{"id":3207,"date":"2025-08-01T16:56:11","date_gmt":"2025-08-01T08:56:11","guid":{"rendered":"https:\/\/ecmicrophones.com\/?p=3207"},"modified":"2026-01-27T16:30:25","modified_gmt":"2026-01-27T08:30:25","slug":"electret-microphone-capsule-self-noise-testing","status":"publish","type":"post","link":"https:\/\/ecmicrophones.com\/ja\/electret-microphone-capsule-self-noise-testing\/","title":{"rendered":"\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30fb\u30de\u30a4\u30af\u30ed\u30db\u30f3\u30fb\u30ab\u30d7\u30bb\u30eb\u306e\u81ea\u5df1\u96d1\u97f3\u8a66\u9a13"},"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\/08\/electret-mic-noise-floor-optimization.png\" alt=\"\u30ce\u30a4\u30ba\u30d5\u30ed\u30a2\u6700\u9069\u5316\u30a4\u30e9\u30b9\u30c8\u4ed8\u304d\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30fb\u30de\u30a4\u30af\u30ed\u30db\u30f3\u30fb\u30ab\u30d7\u30bb\u30eb\" class=\"wp-image-3212\" srcset=\"https:\/\/ecmicrophones.com\/wp-content\/uploads\/2025\/08\/electret-mic-noise-floor-optimization.png 925w, https:\/\/ecmicrophones.com\/wp-content\/uploads\/2025\/08\/electret-mic-noise-floor-optimization-300x175.png 300w, https:\/\/ecmicrophones.com\/wp-content\/uploads\/2025\/08\/electret-mic-noise-floor-optimization-768x448.png 768w, https:\/\/ecmicrophones.com\/wp-content\/uploads\/2025\/08\/electret-mic-noise-floor-optimization-18x12.png 18w, https:\/\/ecmicrophones.com\/wp-content\/uploads\/2025\/08\/electret-mic-noise-floor-optimization-600x350.png 600w\" sizes=\"auto, (max-width: 925px) 100vw, 925px\" \/><figcaption 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class=\"wp-block-list\">\n<li><strong>JFET\u30d7\u30ea\u30a2\u30f3\u30d7\u306e\u30ce\u30a4\u30ba\uff1a<\/strong><br>\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30fb\u30de\u30a4\u30af\u30ed\u30db\u30f3\u30fb\u30ab\u30d7\u30bb\u30eb\u306f\u901a\u5e38\u3001\u5185\u8535\u30d7\u30ea\u30a2\u30f3\u30d7\u3068\u3057\u3066JFET\uff08\u63a5\u5408\u578b\u96fb\u754c\u52b9\u679c\u30c8\u30e9\u30f3\u30b8\u30b9\u30bf\uff09\u3092\u5185\u8535\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u90e8\u54c1\u306f\u71b1\u96d1\u97f3\u3001\u30b7\u30e7\u30c3\u30c8\u96d1\u97f3\u3001\u30d5\u30ea\u30c3\u30ab\u30fc\uff081\/f\uff09\u96d1\u97f3\u3092\u767a\u751f\u3055\u305b\u3001\u3053\u308c\u3089\u306f\u5168\u4f53\u7684\u306a\u81ea\u5df1\u96d1\u97f3\u306e\u4e3b\u306a\u539f\u56e0\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u7d20\u6750\u306e\u30ce\u30a4\u30ba\uff1a<\/strong><br>\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u819c\u306f\u6c38\u4e45\u96fb\u8377\u3092\u4fdd\u6301\u3059\u308b\u304c\u3001\u96fb\u8377\u306e\u6f0f\u308c\u3084\u4e0d\u5b89\u5b9a\u3055\u306b\u3088\u3063\u3066\u308f\u305a\u304b\u306b\u5909\u52d5\u3057\u3001\u8efd\u5fae\u306a\u30ce\u30a4\u30ba\u3092\u3082\u305f\u3089\u3059\u3053\u3068\u304c\u3042\u308b\u3002\u3057\u304b\u3057\u3001JFET\u306e\u30ce\u30a4\u30ba\u306b\u6bd4\u3079\u308c\u3070\u3001\u4e00\u822c\u7684\u306b\u305d\u308c\u307b\u3069\u5927\u304d\u306a\u3082\u306e\u3067\u306f\u306a\u3044\u3002<\/li>\n\n\n\n<li><strong>\u96fb\u6e90\u30ce\u30a4\u30ba\u30fb\u30ab\u30c3\u30d7\u30ea\u30f3\u30b0\uff1a<\/strong><br>\u96fb\u6e90\u30e9\u30a4\u30f3\u306e\u96fb\u5727\u5909\u52d5\u3084\u30ce\u30a4\u30ba\u306f\u3001\u30ab\u30d7\u30bb\u30eb\u51fa\u529b\u306b\u30ab\u30c3\u30d7\u30ea\u30f3\u30b0\u3057\u3001\u30bb\u30eb\u30d5\u30ce\u30a4\u30ba\u30ec\u30d9\u30eb\u3092\u5897\u52a0\u3055\u305b\u307e\u3059\u3002\u6e2c\u5b9a\u4e2d\u306f\u3001\u30af\u30ea\u30fc\u30f3\u3067\u5b89\u5b9a\u3057\u305f\u96fb\u6e90\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/li>\n<\/ol>\n\n\n\n<h2 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href=\"https:\/\/ecmicrophones.com\/ja\/contact-us\/\" data-type=\"page\" data-id=\"30\">\u304a\u554f\u3044\u5408\u308f\u305b<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"<p>Electret microphone capsules are widely used in various audio applications due to their compact size and reliable performance. However, like all active electronic components, these capsules generate inherent&nbsp;self-noise&nbsp;\u2014 a low-level electrical signal present even in complete silence. Understanding and accurately measuring this self-noise is critical for assessing microphone quality, optimizing product design, and ensuring excellent audio clarity in the final application. Sources of Self-Noise Key Testing Conditions Practical Implications Self-noise sets the lower limit of the microphone&#8217;s dynamic range \u2014 the smallest sound it can detect over its inherent noise floor. For example, a self-noise level of -60 dBV means the microphone can detect signals 60 dB above its noise [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":3212,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[551],"class_list":["post-3207","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technical-insights","tag-low-noise-jfet"],"_links":{"self":[{"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/posts\/3207","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=3207"}],"version-history":[{"count":0,"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/posts\/3207\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/media\/3212"}],"wp:attachment":[{"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/media?parent=3207"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/categories?post=3207"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/tags?post=3207"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}