{"id":2864,"date":"2025-05-28T15:58:05","date_gmt":"2025-05-28T07:58:05","guid":{"rendered":"https:\/\/ecmicrophones.com\/?p=2864"},"modified":"2026-03-05T12:39:06","modified_gmt":"2026-03-05T04:39:06","slug":"what-is-an-electret-microphone","status":"publish","type":"post","link":"https:\/\/ecmicrophones.com\/ja\/what-is-an-electret-microphone\/","title":{"rendered":"\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30fb\u30de\u30a4\u30af\u30ed\u30d5\u30a9\u30f3\u3068\u306f\uff1f"},"content":{"rendered":"<div class=\"wp-block-rank-math-toc-block\" id=\"rank-math-toc\"><div>\u3053\u306e\u8a18\u4e8b\u3067<\/div><nav><ul><li class=\"\"><a href=\"#electret-microphone-vs-traditional-condenser-microphone\">\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30fb\u30de\u30a4\u30af\u30ed\u30db\u30f3\u3068\u5f93\u6765\u306e\u30b3\u30f3\u30c7\u30f3\u30b5\u30fc\u30fb\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306e\u6bd4\u8f03<\/a><\/li><li class=\"\"><a href=\"#do-electret-microphones-need-power\">\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30fb\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306b\u96fb\u6e90\u306f\u5fc5\u8981\u304b\uff1f<\/a><\/li><li class=\"\"><a href=\"#how-does-an-electret-microphone-work\">\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30fb\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306e\u4ed5\u7d44\u307f<\/a><\/li><li class=\"\"><a href=\"#how-to-use-and-wire-an-electret-microphone\">\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30fb\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306e\u4f7f\u3044\u65b9\u3068\u914d\u7dda\u65b9\u6cd5<\/a><\/li><li class=\"\"><a href=\"#how-to-identify-electret-microphone-polarity\">\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30fb\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306e\u6975\u6027\u3092\u8b58\u5225\u3059\u308b\u306b\u306f\uff1f<\/a><\/li><li class=\"\"><a href=\"#standard-operating-voltage-for-electret-microphones\">\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30fb\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306e\u6a19\u6e96\u52d5\u4f5c\u96fb\u5727<\/a><\/li><li class=\"\"><a href=\"#history-when-was-the-electret-microphone-invented\">\u6b74\u53f2\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30fb\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306f\u3044\u3064\u767a\u660e\u3055\u308c\u305f\u306e\u304b\uff1f<\/a><\/li><li class=\"\"><a href=\"#how-to-test-an-electret-microphone\">\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30fb\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306e\u30c6\u30b9\u30c8\u65b9\u6cd5<\/a><\/li><li class=\"\"><a href=\"#conclusion\">\u7d50\u8ad6<\/a><\/li><\/ul><\/nav><\/div>\n\n\n<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\/05\/electret-microphone-mic-heads-collection.png\" alt=\"\u7570\u306a\u308b\u30e2\u30c7\u30eb\u3068\u30b5\u30a4\u30ba\u3092\u793a\u3059\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30fb\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306e\u30d8\u30c3\u30c9\u30fb\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\" class=\"wp-image-2870\" srcset=\"https:\/\/ecmicrophones.com\/wp-content\/uploads\/2025\/05\/electret-microphone-mic-heads-collection.png 925w, https:\/\/ecmicrophones.com\/wp-content\/uploads\/2025\/05\/electret-microphone-mic-heads-collection-300x175.png 300w, https:\/\/ecmicrophones.com\/wp-content\/uploads\/2025\/05\/electret-microphone-mic-heads-collection-768x448.png 768w, https:\/\/ecmicrophones.com\/wp-content\/uploads\/2025\/05\/electret-microphone-mic-heads-collection-18x12.png 18w, https:\/\/ecmicrophones.com\/wp-content\/uploads\/2025\/05\/electret-microphone-mic-heads-collection-600x350.png 600w\" sizes=\"auto, (max-width: 925px) 100vw, 925px\" \/><figcaption class=\"wp-element-caption\">\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30fb\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306f\u3001\u3055\u307e\u3056\u307e\u306a\u7528\u9014\u306b\u5408\u308f\u305b\u3066\u591a\u304f\u306e\u30b5\u30a4\u30ba\u304c\u3042\u308b\u3002<\/figcaption><\/figure>\n<\/div>\n\n\n<p>\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30fb\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306f\u3001\u591a\u304f\u306e\u96fb\u5b50\u6a5f\u5668\u306b\u642d\u8f09\u3055\u308c\u3066\u3044\u308b\u3001\u5e83\u304f\u4f7f\u308f\u308c\u3066\u3044\u308b\u5c0f\u578b\u30b3\u30f3\u30c7\u30f3\u30b5\u30fb\u30de\u30a4\u30af\u30ed\u30db\u30f3\u3067\u3042\u308b\u3002\u5916\u90e8\u304b\u3089\u306e\u5206\u6975\u96fb\u5727\u3092\u5fc5\u8981\u3068\u305b\u305a\u3001\u30b3\u30f3\u30c7\u30f3\u30b5\u30fb\u30d7\u30ec\u30fc\u30c8\u9593\u306e\u96fb\u754c\u3092\u7dad\u6301\u3059\u308b\u6c38\u4e45\u5e2f\u96fb\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u6750\u6599\u304c\u542b\u307e\u308c\u3066\u304a\u308a\u3001\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306e\u8a2d\u8a08\u3068\u7d71\u5408\u3092\u5927\u5e45\u306b\u7c21\u7d20\u5316\u3059\u308b\u3002<\/p>\n\n\n\n<p>\u5b89\u5b9a\u3057\u305f\u6027\u80fd\u3068\u30b3\u30b9\u30c8\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3067\u77e5\u3089\u308c\u308b\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30fb\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306f\u3001\u30e9\u30d9\u30ea\u30a2\u30fb\u30de\u30a4\u30af\u30ed\u30db\u30f3\u3084\u30d8\u30c3\u30c9\u30bb\u30c3\u30c8\u30fb\u30de\u30a4\u30af\u3001\u53cc\u65b9\u5411\u7121\u7dda\u6a5f\u3001\u76e3\u8996\u6a5f\u5668\u3001\u6e2c\u5b9a\u5668\u306a\u3069\u3067\u4f9d\u7136\u3068\u3057\u3066\u4eba\u6c17\u306e\u9ad8\u3044\u9078\u629e\u80a2\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u9ad8\u54c1\u8cea\u306a\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30fb\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306e\u5e45\u5e83\u3044\u30e9\u30a4\u30f3\u30ca\u30c3\u30d7\u306b\u3064\u3044\u3066\u306f\u3001\u4ee5\u4e0b\u306e\u30b5\u30a4\u30c8\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002 <a href=\"https:\/\/ecmicrophones.com\/ja\/electret-microphones\/\" target=\"_blank\" rel=\"noreferrer noopener\">\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30de\u30a4\u30af\u30ed\u30db\u30f3\u88fd\u54c1\u30da\u30fc\u30b8<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"electret-microphone-vs-traditional-condenser-microphone\">\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30fb\u30de\u30a4\u30af\u30ed\u30db\u30f3\u3068\u5f93\u6765\u306e\u30b3\u30f3\u30c7\u30f3\u30b5\u30fc\u30fb\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306e\u6bd4\u8f03<\/h2>\n\n\n\n<p>\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30fb\u30de\u30a4\u30af\u30ed\u30d5\u30a9\u30f3\u3082\u5f93\u6765\u306e\u30b3\u30f3\u30c7\u30f3\u30b5\u30fc\u30fb\u30de\u30a4\u30af\u30ed\u30d5\u30a9\u30f3\u3082\u3001\u30c0\u30a4\u30a2\u30d5\u30e9\u30e0\u306e\u632f\u52d5\u306b\u3088\u308b\u53ef\u5909\u30ad\u30e3\u30d1\u30b7\u30bf\u30f3\u30b9\u306e\u539f\u7406\u3067\u52d5\u4f5c\u3059\u308b\u3002\u3057\u304b\u3057\u3001\u91cd\u8981\u306a\u9055\u3044\u306f\u30b3\u30f3\u30c7\u30f3\u30b5\u30fc\u306e\u5206\u6975\u65b9\u6cd5\u306b\u3042\u308b\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u5f93\u6765\u306e\u30b3\u30f3\u30c7\u30f3\u30b5\u30fc\u30de\u30a4\u30af<\/strong>&nbsp;\u30b3\u30f3\u30c7\u30f3\u30b5\u30fc\u3092\u5206\u6975\u3055\u305b\u308b\u306b\u306f\u3001\u5916\u90e8\u9ad8\u96fb\u5727\u96fb\u6e90\uff08\u30d5\u30a1\u30f3\u30c8\u30e0\u96fb\u6e90\u307e\u305f\u306f\u5c02\u7528\u30d0\u30a4\u30a2\u30b9\u96fb\u5727\uff09\u304c\u5fc5\u8981\u3067\u3059\u3002<\/li>\n\n\n\n<li><strong>\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30de\u30a4\u30af\u30ed\u30d5\u30a9\u30f3<\/strong>&nbsp;\u306f\u3001\u30c0\u30a4\u30a2\u30d5\u30e9\u30e0\u307e\u305f\u306f\u30d0\u30c3\u30af\u30d7\u30ec\u30fc\u30c8\u306b\u57cb\u3081\u8fbc\u307e\u308c\u305f\u6c38\u4e45\u5e2f\u96fb\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u6750\u6599\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u305f\u3081\u3001\u5916\u90e8\u5206\u6975\u96fb\u5727\u304c\u4e0d\u8981\u3067\u3059\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u306e\u305f\u3081\u3001\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30fb\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306f\u3088\u308a\u5c0f\u578b\u3067\u3001\u30b3\u30b9\u30c8\u52b9\u7387\u306b\u512a\u308c\u3001\u6c11\u751f\u6a5f\u5668\u3078\u306e\u7d44\u307f\u8fbc\u307f\u304c\u5bb9\u6613\u306b\u306a\u3063\u3066\u3044\u308b\u3002\u8fd1\u5e74\u3001\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30fb\u30b3\u30f3\u30c7\u30f3\u30b5\u30fb\u30de\u30a4\u30af\u30ed\u30d5\u30a9\u30f3\u306f\u5927\u304d\u304f\u9032\u6b69\u3057\u3001\u591a\u304f\u306e\u30d7\u30ed\u30d5\u30a7\u30c3\u30b7\u30e7\u30ca\u30eb\u30fb\u30ec\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u306e\u5834\u9762\u3067\u4f7f\u7528\u3055\u308c\u308b\u3088\u3046\u306b\u306a\u3063\u3066\u304d\u3066\u3044\u308b\u304c\u3001\u7279\u5b9a\u306e\u30cf\u30a4\u30a8\u30f3\u30c9\u30fb\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u3001\u5f93\u6765\u306e\u30b3\u30f3\u30c7\u30f3\u30b5\u30fc\u30fb\u30de\u30a4\u30af\u30ed\u30d5\u30a9\u30f3\u304c\u4f9d\u7136\u3068\u3057\u3066\u597d\u307e\u308c\u3066\u3044\u308b\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"do-electret-microphones-need-power\">\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30fb\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306b\u96fb\u6e90\u306f\u5fc5\u8981\u304b\uff1f<\/h2>\n\n\n\n<p>\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30fb\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306f\u6c38\u4e45\u504f\u6975\u5c64\u3092\u5185\u8535\u3057\u3066\u3044\u308b\u304c\u3001\u5185\u8535\u306e\u96fb\u754c\u52b9\u679c\u30c8\u30e9\u30f3\u30b8\u30b9\u30bf\uff08FET\uff09\u30a2\u30f3\u30d7\u304c\u52d5\u4f5c\u3059\u308b\u306b\u306fDC\u30d0\u30a4\u30a2\u30b9\u96fb\u5727\u304c\u5fc5\u8981\u3067\u3042\u308b\u3002\u4e00\u822c\u7684\u306a\u96fb\u6e90\u96fb\u5727\u306f1.5V\u304b\u30894.5V\u3067\u3001\u4e00\u822c\u7684\u306b\u306f2V\u524d\u5f8c\u3067\u3059\u3002<\/p>\n\n\n<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\/05\/electret-microphone-bias-circuit-diagram.png\" alt=\"2.2K\u62b5\u6297\u30682V DC\u30d0\u30a4\u30a2\u30b9\u3067\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30fb\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306b\u96fb\u529b\u3092\u4f9b\u7d66\u3059\u308b\u65b9\u6cd5\u3092\u793a\u3059\u56de\u8def\u4f8b\u3002\" class=\"wp-image-2874\" srcset=\"https:\/\/ecmicrophones.com\/wp-content\/uploads\/2025\/05\/electret-microphone-bias-circuit-diagram.png 925w, https:\/\/ecmicrophones.com\/wp-content\/uploads\/2025\/05\/electret-microphone-bias-circuit-diagram-300x175.png 300w, https:\/\/ecmicrophones.com\/wp-content\/uploads\/2025\/05\/electret-microphone-bias-circuit-diagram-768x448.png 768w, https:\/\/ecmicrophones.com\/wp-content\/uploads\/2025\/05\/electret-microphone-bias-circuit-diagram-18x12.png 18w, https:\/\/ecmicrophones.com\/wp-content\/uploads\/2025\/05\/electret-microphone-bias-circuit-diagram-600x350.png 600w\" sizes=\"auto, (max-width: 925px) 100vw, 925px\" \/><figcaption class=\"wp-element-caption\">\u5178\u578b\u7684\u306a\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30fb\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306e\u30d0\u30a4\u30a2\u30b9\u56de\u8def\uff1a2.2K\u03a9\u306e\u62b5\u6297\u3092\u4ecb\u3057\u30662V\u306eDC\u96fb\u6e90\u3092\u4f9b\u7d66\u3059\u308b\u3002<\/figcaption><\/figure>\n<\/div>\n\n\n<p>\u30e2\u30c7\u30eb\u306b\u3088\u3063\u3066\u5fc5\u8981\u306a\u96fb\u5727\u304c\u7570\u306a\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u904e\u5ea6\u306e\u9ad8\u96fb\u5727\u3084\u4f4e\u96fb\u5727\u306f\u3001\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306e\u6027\u80fd\u3068\u5bff\u547d\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u30c7\u30fc\u30bf\u30b7\u30fc\u30c8\u306e\u4ed5\u69d8\u306b\u5f93\u3046\u3053\u3068\u304c\u4e0d\u53ef\u6b20\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"how-does-an-electret-microphone-work\">\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30fb\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306e\u4ed5\u7d44\u307f<\/h2>\n\n\n\n<p>\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306f\u30b3\u30f3\u30c7\u30f3\u30b5\u306e\u539f\u7406\u306b\u57fa\u3065\u3044\u3066\u52d5\u4f5c\u3059\u308b\u3002\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306e\u5185\u90e8\u3067\u306f\u3001\u30c0\u30a4\u30a2\u30d5\u30e9\u30e0\u3068\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u96fb\u6975\u304c\u30b3\u30f3\u30c7\u30f3\u30b5\u3092\u5f62\u6210\u3057\u3066\u3044\u308b\u3002\u97f3\u6ce2\u306f\u30c0\u30a4\u30a2\u30d5\u30e9\u30e0\u3092\u632f\u52d5\u3055\u305b\u3001\u9759\u96fb\u5bb9\u91cf\u3092\u5909\u5316\u3055\u305b\u307e\u3059\u3002\u5185\u8535\u306eFET\u30a2\u30f3\u30d7\u306f\u3001\u3053\u306e\u9759\u96fb\u5bb9\u91cf\u306e\u5909\u5316\u3092\u96fb\u6c17\u4fe1\u53f7\u306b\u5909\u63db\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u69cb\u9020\u306b\u306f\u3001\u4e3b\u306b\u30d5\u30ed\u30f3\u30c8\u30fb\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u3068\u30d0\u30c3\u30af\u30fb\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u306e2\u7a2e\u985e\u304c\u3042\u308b\u3002\u30d5\u30ed\u30f3\u30c8\u30fb\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u306f\u632f\u52d5\u677f\u81ea\u4f53\u306b\u5e2f\u96fb\u7269\u8cea\u3092\u57cb\u3081\u8fbc\u3080\u69cb\u9020\u3067\u3001\u30d0\u30c3\u30af\u30fb\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u306f\u632f\u52d5\u677f\u306e\u5f8c\u308d\u306e\u30d0\u30c3\u30af\u30d7\u30ec\u30fc\u30c8\u306b\u5e2f\u96fb\u7269\u8cea\u3092\u57cb\u3081\u8fbc\u3080\u69cb\u9020\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u73fe\u5728\u3001\u307b\u3068\u3093\u3069\u306e\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30fb\u30de\u30a4\u30af\u30ed\u30db\u30f3\u304c\u30d0\u30c3\u30af\u30fb\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u69cb\u9020\u3092\u63a1\u7528\u3057\u3066\u3044\u308b\u306e\u306f\u3001\u65e7\u6765\u306e\u30d5\u30ed\u30f3\u30c8\u30fb\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u578b\u306b\u6bd4\u3079\u3066\u5b89\u5b9a\u6027\u304c\u5411\u4e0a\u3057\u3001\u30ce\u30a4\u30ba\u304c\u6e1b\u5c11\u3057\u3001\u5468\u6ce2\u6570\u7279\u6027\u304c\u6539\u5584\u3055\u308c\u305f\u304b\u3089\u3067\u3042\u308b\u3002<\/p>\n\n\n\n<p>\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u7d20\u6750\u306f\u6c38\u4e45\u7684\u306b\u5e2f\u96fb\u3057\u3066\u3044\u308b\u305f\u3081\u3001\u3053\u306e\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306f\u5916\u90e8\u304b\u3089\u306e\u504f\u6975\u96fb\u5727\u3092\u5fc5\u8981\u3068\u305b\u305a\u3001\u5f93\u6765\u306e\u30b3\u30f3\u30c7\u30f3\u30b5\u30fc\u30fb\u30de\u30a4\u30af\u30ed\u30db\u30f3\u3068\u306f\u4e00\u7dda\u3092\u753b\u3057\u3066\u3044\u308b\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"how-to-use-and-wire-an-electret-microphone\">\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30fb\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306e\u4f7f\u3044\u65b9\u3068\u914d\u7dda\u65b9\u6cd5<\/h2>\n\n\n\n<p>\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306f\u901a\u5e38\u3001\u30d7\u30e9\u30b9\uff08\u30d1\u30ef\u30fc\uff09\u3068\u30de\u30a4\u30ca\u30b9\uff08\u30b0\u30e9\u30f3\u30c9\uff09\u306e2\u672c\u306e\u30ea\u30fc\u30c9\u7dda\u3092\u6301\u3063\u3066\u3044\u307e\u3059\u30022\u30d4\u30f3\u30683\u30d4\u30f3\u306e\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306e\u914d\u7dda\u306b\u95a2\u3059\u308b\u8a73\u7d30\u306a\u30ac\u30a4\u30c9\uff08\u30cf\u30f3\u30c0\u30d1\u30c3\u30c9\u3068\u30d4\u30f3\u30bf\u30a4\u30d7\u306e\u69cb\u6210\u3092\u542b\u3080\uff09\u306b\u3064\u3044\u3066\u306f\u3001\u4ee5\u4e0b\u306e\u30b5\u30a4\u30c8\u3092\u3054\u53c2\u7167\u4e0b\u3055\u3044\u3002&nbsp;<a href=\"https:\/\/ecmicrophones.com\/ja\/electret-microphone-wiring-guide\/\" target=\"_blank\" rel=\"noreferrer noopener\">\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30fb\u30de\u30a4\u30af\u30ed\u30db\u30f3\u914d\u7dda\u30ac\u30a4\u30c9<\/a>.<\/p>\n\n\n\n<p>\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306e\u30c7\u30fc\u30bf\u30b7\u30fc\u30c8\u306b\u8a18\u8f09\u3055\u308c\u3066\u3044\u308b\u914d\u7dda\u624b\u9806\u3068\u96fb\u6c17\u7684\u30d1\u30e9\u30e1\u30fc\u30bf\u306b\u5fc5\u305a\u5f93\u3063\u3066\u304f\u3060\u3055\u3044\u3002.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"how-to-identify-electret-microphone-polarity\">\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30fb\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306e\u6975\u6027\u3092\u8b58\u5225\u3059\u308b\u306b\u306f\uff1f<\/h2>\n\n\n<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\/05\/electret-mic-polarity-plus-mark-negative-gap.png\" alt=\"\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306e\u6975\u6027\uff1a\u30d7\u30e9\u30b9\u7aef\u5b50\u306b\u306f\u30d7\u30e9\u30b9\u8a18\u53f7\u3001\u30de\u30a4\u30ca\u30b9\u7aef\u5b50\u306b\u306f\u9699\u9593\u304c\u3042\u308b\" class=\"wp-image-2869\" srcset=\"https:\/\/ecmicrophones.com\/wp-content\/uploads\/2025\/05\/electret-mic-polarity-plus-mark-negative-gap.png 925w, https:\/\/ecmicrophones.com\/wp-content\/uploads\/2025\/05\/electret-mic-polarity-plus-mark-negative-gap-300x175.png 300w, https:\/\/ecmicrophones.com\/wp-content\/uploads\/2025\/05\/electret-mic-polarity-plus-mark-negative-gap-768x448.png 768w, https:\/\/ecmicrophones.com\/wp-content\/uploads\/2025\/05\/electret-mic-polarity-plus-mark-negative-gap-18x12.png 18w, https:\/\/ecmicrophones.com\/wp-content\/uploads\/2025\/05\/electret-mic-polarity-plus-mark-negative-gap-600x350.png 600w\" sizes=\"auto, (max-width: 925px) 100vw, 925px\" \/><figcaption class=\"wp-element-caption\">\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30fb\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306e\u6975\u6027\u306e\u898b\u5206\u3051\u65b9\uff1a\u300c\u306f\u30d7\u30e9\u30b9\u7aef\u5b50\u3001\u5207\u308a\u6b20\u304d\u306f\u30de\u30a4\u30ca\u30b9\u7aef\u5b50\u3092\u793a\u3059\u3002<\/figcaption><\/figure>\n<\/div>\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u30b9\u30c6\u30c3\u30d7<\/th><th>\u65b9\u6cd5<\/th><th>\u30dd\u30b8\u30c6\u30a3\u30d6\u30fb\u30ea\u30fc\u30c9<\/th><th>\u30cd\u30ac\u30c6\u30a3\u30d6\u30fb\u30ea\u30fc\u30c9<\/th><th>\u5099\u8003<\/th><\/tr><\/thead><tbody><tr><td>1<\/td><td>\u76ee\u8996\u691c\u67fb<\/td><td>\u30de\u30fc\u30af<\/td><td>\u30de\u30fc\u30af<\/td><td>\u6700\u9ad8\u306e\u7cbe\u5ea6\u3092\u5f97\u308b\u305f\u3081\u306b\u3001\u307e\u305a\u30b7\u30f3\u30dc\u30eb\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b<\/td><\/tr><tr><td>2<\/td><td>PCB\u30d1\u30c3\u30c9\u306e\u89b3\u5bdf<\/td><td>\u7dd1\u307e\u305f\u306f\u9752\u306e\u306f\u3093\u3060\u30de\u30b9\u30af\u3067\u5b8c\u5168\u306b\u56f2\u307e\u308c\u305f\u30d1\u30c3\u30c9<\/td><td>\u30d1\u30c3\u30c9\u3092\u91d1\u5c5e\u30b1\u30fc\u30b7\u30f3\u30b0\u306b\u76f4\u63a5\u63a5\u7d9a\u3001\u306f\u3093\u3060\u30de\u30b9\u30af\u306a\u3057<\/td><td>\u3088\u308a\u826f\u3044\u5224\u65ad\u306e\u305f\u3081\u306b\u62e1\u5927\u93e1\u3092\u4f7f\u7528\u3059\u308b<\/td><\/tr><tr><td>3<\/td><td>\u30de\u30eb\u30c1\u30e1\u30fc\u30bf\u30fc\u6e2c\u5b9a<\/td><td>2.2k\u03a9\u304b\u308910k\u03a9\u306e\u9593\u306e\u30b1\u30fc\u30b7\u30f3\u30b0\u306b\u5bfe\u3059\u308b\u62b5\u6297<\/td><td>\u30b1\u30fc\u30b7\u30f3\u30b0\u306b\u5bfe\u3059\u308b\u62b5\u6297\u306f5\u03a9\u4ee5\u4e0b<\/td><td>\u30de\u30eb\u30c1\u30e1\u30fc\u30bf\u30fc\u306e2k\u03a9\u62b5\u6297\u8a2d\u5b9a\u3092\u4f7f\u7528<\/td><\/tr><tr><td>*<\/td><td>\u30c7\u30fc\u30bf\u30b7\u30fc\u30c8\u3092\u30c1\u30a7\u30c3\u30af<\/td><td>\u30e9\u30d9\u30eb\u306f\u300c+\u300d\u7aef\u5b50<\/td><td>\u30e9\u30d9\u30eb\u306f\u300c-\u300d\u7aef\u5b50<\/td><td>\u6700\u3082\u6a29\u5a01\u306e\u3042\u308b\u65b9\u6cd5\u3067\u3001\u3059\u3079\u3066\u306e\u30e2\u30c7\u30eb\u306b\u9069\u7528\u53ef\u80fd<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"standard-operating-voltage-for-electret-microphones\">\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30fb\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306e\u6a19\u6e96\u52d5\u4f5c\u96fb\u5727<\/h2>\n\n\n\n<p>\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30fb\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306e\u4e00\u822c\u7684\u306a\u52d5\u4f5c\u96fb\u5727\u306f1.5V\uff5e4.5V\u3067\u3042\u308b\u3002\u4e00\u822c\u7684\u306a\u96fb\u5727\u306b\u306f1.5V\u30012V\u30012.1V\u30012.2V\u30013V\u30014.5V\u304c\u3042\u308b\u3002<\/p>\n\n\n\n<p>\u96fb\u6e90\u96fb\u5727\u306f\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306e\u6027\u80fd\u306b\u5927\u304d\u304f\u5f71\u97ff\u3057\u307e\u3059\u3002\u96fb\u5727\u304c\u9ad8\u3059\u304e\u308b\u3068\u6b6a\u307f\u304c\u751f\u3058\u3001\u4f4e\u3059\u304e\u308b\u3068\u4fe1\u53f7\u304c\u5f31\u304f\u306a\u308a\u3001\u611f\u5ea6\u304c\u4f4e\u4e0b\u3057\u3001S\/N\u6bd4\u304c\u60aa\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306e\u30c7\u30fc\u30bf\u30b7\u30fc\u30c8\u306b\u8a18\u8f09\u3055\u308c\u3066\u3044\u308b\u96fb\u5727\u4ed5\u69d8\u306b\u53b3\u5bc6\u306b\u5f93\u3046\u3053\u3068\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"history-when-was-the-electret-microphone-invented\">\u6b74\u53f2\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30fb\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306f\u3044\u3064\u767a\u660e\u3055\u308c\u305f\u306e\u304b\uff1f<\/h2>\n\n\n\n<p>\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30fb\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306f\u30011962\u5e74\u306b\u30d9\u30eb\u7814\u7a76\u6240\u306e\u30b8\u30a7\u30fc\u30e0\u30b9\u30fb\u30a6\u30a7\u30b9\u30c8\u3068\u30b2\u30eb\u30cf\u30eb\u30c8\u30fb\u30bb\u30b9\u30e9\u30fc\u306b\u3088\u3063\u3066\u767a\u660e\u3055\u308c\u305f\u3002\u305d\u306e\u30b7\u30f3\u30d7\u30eb\u306a\u69cb\u9020\u3001\u4f4e\u30b3\u30b9\u30c8\u3001\u5b89\u5b9a\u3057\u305f\u6027\u80fd\u306b\u3088\u308a\u3001\u6025\u901f\u306b\u5e02\u5834\u3092\u652f\u914d\u3059\u308b\u30de\u30a4\u30af\u30ed\u30db\u30f3\u6280\u8853\u3068\u306a\u3063\u305f\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" 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class=\"wp-block-heading\" id=\"conclusion\">\u7d50\u8ad6<\/h2>\n\n\n\n<p>\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306f\u3001\u305d\u306e\u30b3\u30b9\u30c8\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u4fe1\u983c\u6027\u306e\u9ad8\u3044\u6027\u80fd\u304b\u3089\u5e83\u304f\u63a1\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306e\u52d5\u4f5c\u539f\u7406\u3001\u6975\u6027\u306e\u8b58\u5225\u3001\u96fb\u6e90\u8981\u4ef6\u3001\u6b63\u3057\u3044\u914d\u7dda\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u306f\u3001\u3053\u308c\u3089\u306e\u30de\u30a4\u30af\u30ed\u30db\u30f3\u3092\u52b9\u679c\u7684\u306b\u8a2d\u8a08\u30fb\u4f7f\u7528\u3059\u308b\u4e0a\u3067\u975e\u5e38\u306b\u91cd\u8981\u3067\u3059\u3002<\/p>","protected":false},"excerpt":{"rendered":"<p>An electret microphone is a widely used small capacitor microphone found in many electronic devices. It contains a permanently charged electret material that maintains an electric field between capacitor plates without the need for external polarization voltage, greatly simplifying microphone design and integration. Known for its stable performance and cost-effectiveness, the electret microphone remains a popular choice in lavalier and headset microphones, two-way radios, surveillance equipment, and measurement instruments. For a wide range of high-quality electret microphones, you can visit our Electret Microphones product page. Electret Microphone vs. Traditional Condenser Microphone Both electret microphones and traditional condenser microphones work on the principle of variable capacitance caused by diaphragm vibration. However, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":2870,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[572,570,571],"class_list":["post-2864","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technical-insights","tag-acoustic-fundamentals","tag-capacitor-microphone","tag-ecm-basics"],"_links":{"self":[{"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/posts\/2864","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=2864"}],"version-history":[{"count":0,"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/posts\/2864\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/media\/2870"}],"wp:attachment":[{"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/media?parent=2864"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/categories?post=2864"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/tags?post=2864"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}