{"id":3569,"date":"2025-09-30T16:52:52","date_gmt":"2025-09-30T08:52:52","guid":{"rendered":"https:\/\/ecmicrophones.com\/?p=3569"},"modified":"2026-01-27T15:54:20","modified_gmt":"2026-01-27T07:54:20","slug":"electret-microphone-impedance-quick-guide-for-device-manufacturers","status":"publish","type":"post","link":"https:\/\/ecmicrophones.com\/ja\/electret-microphone-impedance-quick-guide-for-device-manufacturers\/","title":{"rendered":"\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306e\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\uff1a\u30c7\u30d0\u30a4\u30b9\u30e1\u30fc\u30ab\u30fc\u5411\u3051\u30af\u30a4\u30c3\u30af\u30ac\u30a4\u30c9"},"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\/09\/ecm-impedance-raspberrypi-lavalier.png\" alt=\"Raspberry Pi\u3068\u30e9\u30d9\u30ea\u30a2\u30fb\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u305f\u3081\u306e\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30fb\u30de\u30a4\u30af\u30ed\u30db\u30f3\uff08ECM\uff09\u51fa\u529b\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u30fb\u30de\u30c3\u30c1\u30f3\u30b0\" class=\"wp-image-3572\" srcset=\"https:\/\/ecmicrophones.com\/wp-content\/uploads\/2025\/09\/ecm-impedance-raspberrypi-lavalier.png 925w, https:\/\/ecmicrophones.com\/wp-content\/uploads\/2025\/09\/ecm-impedance-raspberrypi-lavalier-300x175.png 300w, https:\/\/ecmicrophones.com\/wp-content\/uploads\/2025\/09\/ecm-impedance-raspberrypi-lavalier-768x448.png 768w, https:\/\/ecmicrophones.com\/wp-content\/uploads\/2025\/09\/ecm-impedance-raspberrypi-lavalier-18x12.png 18w, https:\/\/ecmicrophones.com\/wp-content\/uploads\/2025\/09\/ecm-impedance-raspberrypi-lavalier-600x350.png 600w\" sizes=\"auto, (max-width: 925px) 100vw, 925px\" \/><figcaption class=\"wp-element-caption\">\u30e9\u30ba\u30d9\u30ea\u30fc\u30d1\u30a4\u7528ECM\u30ab\u30d7\u30bb\u30eb(1k\u03a9-2.2k\u03a9)\u3068\u30e9\u30d9\u30ea\u30a2\u30de\u30a4\u30af\u30ed\u30db\u30f3(680\u03a9-1k\u03a9)\u306e\u5178\u578b\u7684\u306a\u51fa\u529b\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u306f\u3001\u9069\u5207\u306aPCB\u5165\u529b\u30de\u30c3\u30c1\u30f3\u30b0\u3092\u4fdd\u8a3c\u3057\u307e\u3059\u3002<\/figcaption><\/figure>\n<\/div>\n\n\n<p>\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30b3\u30f3\u30c7\u30f3\u30b5\u30fc\u30de\u30a4\u30af\u30ed\u30d5\u30a9\u30f3\uff08ECM\u30ab\u30d7\u30bb\u30eb\uff09\u306b\u306f\u3001\u51fa\u529b\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u306e\u7570\u306a\u308b\u3082\u306e\u304c\u3042\u308a\u307e\u3059\u3002<strong>550\u03a9\u3001680\u03a9\u30011k\u03a9\u30012k\u03a9\u30012.2k\u03a9<\/strong>.\u3053\u308c\u3089\u306e\u5024\u306f\u3001\u30de\u30a4\u30af\u30ed\u30db\u30f3\u3068\u30c7\u30d0\u30a4\u30b9\u306e\u5165\u529b\u6bb5\u3068\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306b\u5f71\u97ff\u3059\u308b\u3002\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u304c\u9ad8\u3044\u307b\u3069\u4fe1\u53f7\u304c\u5f37\u304f\u306a\u308a\u3001\u4f4e\u3044\u307b\u3069\u9577\u3044\u30c8\u30ec\u30fc\u30b9\u3084\u30ce\u30a4\u30ba\u306e\u591a\u3044\u74b0\u5883\u3067\u306e\u4f7f\u7528\u306b\u9069\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e00\u822c\u7684\u306a\u30c7\u30d0\u30a4\u30b9\u30fb\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u30d8\u30c3\u30c9\u30bb\u30c3\u30c8\uff06\u30b3\u30fc\u30eb\u30bb\u30f3\u30bf\u30fc\u30de\u30a4\u30af<\/strong>\u00a0\u901a\u5e38\u3001\u9ad8\u5165\u529b\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u30fb\u30d7\u30ea\u30a2\u30f3\u30d7\u7528\u306e2.2k\u03a9\u3067\u3001\u30af\u30ea\u30a2\u306a\u97f3\u58f0\u3068\u826f\u597d\u306a\u611f\u5ea6\u3092\u78ba\u4fdd\u3059\u308b\u3002<\/li>\n\n\n\n<li><strong>\u53cc\u65b9\u5411\u7121\u7dda\u6a5f\u3001\u30c8\u30e9\u30f3\u30b7\u30fc\u30d0\u30fc\u3001CCTV\/\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u6a5f\u5668\uff1a<\/strong>\u00a0\u5165\u529b\u6bb5\u3068\u30c8\u30ec\u30fc\u30b9\u9577\u306b\u5fdc\u3058\u3066680\u03a9-2.2k\u03a9\u3068\u306a\u308a\u3001\u5e72\u6e09\u3092\u4f4e\u6e1b\u3057\u3001\u7d44\u307f\u8fbc\u307f\u30b3\u30fc\u30c7\u30c3\u30af\u306b\u30de\u30c3\u30c1\u3059\u308b\u3002<\/li>\n\n\n\n<li><strong>\u7d44\u8fbc\u307f\u30dc\u30a4\u30b9\u30ec\u30b3\u30fc\u30c0\u30fc\u3001\u4f1a\u8b70\u30b7\u30b9\u30c6\u30e0\u3001\u30a4\u30f3\u30bf\u30fc\u30b3\u30e0\uff1a<\/strong>\u00a01k\u03a9\uff5e2.2k\u03a9\u3001\u4e00\u822c\u7684\u306b\u306f\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30fb\u30de\u30a4\u30af\u30ed\u30db\u30f3\u3092\u4f7f\u7528\u3057\u3001\u30af\u30ea\u30a2\u306a\u97f3\u58f0\u3092\u53d6\u308a\u8fbc\u307f\u3001\u671b\u307e\u3057\u3044SNR\u3092\u5b9f\u73fe\u3059\u308b\u3002<\/li>\n\n\n\n<li><strong>\u822a\u7a7a \/ \u7279\u6b8a\u901a\u4fe1\u30d8\u30c3\u30c9\u30bb\u30c3\u30c8\uff1a<\/strong>\u00a0\u30ec\u30ac\u30b7\u30fc\u30fb\u30a2\u30ca\u30ed\u30b0\u5165\u529b\u3084\u53b3\u3057\u3044\u4fe1\u983c\u6027\u8981\u4ef6\u306b\u306f\u3001550\u03a9\u307e\u305f\u306f\u30ab\u30b9\u30bf\u30e0\u3002<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u304c\u91cd\u8981\u306a\u7406\u7531<\/h2>\n\n\n\n<p>\u51fa\u529b\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u306f\u3001\u4fe1\u53f7\u30ec\u30d9\u30eb\u3001\u30ce\u30a4\u30ba\u3001PCB\u4e0a\u306e\u30a2\u30f3\u30d7\u3084ADC\u3068\u306e\u4e92\u63db\u6027\u306b\u5f71\u97ff\u3057\u307e\u3059\u3002\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u306f\u3001\u4fe1\u983c\u6027\u304c\u9ad8\u304f\u3001\u30ce\u30a4\u30ba\u306e\u5c11\u306a\u3044\u30aa\u30fc\u30c7\u30a3\u30aa\u30fb\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5b9f\u73fe\u3059\u308b\u305f\u3081\u306e\u9069\u5207\u306a\u30ab\u30d7\u30bb\u30eb\u306e\u9078\u629e\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u5de5\u5834\u306e\u304a\u5ba2\u69d8\u304c\u9069\u5207\u306a\u30ab\u30d7\u30bb\u30eb\u3092\u9078\u629e\u3059\u308b\u305f\u3081\u306e\u652f\u63f4\u65b9\u6cd5<\/h2>\n\n\n\n<p>\u304a\u5ba2\u69d8\u306e\u88fd\u54c1\u306b\u6700\u9069\u306a\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30de\u30a4\u30af\u30ed\u30db\u30f3\u3092\u63d0\u6848\u3059\u308b\u305f\u3081\u306b\u3001\u5f53\u793e\u306e\u30a8\u30f3\u30b8\u30cb\u30a2\u306f\u3044\u304f\u3064\u304b\u306e\u91cd\u8981\u306a\u60c5\u5831\u3092\u304a\u5ba2\u69d8\u304b\u3089\u3044\u305f\u3060\u304f\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u5927\u91cf\u751f\u7523\u3055\u308c\u3001\u5b89\u5b9a\u6027\u304c\u5b9f\u8a3c\u3055\u308c\u3001\u597d\u610f\u7684\u306a\u8a55\u4fa1\u3092\u5f97\u3066\u3044\u308b\u88fd\u54c1\u3092\u304a\u5ba2\u69d8\u306e\u8981\u4ef6\u306b\u9069\u5408\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\/\u30c7\u30d0\u30a4\u30b9<\/strong>\u00a0\u30de\u30a4\u30af\u30ed\u30db\u30f3\u30ab\u30d7\u30bb\u30eb\u306f\u3069\u306e\u3088\u3046\u306a\u88fd\u54c1\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u304b\uff1f\u5fdc\u7528\u5206\u91ce\u306f\u4f55\u3067\u3059\u304b\uff1f<\/li>\n\n\n\n<li><strong>\u88fd\u54c1\u30b9\u30c6\u30fc\u30b8\uff1a<\/strong>\u00a0\u305d\u306e\u88fd\u54c1\u306f\u958b\u767a\u4e2d\u3067\u3059\u304b\u3001\u305d\u308c\u3068\u3082\u3059\u3067\u306b\u5927\u91cf\u751f\u7523\u3055\u308c\u3066\u3044\u307e\u3059\u304b\uff1f<\/li>\n\n\n\n<li><strong>\u5177\u4f53\u7684\u306a\u8981\u4ef6<\/strong>\u00a0\u30de\u30a4\u30af\u30ab\u30d7\u30bb\u30eb\u306e\u4e3b\u8981\u306a\u30d1\u30e9\u30e1\u30fc\u30bf\u30fc\u306f\u4f55\u3067\u3059\u304b\uff1f\u4f8b\u3048\u3070\n<ul 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href=\"\/ja\/electret-microphone-applications\/\">\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30da\u30fc\u30b8<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"<p>Electret condenser microphones (ECM capsules) come in different output impedances\u2014550\u03a9, 680\u03a9, 1k\u03a9, 2k\u03a9, 2.2k\u03a9. These values affect how the microphone interfaces with the device\u2019s input stage. Higher impedance may give stronger signal; lower impedance is better for driving longer traces or noisy environments. Common device applications Why impedance matters Output impedance affects signal level, noise, and compatibility with the amplifier or ADC on the PCB. Understanding impedance helps choose the right capsule for reliable, low-noise audio performance. How we help factory customers select the right capsule To recommend the most suitable electret microphone for your product, our engineers need some key information from you. This allows us to match your [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":3572,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[545,544],"class_list":["post-3569","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technical-insights","tag-550-2-2k","tag-ecm"],"_links":{"self":[{"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/posts\/3569","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=3569"}],"version-history":[{"count":0,"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/posts\/3569\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/media\/3572"}],"wp:attachment":[{"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/media?parent=3569"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/categories?post=3569"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/tags?post=3569"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}