\n<\/span>2\u5206\u914d\uff5e8\u5206\u914d\u307e\u3067\u3042\u308a\u307e\u3059\u304c\u3001\u4e00\u822c\u5bb6\u5ead\u3067\u306f5\u5206\u914d\u304b6\u5206\u914d\u304c\u4e3b\u6d41\u3067\u3059\u3002<\/span>
\n<\/span>\u901a\u904e\u640d\u5931\u306f\u5206\u914d\u6570\u304c\u591a\u3044\u307b\u3069\u5927\u304d\u304f\u3001\u5468\u6ce2\u6570\u5e2f\u57df\u304c\u9ad8\u3044\u307b\u3069\u5927\u304d\u304f\u306a\u308a\u307e\u3059\u3002<\/span>
\n<\/span>\u5206\u914d\u640d\u5931\u306e\u6570\u5024\u306f\u4ee5\u4e0b\u3067\u3059\u3002<\/span><\/p>\n

\"\u5206\u914d\u5668\u306e\u5206\u914d\u640d\u5931\"<\/p>\n

\u300c\u3046\u3061\u3067\u306f2\u7b87\u6240\u3067\u3057\u304b\u30c6\u30ec\u30d3\u3092\u89b3\u306a\u3044\u306e\u3067\u3001\u30d6\u30fc\u30b9\u30bf\u30fc\u306f\u3044\u3089\u306a\u3044\u306e\u3067\u306f\uff1f\u300d\u3068\u4ef0\u308b\u304b\u305f\u304c\u3044\u3089\u3063\u3057\u3083\u3044\u307e\u3059\u304c\u3001\u30c6\u30ec\u30d3\u7aef\u5b50\u306e\u6570\u3067\u65e2\u306b\u5206\u914d\u3055\u308c\u3066\u3044\u308b\u305f\u3081\u3001\u30c6\u30ec\u30d3\u306e\u6570\u306f\u95a2\u4fc2\u3042\u308a\u307e\u305b\u3093\u3002<\/span><\/p>\n

\u30c6\u30ec\u30d3\u7aef\u5b50\u3067\u306e\u51fa\u529b\u5f37\u5ea6<\/b><\/p>\n

\u30c6\u30ec\u30d3\u7aef\u5b50\u3067\u3082\u308f\u305a\u304b\u3067\u3059\u304c(0.2\uff5e0.5dB\uff09\u640d\u5931 (\u633f\u5165\u640d\u5931)\u304c\u751f\u3058\u307e\u3059\u3002<\/span><\/p>\n

\u30c6\u30ec\u30d3\u7aef\u5b50\u3067\u306e\u51fa\u529b\u306e\u5f37\u5ea6\u3067\u3059\u304c\u3001\u63a8\u85a6\u5024\u306f\u5730\u30c7\u30b8\u306750\uff5e81dB\u3001\u885b\u661f\u653e\u9001\u306751\uff5e81dB\u3068\u8a00\u308f\u308c\u3066\u304a\u308a\u307e\u3059\u3002<\/span>
\n<\/span>\u68df\u6881\u30c9\u30c3\u30c8\u30b3\u30e0\u3067\u306f\u90e8\u5c4b\u5185\u3067\u306e\u5206\u914d\u3084\u8907\u6570\u63a5\u7d9a\u7b49\u3082\u8003\u616e\u306b\u5165\u308c\u3001\u3068\u3082\u306b65dB\uff5e80dB\u304f\u3089\u3044\u3092\u76ee\u5b89\u306b\u8abf\u6574\u3057\u3066\u304a\u308a\u307e\u3059\u3002<\/span><\/p>\n

\u30ec\u30d9\u30eb\u8a08\u7b97<\/b><\/p>\n

\"\u3010\u30ec\u30d9\u30eb\u8a08\u7b97\u4f8b\u3011<\/p>\n

\u30d6\u30fc\u30b9\u30bf\u30fc\u8a2d\u7f6e\u306a\u3057\u306e\u5834\u5408\u3001\u30c6\u30ec\u30d3\u7aef\u5b50\u3067\u306f\u5730\u30c7\u30b8\u306746.7dB\u3001BS\/CS\u306746.2dB\u3068\u306a\u3063\u3066\u3057\u307e\u3044\u307e\u3059\u3002
\n\u76ee\u5b89\u306e65\uff5e80dB\u306b\u3059\u308b\u306b\u306f\u3001\u6700\u4f4e\u3067\u3082\u5730\u30c7\u30b8\u306718.3dB\u3001BS\/CS\u306718.8dB\u5897\u5e45\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u5730\u30c7\u30b8\u8996\u8074\u5e0c\u671b\u30016\u5206\u914d\u5668\u304c\u8a2d\u7f6e\u3055\u308c\u3001\u914d\u7dda\u9577\u304c\u4e00\u7b87\u6240\u520630m\u306e\u5efa\u7269\u3067\u3001\u30c6\u30ec\u30d3\u7aef\u5b50\u306e\u51fa\u529b\u309265dB\u4ee5\u4e0a\u306b\u3059\u308b\u306b\u306f\u3001\u30d6\u30fc\u30b9\u30bf\u30fc\u3092\u4f7f\u7528\u3057\u306a\u3044\u5834\u5408\u3001\u30a2\u30f3\u30c6\u30ca\u3067\u6700\u4f4e\u3067\u308281.3dB\u306e\u5f37\u5ea6\u304c\u5fc5\u8981\u3068\u306a\u308a\u307e\u3059\uff0881.3  \u30fc  5.1  \u30fc  11.0  \u30fc  0.2   =  65 )\u3002<\/p>\n

\u5730\u30c7\u30b8\u7528\u30a2\u30f3\u30c6\u30ca\u3067\u3059\u304c\u3001\u6700\u8fd1\u306f\u516b\u6728\u30a2\u30f3\u30c6\u30ca\u3088\u308a\u5916\u89b3\u3092\u91cd\u8996\u3057\u305f\u30c7\u30b6\u30a4\u30f3\u30a2\u30f3\u30c6\u30ca\u304c\u597d\u307e\u308c\u3001\u6027\u80fd\u3082\u516b\u6728\u30a2\u30f3\u30c6\u30ca\u3068\u5927\u5dee\u3042\u308a\u307e\u305b\u3093\u3002
\n\u305f\u3060\u3057\u3001\u8a2d\u7f6e\u74b0\u5883\u306b\u304a\u3044\u3066\u516b\u6728\u30a2\u30f3\u30c6\u30ca\u306f\u9ad8\u3044\u7a7a\u9593\u306b\u8a2d\u7f6e\u3059\u308b\u306e\u306b\u5bfe\u3057\u3001\u30c7\u30b6\u30a4\u30f3\u30a2\u30f3\u30c6\u30ca\u306f\u58c1\u9762\u306a\u3069\u3067\u3001\u516b\u6728\u3068\u6bd4\u8f03\u3059\u308b\u3068\u4f4e\u304f\u306a\u308a\u3001\u65b9\u5411\u8abf\u6574\u7b49\u3082\u5341\u5206\u306b\u3067\u304d\u306a\u3044\u6b20\u70b9\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u8a2d\u7f6e\u74b0\u5883\u306e\u9055\u3044\u3067\u5f37\u5ea6\u306b\u6c7a\u5b9a\u7684\u306a\u5dee\u304c\u751f\u3058\u307e\u3059\u3002<\/p>\n

5\u5206\u914d\u30016\u5206\u914d\u5668\u306e\u304a\u5b85\u3067\u30c7\u30b6\u30a4\u30f3\u30a2\u30f3\u30c6\u30ca\u3092\u8a2d\u7f6e\u3059\u308b\u5834\u5408\u3001\u4f59\u7a0b\u306e\u5f37\u96fb\u754c\u5730\u57df\u3067\u306a\u3044\u9650\u308a\u30d6\u30fc\u30b9\u30bf\u30fc\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n

\u885b\u661f\u653e\u9001\u306e\u96fb\u6ce2\u306e\u5f37\u5ea6\u306f\u3001\u5730\u30c7\u30b8\u3068\u6027\u8cea\u304c\u7570\u306a\u308a\u96fb\u6ce2\u65b9\u5411\u306b\u7269\u7406\u7684\u969c\u5bb3\u7269\u304c\u306a\u3051\u308c\u3070\u5168\u56fd\u3069\u3053\u3067\u3082\u5927\u5dee\u306a\u304f\u3001\u30d1\u30e9\u30dc\u30e9\u30a2\u30f3\u30c6\u30ca\u306775dB\uff5e85dB\u7a0b\u5ea6\u3067\u3059\u3002
\n\u9ad8\u3044\u5468\u6ce2\u6570\u5e2f\u57df\u3067\u3001\u96fb\u6ce2\u304c\u3088\u308a\u5f31\u307e\u308a\u3084\u3059\u3044\u6027\u8cea\u304c\u3042\u308b\u305f\u3081\u30015\u5206\u914d\u30016\u5206\u914d\u306e\u304a\u5b85\u3067\u306f\u30d6\u30fc\u30b9\u30bf\u30fc\u8a2d\u7f6e\u306f\u5fc5\u9808\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n

\u30d6\u30fc\u30b9\u30bf\u30fc\u306e\u5f79\u5272<\/b><\/p>\n

\u53d7\u4fe1\u3059\u308b\u96fb\u6ce2\u306f\u3001\u6e2c\u5b9a\u5668\u3092\u7528\u3044\u305d\u306e\u5f37\u5ea6\u3068\u8cea (\u30af\u30aa\u30ea\u30c6\u30a3)\u306e2\u3064\u306e\u8ef8\u3067\u8a55\u4fa1\u3057\u307e\u3059\u3002<\/p>\n

\u5f37\u5ea6\u306f\u5358\u4f4d\u3010dB\u03bcV\/m\u3011\u3067\u8868\u3057\u3001\u30af\u30aa\u30ea\u30c6\u30a3\u30fc\u306fBER(\u30d3\u30c3\u30c8\u30fb\u30a8\u30e9\u30fc\u30fb\u30ec\u30a4\u30c8\uff09\u5024 \u3001MER(\u30e2\u30b8\u30e5\u30ec\u30fc\u30b7\u30e7\u30f3\u30fb\u30a8\u30e9\u30fc\u30fb\u30ec\u30b7\u30aa)\u5024\u3067\u305d\u308c\u305e\u308c\u78ba\u8a8d\u3057\u307e\u3059\u3002
\n\u6700\u5927\u306e\u5f37\u5ea6\u3092\u5f97\u3089\u308c\u308b\u65b9\u5411\u3001\u9ad8\u3055\u3092\u30a2\u30f3\u30c6\u30ca\u3067\u78ba\u8a8d\u3057\u3001\u4f75\u305b\u3066BER\u5024\u3001MER\u5024\u306b\u554f\u984c\u304c\u306a\u3044\u304b\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/p>\n

\u30d6\u30fc\u30b9\u30bf\u30fc\u306f\u30012\u3064\u306e\u8a55\u4fa1\u8ef8\u306e\u3046\u3061\u5f37\u5ea6\u306e\u78ba\u4fdd\u306e\u305f\u3081\u306b\u4f7f\u7528\u3059\u308b\u6a5f\u5668\u3067\u3059\u3002<\/p>\n

\u4e00\u822c\u7684\u306b\u96fb\u6ce2\u3092\u5f37\u3081\u308b\u6a5f\u5668\u3068\u8a8d\u8b58\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u9593\u9055\u3044\u3067\u306f\u306a\u3044\u306e\u3067\u3059\u304c\u3001\u5b9f\u969b\u306f\u96fb\u6ce2\u306e\u6e1b\u8870\u3084\u640d\u5931\u3092\u88dc\u3046\u305f\u3081\u306e\u6a5f\u5668\u3068\u3044\u3046\u306e\u304c\u9069\u5207\u306a\u8868\u73fe\u304b\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n

\u30a2\u30f3\u30c6\u30ca\u3067\u53d7\u4fe1\u3057\u305f\u96fb\u6ce2\u306f\u540c\u8ef8\u30b1\u30fc\u30d6\u30eb\u3001\u5206\u914d\u5668\u306a\u3069\u3092\u901a\u904e\u3059\u308b\u3054\u3068\u306b\u5f31\u307e\u3063\u3066\u3057\u307e\u3044\u307e\u3059\u3002\u30c6\u30ec\u30d3\u306b\u63a5\u7d9a\u3059\u308b\u307e\u3067\u306b\u3001\u6570\u5024\u304c\u5f31\u307e\u308a\u8996\u8074\u3067\u304d\u306a\u304f\u306a\u308b\u3053\u3068\u3092\u9632\u3050\u305f\u3081\u306b\u30d6\u30fc\u30b9\u30bf\u30fc\u3092\u8a2d\u7f6e\u3059\u308b\u308f\u3051\u3067\u3059\u3002\u30d6\u30fc\u30b9\u30bf\u30fc\u306f\u5897\u5e45\u3059\u308b\u3060\u3051\u3067\u306f\u306a\u304f\u3001\u7406\u60f3\u306e\u5f37\u5ea6\u306b\u8abf\u6574\u3059\u308b\u305f\u3081\u306e\u5165\u529b\u30a2\u30c3\u30c6\u30cd\u30fc\u30bf\u30fc\u3084\u5229\u5f97\u8abf\u6574\u306e\u6a5f\u80fd\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u68df\u6881\u30c9\u30c3\u30c8\u30b3\u30e0\u306e\u30a2\u30f3\u30c6\u30ca\u5de5\u4e8b\u3078<\/span><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

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