{"id":2797,"date":"2025-04-18T12:39:51","date_gmt":"2025-04-18T04:39:51","guid":{"rendered":"https:\/\/ecmicrophones.com\/?p=2797"},"modified":"2026-01-28T08:53:14","modified_gmt":"2026-01-28T00:53:14","slug":"key-specs-of-built-in-amplifier-circuits-in-microphones","status":"publish","type":"post","link":"https:\/\/ecmicrophones.com\/ja\/key-specs-of-built-in-amplifier-circuits-in-microphones\/","title":{"rendered":"\u30de\u30a4\u30af\u30ed\u30db\u30f3\u5185\u8535\u30a2\u30f3\u30d7\u56de\u8def\u306e\u4e3b\u306a\u4ed5\u69d8"},"content":{"rendered":"<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"925\" height=\"540\" src=\"https:\/\/ecmicrophones.com\/wp-content\/uploads\/2025\/04\/Key-Specs-of-Built-in-Amplifier-Circuits-in-Microphones.png\" alt=\"\u30de\u30a4\u30af\u30ed\u30db\u30f3\u5185\u8535\u30a2\u30f3\u30d7\u56de\u8def\u306e\u4e3b\u306a\u4ed5\u69d8\" class=\"wp-image-2802\" srcset=\"https:\/\/ecmicrophones.com\/wp-content\/uploads\/2025\/04\/Key-Specs-of-Built-in-Amplifier-Circuits-in-Microphones.png 925w, https:\/\/ecmicrophones.com\/wp-content\/uploads\/2025\/04\/Key-Specs-of-Built-in-Amplifier-Circuits-in-Microphones-300x175.png 300w, https:\/\/ecmicrophones.com\/wp-content\/uploads\/2025\/04\/Key-Specs-of-Built-in-Amplifier-Circuits-in-Microphones-768x448.png 768w, https:\/\/ecmicrophones.com\/wp-content\/uploads\/2025\/04\/Key-Specs-of-Built-in-Amplifier-Circuits-in-Microphones-18x12.png 18w, https:\/\/ecmicrophones.com\/wp-content\/uploads\/2025\/04\/Key-Specs-of-Built-in-Amplifier-Circuits-in-Microphones-600x350.png 600w\" sizes=\"auto, (max-width: 925px) 100vw, 925px\" \/><figcaption class=\"wp-element-caption\">\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306e\u5185\u8535\u30a2\u30f3\u30d7\u56de\u8def<\/figcaption><\/figure>\n<\/div>\n\n\n<p>\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306e\u8a2d\u8a08\u3084\u30aa\u30fc\u30c7\u30a3\u30aa\u6a5f\u5668\u306e\u90e8\u54c1\u9078\u5b9a\u306b\u304a\u3044\u3066\u3001\u5185\u8535\u30a2\u30f3\u30d7\u56de\u8def\u306e\u5f79\u5272\u306f\u904e\u8a00\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u3053\u308c\u3089\u306e\u30a2\u30f3\u30d7\u56de\u8def\u306e\u91cd\u8981\u306a\u30d1\u30e9\u30e1\u30fc\u30bf\u30fc\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u306f\u3001\u6700\u9ad8\u306e\u30aa\u30fc\u30c7\u30a3\u30aa\u6027\u80fd\u3092\u9054\u6210\u3059\u308b\u305f\u3081\u306b\u4e0d\u53ef\u6b20\u3067\u3059\u3002\u3053\u306e\u30ac\u30a4\u30c9\u3067\u306f\u3001\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306e\u30a2\u30f3\u30d7\u56de\u8def\u306e\u91cd\u8981\u306a\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u5206\u89e3\u3057\u307e\u3059\u3002&nbsp;<strong>\u30b2\u30a4\u30f3<\/strong>,&nbsp;<strong>\u30ce\u30a4\u30ba\u30d5\u30ed\u30a2<\/strong>,&nbsp;<strong>THD<\/strong>&nbsp;(\u5168\u9ad8\u8abf\u6ce2\u6b6a\u307f\uff09\u3001\u304a\u3088\u3073&nbsp;<strong>\u5165\u529b\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9<\/strong>\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306e\u8a2d\u8a08\u306b\u3064\u3044\u3066\u5341\u5206\u306a\u60c5\u5831\u3092\u5f97\u305f\u4e0a\u3067\u6c7a\u5b9a\u3059\u308b\u306e\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">1.\u30b2\u30a4\u30f3\u5897\u5e45\u30d1\u30ef\u30fc\u3092\u7406\u89e3\u3059\u308b<\/h2>\n\n\n\n<p><strong>\u30b2\u30a4\u30f3<\/strong>&nbsp;\u306f\u3001\u5185\u8535\u30a2\u30f3\u30d7\u56de\u8def\u306e\u6700\u3082\u91cd\u8981\u306a\u30d1\u30e9\u30e1\u30fc\u30bf\u30fc\u306e\u3072\u3068\u3064\u3067\u3042\u308b\u3002\u30de\u30a4\u30af\u4fe1\u53f7\u304c\u3069\u308c\u3060\u3051\u5897\u5e45\u3055\u308c\u308b\u304b\u3092\u6c7a\u5b9a\u3057\u307e\u3059\u3002\u30b2\u30a4\u30f3\u304c\u9ad8\u3051\u308c\u3070\u9ad8\u3044\u307b\u3069\u3001\u4fe1\u53f7\u306f\u3088\u308a\u30d1\u30ef\u30d5\u30eb\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u4e00\u822c\u7684\u306a\u30b2\u30a4\u30f3\u5024\u306e\u7bc4\u56f2\u306f&nbsp;<strong>+20dB\uff5e+60dB<\/strong>\u30af\u30ea\u30a2\u3067\u8074\u304d\u3084\u3059\u3044\u30b5\u30a6\u30f3\u30c9\u3092\u78ba\u4fdd\u3059\u308b\u306b\u306f\u3001\u9069\u5207\u306a\u30b2\u30a4\u30f3\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u304c\u4e0d\u53ef\u6b20\u3067\u3059\u3002\u4f8b\u3048\u3070<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30c0\u30a4\u30ca\u30df\u30c3\u30af\u30fb\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306f\u901a\u5e38\u3001\u4ee5\u4e0b\u306e\u30b2\u30a4\u30f3\u3092\u5fc5\u8981\u3068\u3059\u308b\u3002&nbsp;<strong>+25dB\u4ee5\u4e0a<\/strong>&nbsp;\u4fe1\u53f7\u3092\u5341\u5206\u306b\u5897\u5e45\u3059\u308b\u3002<\/li>\n\n\n\n<li>\u30b3\u30f3\u30c7\u30f3\u30b5\u30fc\u30fb\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306f\u3088\u308a\u5c11\u306a\u3044\u30b2\u30a4\u30f3\u3092\u5fc5\u8981\u3068\u3057\u3001\u4e00\u822c\u7684\u306b\u306f\u4ee5\u4e0b\u306e\u7bc4\u56f2\u3067\u3059\u3002&nbsp;<strong>+10dB\uff5e+30dB<\/strong>.<\/li>\n<\/ul>\n\n\n\n<p><strong>\u30d2\u30f3\u30c8<\/strong>&nbsp;\u30b2\u30a4\u30f3\u304c\u9ad8\u3059\u304e\u308b\u3068\u30ce\u30a4\u30ba\u304c\u6df7\u5165\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u5341\u5206\u306a\u4fe1\u53f7\u5f37\u5ea6\u3092\u78ba\u4fdd\u3057\u3064\u3064\u3001\u6b6a\u307f\u3092\u907f\u3051\u308b\u305f\u3081\u306b\u5897\u5e45\u306e\u30d0\u30e9\u30f3\u30b9\u3092\u3068\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">2.\u30ce\u30a4\u30ba\u30d5\u30ed\u30a2\u30af\u30ea\u30fc\u30f3\u306a\u30b5\u30a6\u30f3\u30c9\u306e\u78ba\u4fdd<\/h2>\n\n\n\n<p><strong>\u30ce\u30a4\u30ba\u30d5\u30ed\u30a2<\/strong>&nbsp;\u3068\u306f\u3001\u30a2\u30f3\u30d7\u81ea\u4f53\u304b\u3089\u767a\u751f\u3059\u308b\u30d0\u30c3\u30af\u30b0\u30e9\u30a6\u30f3\u30c9\u30fb\u30ce\u30a4\u30ba\u30fb\u30ec\u30d9\u30eb\u306e\u3053\u3068\u3067\u3059\u3002\u30ce\u30a4\u30ba\u30d5\u30ed\u30a2\u304c\u4f4e\u3044\u307b\u3069\u3001\u3088\u308a\u30af\u30ea\u30fc\u30f3\u3067\u30d7\u30ed\u30d5\u30a7\u30c3\u30b7\u30e7\u30ca\u30eb\u306a\u97f3\u8cea\u3092\u610f\u5473\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u5178\u578b\u7684\u306a\u30ce\u30a4\u30ba\u30d5\u30ed\u30a2\u306e\u5024\u306f\u4ee5\u4e0b\u306e\u7bc4\u56f2\u3067\u3042\u308b\u3002&nbsp;<strong>-90dBu\uff5e-130dBu<\/strong>\u9ad8\u97f3\u8cea\u9332\u97f3\u306b\u306f\u4f4e\u3044\u5024\u306e\u65b9\u304c\u826f\u3044\u3002\u4f8b\u3048\u3070<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u306e\u30ce\u30a4\u30ba\u30d5\u30ed\u30a2&nbsp;<strong>-100dBu\u4ee5\u4e0b<\/strong>&nbsp;\u306f\u3001\u30d0\u30c3\u30af\u30b0\u30e9\u30a6\u30f3\u30c9\u30fb\u30ce\u30a4\u30ba\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u308b\u3053\u3068\u304c\u4e0d\u53ef\u6b20\u306a\u30d7\u30ed\u30d5\u30a7\u30c3\u30b7\u30e7\u30ca\u30eb\u306a\u30ec\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u74b0\u5883\u306b\u6700\u9069\u3067\u3059\u3002<\/li>\n\n\n\n<li>\u306e\u30ce\u30a4\u30ba\u30d5\u30ed\u30a2&nbsp;<strong>-90dBu<\/strong>&nbsp;\u306f\u3001\u9759\u304b\u306a\u74b0\u5883\u3067\u306e\u5165\u9580\u30ec\u30d9\u30eb\u306e\u30de\u30a4\u30af\u3068\u3057\u3066\u306f\u8a31\u5bb9\u7bc4\u56f2\u3067\u3042\u308b\u3002<\/li>\n<\/ul>\n\n\n\n<p><strong>\u8b66\u544a\u3060\uff1a<\/strong>&nbsp;\u5b89\u4fa1\u306a\u30a2\u30f3\u30d7\u306e\u4e2d\u306b\u306f\u3001\u9ad8\u5229\u5f97\u3092\u3046\u305f\u3063\u3066\u3044\u3066\u3082\u30ce\u30a4\u30ba\u304c\u5927\u304d\u304f\u3001\u30ec\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u3067\u4e0d\u8981\u306a\u30d2\u30b9\u3084\u30cf\u30e0\u30ce\u30a4\u30ba\u304c\u767a\u751f\u3059\u308b\u3082\u306e\u3082\u3042\u308b\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">3.THD\uff1a\u30aa\u30fc\u30c7\u30a3\u30aa\u54c1\u8cea\u3078\u306e\u5f71\u97ff<\/h2>\n\n\n\n<p><strong>THD (\u5168\u9ad8\u8abf\u6ce2\u6b6a\u307f)<\/strong>&nbsp;\u30a2\u30f3\u30d7\u306b\u3088\u3063\u3066\u539f\u97f3\u4fe1\u53f7\u304c\u3069\u306e\u7a0b\u5ea6\u5909\u5316\u3059\u308b\u304b\u3092\u6e2c\u5b9a\u3059\u308b\u3002THD\u304c\u4f4e\u3044\u307b\u3069\u3001\u4fe1\u53f7\u304c\u3088\u308a\u6b63\u78ba\u306b\u4fdd\u5b58\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u3092\u610f\u5473\u3059\u308b\u3002<\/p>\n\n\n\n<p>\u4e00\u822c\u7684\u306aTHD\u5024\u306e\u7bc4\u56f2\u306f&nbsp;<strong>0.001%<\/strong>&nbsp;(\u9ad8\u7d1a\u54c1\uff09\u304b\u3089&nbsp;<strong>0.1%<\/strong>&nbsp;(\u30a8\u30f3\u30c8\u30ea\u30fc\u30ec\u30d9\u30eb\uff09\u3002\u3042\u306a\u305f\u306e\u30cb\u30fc\u30ba\u306b\u5408\u308f\u305b\u305f\u9078\u3073\u65b9\u3092\u3054\u7d39\u4ecb\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u97f3\u58f0\u9332\u97f3\u3084\u30dd\u30c3\u30c9\u30ad\u30e3\u30b9\u30c8\u306e\u3088\u3046\u306a\u9ad8\u5fe0\u5b9f\u5ea6\u3092\u5fc5\u8981\u3068\u3059\u308b\u9332\u97f3\u7528\u9014\u3067\u306f\u3001THD\u306f&nbsp;<strong>&lt;0.01%<\/strong>&nbsp;\u30af\u30ea\u30fc\u30f3\u3067\u30ca\u30c1\u30e5\u30e9\u30eb\u306a\u30b5\u30a6\u30f3\u30c9\u3092\u5f97\u308b\u306b\u306f\u3001\u300cSOUL\u300d\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\u3002<\/li>\n\n\n\n<li>\u97f3\u697d\u5236\u4f5c\u306e\u5834\u5408\u3001\u5c11\u3057\u9ad8\u3081\u306eTHD\u3092\u597d\u3080\u4eba\u3082\u3044\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002&nbsp;<strong>0.1%<\/strong>)\u3092\u4f7f\u3063\u3066\u3001\u97f3\u306b\u6696\u304b\u307f\u3084\u500b\u6027\u3092\u52a0\u3048\u308b\u3002<\/li>\n<\/ul>\n\n\n\n<p><strong>\u30d2\u30f3\u30c8<\/strong>&nbsp;\u4e00\u822c\u7684\u306bTHD\u306f\u4f4e\u3044\u65b9\u304c\u826f\u3044\u304c\u3001\u97f3\u697d\u3084\u30af\u30ea\u30a8\u30a4\u30c6\u30a3\u30d6\u306a\u30b5\u30a6\u30f3\u30c9\u30c7\u30b6\u30a4\u30f3\u306a\u3069\u7279\u5b9a\u306e\u7528\u9014\u3067\u306f\u3001\u3042\u308b\u7a0b\u5ea6\u306e\u6b6a\u307f\u304c\u3042\u3063\u305f\u65b9\u304c\u671b\u307e\u3057\u3044\u5834\u5408\u3082\u3042\u308b\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">4.\u5165\u529b\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\uff1a\u30de\u30a4\u30af\u3068\u306e\u30de\u30c3\u30c1\u30f3\u30b0<\/h2>\n\n\n\n<p><strong>\u5165\u529b\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9<\/strong>&nbsp;\u3068\u306f\u3001\u30a2\u30f3\u30d7\u3068\u30de\u30a4\u30af\u30ed\u30db\u30f3\u7d20\u5b50\u306e\u9593\u306e\u4e92\u63db\u6027\u306e\u3053\u3068\u3067\u3059\u3002\u9069\u5207\u306a\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u306f\u3001\u6700\u9069\u306a\u4fe1\u53f7\u4f1d\u9054\u3092\u4fdd\u8a3c\u3057\u3001\u4fe1\u53f7\u306e\u640d\u5931\u3092\u9632\u304e\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u30a2\u30f3\u30d7\u306e\u4e00\u822c\u7684\u306a\u5165\u529b\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u306e\u5024\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3042\u308b\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>1k\u03a9\u301c3k\u03a9<\/strong>&nbsp;\u30c0\u30a4\u30ca\u30df\u30c3\u30af\u30de\u30a4\u30af\u7528<\/li>\n\n\n\n<li><strong>150\u03a9\uff5e300\u03a9<\/strong>&nbsp;\u30b3\u30f3\u30c7\u30f3\u30b5\u30fc\u30de\u30a4\u30af\u7528<\/li>\n<\/ul>\n\n\n\n<p><strong>\u30d2\u30f3\u30c8<\/strong>&nbsp;\u30c0\u30a4\u30ca\u30df\u30c3\u30af\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306e\u5834\u5408\u3001\u30a2\u30f3\u30d7\u306e\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3 \u30b9\u304c\u5c11\u306a\u304f\u3068\u3082\u4ee5\u4e0b\u306e\u5024\u3067\u3042\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002&nbsp;<strong>1k\u03a9<\/strong>&nbsp;\u30ea\u30dc\u30f3\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306e\u5834\u5408\u3001\u901a\u5e38\u3088\u308a\u9ad8\u3044\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u304c\u5fc5\u8981\u3067\u3059\u3002\u30ea\u30dc\u30f3\u30de\u30a4\u30af\u306e\u5834\u5408\u3001\u3088\u308a\u9ad8\u3044\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u304c\u8981\u6c42\u3055\u308c\u307e\u3059\u3002&nbsp;<strong>2k\u03a9<\/strong>&nbsp;\u6b63\u78ba\u306a\u5468\u6ce2\u6570\u7279\u6027\u306e\u305f\u3081\u306b\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u30de\u30a4\u30af\u306b\u9069\u3057\u305f\u5185\u8535\u30a2\u30f3\u30d7\u56de\u8def\u306e\u9078\u3073\u65b9<\/h2>\n\n\n\n<p>\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306e\u30a2\u30f3\u30d7\u56de\u8def\u3092\u9078\u629e\u3059\u308b\u969b\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u70b9\u3092\u8003\u616e\u3057\u3066\u304f\u3060\u3055\u3044\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30d7\u30ed\u7d1a\u306e\u30ec\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u3092\u884c\u3046\u306b\u306f\u3001\u30ce\u30a4\u30ba\u30d5\u30ed\u30a2\u306e\u4f4e\u3055\u3068\u30de\u30a4\u30af\u306e\u7a2e\u985e\u306b\u9069\u3057\u305f\u30b2\u30a4\u30f3\u30ec\u30d9\u30eb\u3092\u512a\u5148\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n\n\n\n<li>\u97f3\u697d\u5236\u4f5c\u306e\u3088\u3046\u306a\u7279\u6b8a\u306a\u7528\u9014\u3067\u306f\u3001\u30b5\u30a6\u30f3\u30c9\u306b\u30ad\u30e3\u30e9\u30af\u30bf\u30fc\u3092\u52a0\u3048\u308b\u305f\u3081\u306b\u3001THD\u3092\u5c11\u3057\u9ad8\u304f\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u308b\u3002<\/li>\n\n\n\n<li>\u4fe1\u53f7\u306e\u52a3\u5316\u3092\u907f\u3051\u308b\u305f\u3081\u3001\u5165\u529b\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u304c\u30de\u30a4\u30af\u306e\u8981\u4ef6\u306b\u5408\u3063\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u30de\u30a4\u30af\u8a2d\u8a08\u3092\u6700\u9069\u5316\u3059\u308b\u6e96\u5099\u306f\u3067\u304d\u3066\u3044\u307e\u3059\u304b\uff1f<\/h2>\n\n\n\n<p>\u5185\u8535\u30a2\u30f3\u30d7\u56de\u8def\u306e\u91cd\u8981\u306a\u30d1\u30e9\u30e1\u30fc\u30bf\u30fc\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u306f\u3001\u9ad8\u6027\u80fd\u306a\u30de\u30a4\u30af\u30ed\u30db\u30f3\u3092\u4f5c\u308b\u305f\u3081\u306e\u7b2c\u4e00\u6b69\u3067\u3059\u3002\u30d7\u30ed\u30d5\u30a7\u30c3\u30b7\u30e7\u30ca\u30eb\u30fb\u30aa\u30fc\u30c7\u30a3\u30aa\u30fb\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u7528\u306b\u30de\u30a4\u30af\u30ed\u30db\u30f3\u3092\u8a2d\u8a08\u3059\u308b\u5834\u5408\u3067\u3082\u3001\u7279\u5b9a\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u7528\u306b\u30de\u30a4\u30af\u30ed\u30db\u30f3\u3092\u8a2d\u8a08\u3059\u308b\u5834\u5408\u3067\u3082\u3001\u9069\u5207\u306a\u30a2\u30f3\u30d7\u56de\u8def\u304c\u3059\u3079\u3066\u306e\u9055\u3044\u3092\u751f\u307f\u51fa\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306e\u6027\u80fd\u3092\u5411\u4e0a\u3055\u305b\u305f\u3044\u5834\u5408\u3001\u307e\u305f\u306f\u9069\u5207\u306a\u30a2\u30f3\u30d7\u30fb\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3092\u9078\u629e\u3059\u308b\u969b\u306b\u30b5\u30dd\u30fc\u30c8\u304c\u5fc5\u8981\u306a\u5834\u5408\u3001&nbsp;<strong><a href=\"https:\/\/ecmicrophones.com\/ja\/contact-us\/\">\u304a\u554f\u3044\u5408\u308f\u305b<\/a><\/strong>&nbsp;\u4eca\u3059\u3050\u304a\u554f\u3044\u5408\u308f\u305b\u304f\u3060\u3055\u3044\u3002\u5f53\u793e\u306e\u5c02\u9580\u5bb6\u30c1\u30fc\u30e0\u304c\u3001\u304a\u5ba2\u69d8\u306e\u30de\u30a4\u30af\u30ed\u30db\u30f3\u8a2d\u8a08\u306e\u30cb\u30fc\u30ba\u306b\u6700\u9069\u306a\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u3092\u898b\u3064\u3051\u308b\u304a\u624b\u4f1d\u3044\u3092\u3044\u305f\u3057\u307e\u3059\u3002<\/p>","protected":false},"excerpt":{"rendered":"<p>When designing microphones or selecting components for audio devices, the role of the built-in amplifier circuit cannot be overstated. Understanding the key parameters of these amplifier circuits is essential for achieving the best audio performance. In this guide, we will break down the critical parameters of amplifier circuits in microphones, such as&nbsp;gain,&nbsp;noise floor,&nbsp;THD&nbsp;(Total Harmonic Distortion), and&nbsp;input impedance, to help you make informed decisions about your microphone design. 1. Gain: Understanding the Amplification Power Gain&nbsp;is one of the most critical parameters of a built-in amplifier circuit. It determines how much the microphone signal will be amplified. The higher the gain, the more powerful the signal. Common gain values range from&nbsp;+20dB to [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":2802,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[589,588,590],"class_list":["post-2797","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technical-insights","tag-active-circuit","tag-impedance-conversion","tag-linear-range"],"_links":{"self":[{"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/posts\/2797","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/comments?post=2797"}],"version-history":[{"count":0,"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/posts\/2797\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/media\/2802"}],"wp:attachment":[{"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/media?parent=2797"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/categories?post=2797"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/tags?post=2797"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}