{"id":4046,"date":"2026-03-20T15:02:19","date_gmt":"2026-03-20T07:02:19","guid":{"rendered":"https:\/\/ecmicrophones.com\/?p=4046"},"modified":"2026-03-28T09:17:45","modified_gmt":"2026-03-28T01:17:45","slug":"electret-microphone-impedance-and-voltage-2-terminal-vs-3-terminal","status":"publish","type":"post","link":"https:\/\/ecmicrophones.com\/ja\/electret-microphone-impedance-and-voltage-2-terminal-vs-3-terminal\/","title":{"rendered":"\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30fb\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306e\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u3068\u96fb\u5727\uff1a2\u7aef\u5b50\u30683\u7aef\u5b50\u306e\u6bd4\u8f03"},"content":{"rendered":"
\n
\"2\u7aef\u5b50\u30683\u7aef\u5b50\u306e\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306e\u6bd4\u8f03\"
\u56f30\uff1a2\u7aef\u5b50\uff08\u5de6\uff09\u30683\u7aef\u5b50\uff08\u53f3\uff09\u306e\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30de\u30a4\u30af\u30ed\u30db\u30f3\uff08\u5b9f\u6a5f\uff09\u3002.<\/figcaption><\/figure>\n<\/div>\n\n\n

\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306f\u3001\u6b21\u306e\u3088\u3046\u306b\u5927\u5225\u3055\u308c\u308b\u3002 \u30bf\u30fc\u30df\u30ca\u30eb\u30bf\u30a4\u30d7<\/strong>, \u4e00\u822c\u7684\u306b2\u7aef\u5b50\u30683\u7aef\u5b50\u306e\u8a2d\u8a08\u306b\u5206\u3051\u3089\u308c\u308b\u3002\u6700\u3082\u76ee\u306b\u898b\u3048\u308b\u9055\u3044\u306f\u3001\u306f\u3093\u3060\u30d1\u30c3\u30c9\u306e\u6570\u3067\u3059\u304c\u3001\u3088\u308a\u91cd\u8981\u306a\u9055\u3044\u306f\u3001\u4ee5\u4e0b\u306e\u70b9\u306b\u3042\u308a\u307e\u3059\u3002 \u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u3068\u4f7f\u7528\u96fb\u5727<\/strong>.<\/p>\n\n\n\n

\u4ee3\u8868\u7684\u306a\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u3068\u96fb\u5727<\/h2>\n\n\n\n
\u7aef\u5b50\u30bf\u30a4\u30d7<\/th>\u5171\u901a\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9<\/th>\u4f4e\u30b3\u30e2\u30f3\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9<\/th>\u6a19\u6e96\u96fb\u5727<\/th><\/tr><\/thead>
2\u7aef\u5b50<\/td>2K\u03a9<\/td>\u2014<\/td>1.5V\u30012V<\/td><\/tr>
3\u7aef\u5b50<\/td>1K\u03a9\u3001680\u03a9<\/td>550\u03a9\u30012.2K\u03a9<\/td>1.5V\u30012V\u30013V\u3001\u6700\u59275V<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

2\u7aef\u5b50\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30fb\u30de\u30a4\u30af\u30ed\u30db\u30f3<\/h2>\n\n\n\n

\u307b\u3068\u3093\u3069\u306e2\u7aef\u5b50\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306f \u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b92K\u03a9<\/strong> \u3067\u52d5\u4f5c\u3059\u308b\u3002 2V<\/strong>, V\u306e\u4f4e\u96fb\u5727\u30e2\u30c7\u30eb\u3082\u3042\u308b\u3002\u3053\u308c\u3089\u306e\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306f\u4f7f\u3044\u3084\u3059\u304f\u3001\u96fb\u6e90\u3068\u4fe1\u53f7\u306e2\u3064\u306e\u63a5\u7d9a\u3057\u304b\u5fc5\u8981\u3068\u3057\u306a\u3044\u3002\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u304c\u56fa\u5b9a\u3055\u308c\u3066\u3044\u308b\u305f\u3081\u3001\u56de\u8def\u30de\u30c3\u30c1\u30f3\u30b0\u306e\u67d4\u8edf\u6027\u304c\u5236\u9650\u3055\u308c\u308b\u3002.<\/p>\n\n\n\n

2\u7aef\u5b50\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306e\u8a73\u7d30\u306b\u3064\u3044\u3066\u306f\u3001\u4ee5\u4e0b\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002 2\u7aef\u5b50\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30fb\u30de\u30a4\u30af\u30ed\u30db\u30f3<\/a> \u88fd\u54c1\u30da\u30fc\u30b8\u3002.<\/p>\n\n\n\n

3\u7aef\u5b50\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30fb\u30de\u30a4\u30af\u30ed\u30db\u30f3<\/h2>\n\n\n\n

3\u7aef\u5b50\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306f\u3001\u30b0\u30e9\u30f3\u30c9\u3001\u4fe1\u53f7\u51fa\u529b\u3001\u30d0\u30a4\u30a2\u30b9\u96fb\u5727\u7528\u306b\u5225\u3005\u306e\u7aef\u5b50\u3092\u5099\u3048\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u8a2d\u8a08\u306b\u3088\u308a\u3001\u3088\u308a\u5e45\u5e83\u3044 \u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u3068\u96fb\u5727\u306e\u30aa\u30d7\u30b7\u30e7\u30f3<\/strong>. .\u6700\u3082\u4e00\u822c\u7684\u306a\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u306f 1K\u03a9\u304a\u3088\u3073680\u03a9<\/strong>, \u4e00\u65b9 550\u03a9\u304a\u3088\u30732.2K\u03a9<\/strong> \u306f\u7a00\u3067\u3042\u308b\u3002\u4f7f\u7528\u96fb\u5727\u306e\u7bc4\u56f2\u306f 1.5V\uff5e5V<\/strong>.<\/p>\n\n\n\n

3\u7aef\u5b50\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306e\u8a73\u7d30\u306b\u3064\u3044\u3066\u306f\u3001\u4ee5\u4e0b\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002 3\u7aef\u5b50\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30fb\u30de\u30a4\u30af\u30ed\u30db\u30f3<\/a> \u88fd\u54c1\u30da\u30fc\u30b8\u3002.<\/p>\n\n\n\n

3\u7aef\u5b50\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306e\u7528\u9014<\/h3>\n\n\n\n

\u305d\u306e\u67d4\u8edf\u6027\u306b\u3088\u308a\u30013\u7aef\u5b50\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30cf\u30a4\u30a8\u30f3\u30c9\u306e\u30aa\u30fc\u30c7\u30a3\u30aa\u6a5f\u5668\u306b\u7406\u60f3\u7684\u306a\u3082\u306e\u3068\u306a\u3063\u3066\u3044\u308b\uff1a<\/p>\n\n\n\n

    \n
  • \u30ce\u30a4\u30ba\u30ad\u30e3\u30f3\u30bb\u30ea\u30f3\u30b0\u30d8\u30c3\u30c9\u30d5\u30a9\u30f3\uff08\u9ad8SNR\u304c\u5fc5\u8981\uff09<\/li>\n\n\n\n
  • \u4f1a\u8b70\u7528\u30de\u30a4\u30af\uff08\u4f4e\u30ce\u30a4\u30ba\u3001\u5b89\u5b9a\u3057\u305f\u51fa\u529b\uff09<\/li>\n\n\n\n
  • \u30b9\u30c8\u30ea\u30fc\u30de\u30fc\u307e\u305f\u306f\u30d6\u30ed\u30fc\u30c9\u30ad\u30e3\u30b9\u30bf\u30fc\u30de\u30a4\u30af\uff08\u9ad8\u5fe0\u5b9f\u5ea6\u3001\u9ad8AOP\uff09<\/li>\n<\/ul>\n\n\n
    \n
    \"2\u7aef\u5b50\u30683\u7aef\u5b50\u306e\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30de\u30a4\u30af\u30ed\u30db\u30f3\u7528\u30cf\u30f3\u30c0\u30d1\u30c3\u30c9\u306e\u6bd4\u8f03\"
    \u56f31\uff1a2\u7aef\u5b50\uff08\u5de6\uff09\u30683\u7aef\u5b50\uff08\u53f3\uff09\u306e\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306e\u30cf\u30f3\u30c0\u30d1\u30c3\u30c9\uff08\u5bf8\u6cd5\u6982\u7565\u56f3\uff09\u3002.<\/figcaption><\/figure>\n<\/div>\n\n\n

    \u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u3068\u96fb\u5727\u304c\u91cd\u8981\u306a\u7406\u7531<\/h2>\n\n\n\n

    \u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u306f\u3001\u30de\u30a4\u30af\u30ed\u30db\u30f3\u3068\u4e0b\u6d41\u306e\u56de\u8def\u3068\u306e\u76f8\u4e92\u4f5c\u7528\u306b\u5f71\u97ff\u3059\u308b\u3002\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u306e\u4f4e\u3044\u30de\u30a4\u30af\u306f\u3001\u4fe1\u53f7\u30ed\u30b9\u3092\u6291\u3048\u306a\u304c\u3089\u9577\u3044\u30b1\u30fc\u30d6\u30eb\u3092\u99c6\u52d5\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u3001\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u306e\u9ad8\u3044\u30de\u30a4\u30af\u306f\u77ed\u3044\u63a5\u7d9a\u306b\u9069\u3057\u3066\u3044\u308b\u3002.<\/p>\n\n\n\n

    \u52d5\u4f5c\u96fb\u5727\u306f\u5185\u90e8 FET \u306e\u52d5\u4f5c\u3092\u5236\u5fa1\u3059\u308b\u30022\u7aef\u5b50\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306f\u901a\u5e38\u3001\u4fe1\u53f7\u30e9\u30a4\u30f3\u304b\u3089\u4f9b\u7d66\u3055\u308c\u308b\u5185\u8535FET\u306b\u4f9d\u5b58\u3057\u3066\u3044\u307e\u3059\u30023\u7aef\u5b50\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306f\u30d0\u30a4\u30a2\u30b9\u96fb\u6e90\u3092\u5206\u96e2\u3059\u308b\u3053\u3068\u3067\u3001\u56de\u8def\u30de\u30c3\u30c1\u30f3\u30b0\u3092\u6539\u5584\u3057\u3001\u3088\u308a\u67d4\u8edf\u306a\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u53ef\u80fd\u306b\u3057\u307e\u3059\u3002.<\/p>\n\n\n\n

    2\u7aef\u5b50\u30de\u30a4\u30af\u30683\u7aef\u5b50\u30de\u30a4\u30af\u306e\u9078\u629e<\/h2>\n\n\n\n
      \n
    • 2\u7aef\u5b50\uff1a<\/strong> \u5b9f\u88c5\u304c\u5bb9\u6613\u3001\u6a19\u6e96\u96fb\u5727\uff081.5-2V\uff09\u3001\u6a19\u6e96\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b92K\u03a9\u3001\u6c4e\u7528\u6a5f\u5668\u306b\u6700\u9069\u3002.<\/li>\n\n\n\n
    • 3\u7aef\u5b50\uff1a<\/strong> \u30d5\u30ec\u30ad\u30b7\u30d6\u30eb\u306a\u96fb\u5727\uff081.5-5V\uff09\u3001\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9680\u03a9-1K\u03a9\u30b3\u30e2\u30f3\u3001550\u03a9\/2.2K\u03a9\u30ec\u30a2\u3001\u9ad8\u5fe0\u5b9f\u5ea6\u304c\u8981\u6c42\u3055\u308c\u308b\u9ad8\u6027\u80fd\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u6700\u9069\u3002.<\/li>\n<\/ul>\n\n\n\n

      \u307e\u3068\u3081<\/h2>\n\n\n\n

      \u30bf\u30fc\u30df\u30ca\u30eb\u6570\u304c\u307e\u305a\u76ee\u306b\u898b\u3048\u308b\u9055\u3044\u3060\u304c\u3001\u672c\u5f53\u306e\u9055\u3044\u306f\u6b21\u306e\u70b9\u306b\u3042\u308b\u3002 \u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u3001\u4f7f\u7528\u96fb\u5727\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u67d4\u8edf\u6027<\/strong>. .2\u7aef\u5b50\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306f\u6a19\u6e96\u7684\u306a\u30b3\u30f3\u30b7\u30e5\u30fc\u30de\u30fc\u88fd\u54c1\u306b\u9069\u3057\u3066\u3044\u307e\u3059\u304c\u30013\u7aef\u5b50\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306f\u9ad8\u6027\u80fd\u3001\u9ad8\u5fe0\u5b9f\u5ea6\u306e\u30b7\u30ca\u30ea\u30aa\u306b\u512a\u308c\u3066\u3044\u307e\u3059\u3002.<\/p>","protected":false},"excerpt":{"rendered":"

      Electret microphones can be broadly classified by terminal type, typically into 2-terminal and 3-terminal designs. The most visible difference is the number of solder pads, but more important distinctions lie in their impedance and working voltage. Typical Impedance and Voltage Terminal Type Common Impedance Less Common Impedance Typical Voltage 2-Terminal 2K\u03a9 \u2014 1.5V, 2V 3-Terminal 1K\u03a9, 680\u03a9 550\u03a9, 2.2K\u03a9 1.5V, 2V, 3V, up to 5V 2-Terminal Electret Microphones Most 2-terminal microphones have a fixed impedance of 2K\u03a9 and operate typically at 2V, with some low-voltage models at 1.5V. These microphones are easy to use, requiring only two connections for power and signal. The fixed impedance limits flexibility for circuit matching. For more information on 2-terminal […]<\/p>\n","protected":false},"author":1,"featured_media":4053,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[401],"tags":[722,723],"class_list":["post-4046","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-component-comparisons","tag-electret-microphones","tag-terminal-type"],"_links":{"self":[{"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/posts\/4046","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=4046"}],"version-history":[{"count":7,"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/posts\/4046\/revisions"}],"predecessor-version":[{"id":4065,"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/posts\/4046\/revisions\/4065"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/media\/4053"}],"wp:attachment":[{"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/media?parent=4046"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/categories?post=4046"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/tags?post=4046"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}