{"id":4327,"date":"2026-08-18T14:37:55","date_gmt":"2026-08-18T06:37:55","guid":{"rendered":"https:\/\/ecmicrophones.com\/?p=4327"},"modified":"2026-08-18T14:43:37","modified_gmt":"2026-08-18T06:43:37","slug":"microphone-frequency-response-sensitivity-standards","status":"publish","type":"post","link":"https:\/\/ecmicrophones.com\/ja\/microphone-frequency-response-sensitivity-standards\/","title":{"rendered":"\u30de\u30a4\u30af\u30ed\u30d5\u30a9\u30f3\u306e\u5468\u6ce2\u6570\u7279\u6027\u3068\u611f\u5ea6\u898f\u683c\u306b\u3064\u3044\u3066"},"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\/2026\/08\/engineer-testing-microphone-bk-equipment.png\" alt=\"B&amp;K\u306e\u97f3\u97ff\u6e2c\u5b9a\u6a5f\u5668\u3092\u4f7f\u7528\u3057\u3066\u3001\u30de\u30a4\u30af\u30ed\u30d5\u30a9\u30f3\u306e\u5468\u6ce2\u6570\u7279\u6027\u3092\u6e2c\u5b9a\u3057\u3066\u3044\u308b\u30a8\u30f3\u30b8\u30cb\u30a2\" class=\"wp-image-4328\" srcset=\"https:\/\/ecmicrophones.com\/wp-content\/uploads\/2026\/08\/engineer-testing-microphone-bk-equipment.png 925w, https:\/\/ecmicrophones.com\/wp-content\/uploads\/2026\/08\/engineer-testing-microphone-bk-equipment-300x175.png 300w, https:\/\/ecmicrophones.com\/wp-content\/uploads\/2026\/08\/engineer-testing-microphone-bk-equipment-768x448.png 768w, https:\/\/ecmicrophones.com\/wp-content\/uploads\/2026\/08\/engineer-testing-microphone-bk-equipment-18x12.png 18w, https:\/\/ecmicrophones.com\/wp-content\/uploads\/2026\/08\/engineer-testing-microphone-bk-equipment-600x350.png 600w\" sizes=\"auto, (max-width: 925px) 100vw, 925px\" \/><figcaption class=\"wp-element-caption\"><em>ECMIC\u7814\u7a76\u6240\u306b\u304a\u3051\u308b\u30de\u30a4\u30af\u30ed\u30d5\u30a9\u30f3\u306e\u8a66\u9a13<\/em><\/figcaption><\/figure>\n<\/div>\n\n\n<div class=\"wp-block-rank-math-toc-block\" id=\"rank-math-toc\"><div>\u76ee\u6b21<\/div><nav><ul><li><a href=\"#1-why-does-the-b-k-frequency-response-curve-start-at-50-hz\">1. \u306a\u305cB&amp;K\u306e\u5468\u6ce2\u6570\u7279\u6027\u66f2\u7dda\u306f50Hz\u304b\u3089\u59cb\u307e\u308b\u306e\u304b\uff1f<\/a><ul><li><a href=\"#1-1-production-testing-and-laboratory-testing-have-different-purposes\">1.1 \u5b9f\u5730\u8a66\u9a13\u3068\u5b9f\u9a13\u5ba4\u8a66\u9a13\u306f\u76ee\u7684\u304c\u7570\u306a\u308b<\/a><\/li><li><a href=\"#1-2-what-does-a-flat-50-100-hz-response-tell-us\">1.2 50\uff5e100Hz\u306e\u30d5\u30e9\u30c3\u30c8\u306a\u5468\u6ce2\u6570\u7279\u6027\u304b\u3089\u4f55\u304c\u308f\u304b\u308b\u304b\uff1f<\/a><\/li><\/ul><\/li><li><a href=\"#2-why-does-one-microphone-use-36-d-b-while-another-uses-56-d-b\">2. \u306a\u305c\u3001\u3042\u308b\u30de\u30a4\u30af\u306f-36dB\u3067\u3001\u5225\u306e\u30de\u30a4\u30af\u306f-56dB\u3092\u4f7f\u3046\u306e\u3067\u3057\u3087\u3046\u304b\uff1f<\/a><ul><li><a href=\"#2-1-two-reference-systems-can-appear-in-the-market\">2.1 \u5e02\u5834\u306b\u306f2\u3064\u306e\u57fa\u6e96\u7cfb\u304c\u5b58\u5728\u3057\u3046\u308b<\/a><\/li><li><a href=\"#2-2-the-conversion-between-pa-and-\u03bcbar\">2.2 Pa \u3068 \u03bcbar \u306e\u63db\u7b97<\/a><\/li><li><a href=\"#2-3-why-can-the-older-\u03bcbar-reference-still-be-found\">2.3 \u306a\u305c\u3001\u65e7\u5f0f\u306e\u03bcbar\u57fa\u6e96\u304c\u4eca\u3067\u3082\u6b8b\u3063\u3066\u3044\u308b\u306e\u304b\uff1f<\/a><\/li><\/ul><\/li><li><a href=\"#3-always-check-the-reference-before-comparing-microphone-specifications\">3. \u30de\u30a4\u30af\u306e\u4ed5\u69d8\u3092\u6bd4\u8f03\u3059\u308b\u524d\u306b\u3001\u5fc5\u305a\u53c2\u8003\u8cc7\u6599\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044<\/a><\/li><li><a href=\"#4-what-this-means-for-oem-and-odm-projects\">4. OEM\u304a\u3088\u3073ODM\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306b\u3068\u3063\u3066\u306e\u610f\u5473<\/a><\/li><li><a href=\"#conclusion\">\u7d50\u8ad6<\/a><\/li><\/ul><\/nav><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u3055\u307e\u3056\u307e\u306a\u30e1\u30fc\u30ab\u30fc\u306e\u30de\u30a4\u30af\u306e\u4ed5\u69d8\u3092\u6bd4\u8f03\u3059\u308b\u969b\u3001\u6df7\u4e71\u3092\u62db\u304d\u304b\u306d\u306a\u3044\u70b9\u304c2\u3064\u3042\u308b\u3053\u3068\u306b\u6c17\u3065\u304f\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u307e\u305a\u3001\u3042\u308b\u30de\u30a4\u30af\u30ed\u30d5\u30a9\u30f3\u306e\u5468\u6ce2\u6570\u7279\u6027\u304c20Hz\uff5e20kHz\u3068\u898f\u5b9a\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u3001\u88fd\u9020\u8a66\u9a13\u66f2\u7dda\u304c50Hz\u304b\u3089\u59cb\u307e\u3063\u3066\u3044\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u305d\u306e\u30de\u30a4\u30af\u30ed\u30d5\u30a9\u30f3\u306b\u306f50Hz\u4ee5\u4e0b\u306e\u5468\u6ce2\u6570\u306b\u5bfe\u3059\u308b\u5fdc\u7b54\u304c\u306a\u3044\u3068\u3044\u3046\u3053\u3068\u3067\u3057\u3087\u3046\u304b\uff1f<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7b2c\u4e8c\u306b\u3001\u3042\u308b\u30e1\u30fc\u30ab\u30fc\u306f\u611f\u5ea6\u3092-36dB\u3068\u6307\u5b9a\u3057\u3066\u3044\u308b\u4e00\u65b9\u3067\u3001\u5225\u306e\u30e1\u30fc\u30ab\u30fc\u306f-56dB\u3068\u6307\u5b9a\u3057\u3066\u3044\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e20dB\u306e\u5dee\u306f\u3001\u4e00\u65b9\u306e\u30de\u30a4\u30af\u306e\u65b9\u304c\u8457\u3057\u304f\u611f\u5ea6\u304c\u9ad8\u3044\u3053\u3068\u3092\u610f\u5473\u3059\u308b\u306e\u3067\u3057\u3087\u3046\u304b\uff1f<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3069\u3061\u3089\u306e\u5834\u5408\u3082\u3001\u305d\u306e\u9055\u3044\u306f\u591a\u304f\u306e\u5834\u5408\u3001\u30de\u30a4\u30af\u306e\u30c6\u30b9\u30c8\u65b9\u6cd5\u3084\u4ed5\u69d8\u306e\u8868\u8a18\u65b9\u6cd5\u306b\u8d77\u56e0\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u8a73\u7d30\u3092\u7406\u89e3\u3057\u3066\u304a\u304f\u3053\u3068\u3067\u3001\u30de\u30a4\u30af\u306e\u4ed5\u69d8\u3092\u6b63\u3057\u304f\u6bd4\u8f03\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u3001OEM\u3084ODM\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306b\u304a\u3051\u308b\u4e0d\u5fc5\u8981\u306a\u6df7\u4e71\u3092\u907f\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002.<\/p>\n\n\n\n<h2 id=\"1-why-does-the-b-k-frequency-response-curve-start-at-50-hz\" class=\"wp-block-heading\">1. \u306a\u305cB&amp;K\u306e\u5468\u6ce2\u6570\u7279\u6027\u66f2\u7dda\u306f50Hz\u304b\u3089\u59cb\u307e\u308b\u306e\u304b\uff1f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u591a\u304f\u306eECMIC\u5168\u65b9\u5411\u6027ECM\u306f\u3001\u6bd4\u8f03\u7684\u5e73\u5766\u3067\u5e83\u3044\u5468\u6ce2\u6570\u7279\u6027\u3092\u6301\u3064\u3088\u3046\u306b\u8a2d\u8a08\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u305d\u306e\u4ed5\u69d8\u306f\u300120Hz\uff5e20kHz\u3068\u3044\u3063\u305f\u7bc4\u56f2\u3092\u30ab\u30d0\u30fc\u3057\u3066\u3044\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3057\u304b\u3057\u3001\u5b9f\u969b\u306e\u5468\u6ce2\u6570\u7279\u6027\u30ec\u30dd\u30fc\u30c8\u3092\u898b\u308b\u3068\u3001\u66f2\u7dda\u304c20Hz\u3067\u306f\u306a\u304f50Hz\u304b\u3089\u59cb\u307e\u3063\u3066\u3044\u308b\u3053\u3068\u306b\u6c17\u3065\u304f\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002\u3053\u308c\u306f\u300150Hz\u4ee5\u4e0b\u3067\u306f\u30de\u30a4\u30af\u304c\u53cd\u5fdc\u3057\u306a\u304f\u306a\u308b\u3068\u3044\u3046\u610f\u5473\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002.<\/p>\n\n\n\n<h3 id=\"1-1-production-testing-and-laboratory-testing-have-different-purposes\" class=\"wp-block-heading\">1.1 \u5b9f\u5730\u8a66\u9a13\u3068\u5b9f\u9a13\u5ba4\u8a66\u9a13\u306f\u76ee\u7684\u304c\u7570\u306a\u308b<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">ECMIC\u3067\u306f\u3001\u30de\u30a4\u30af\u30ed\u30d5\u30a9\u30f3\u306e\u6027\u80fd\u8a66\u9a13\u306b\u3001B&amp;K\uff08Br\u00fcel &amp; Kj\u00e6r\uff09\u88fd\u306e\u696d\u52d9\u7528\u97f3\u97ff\u8a66\u9a13\u30b7\u30b9\u30c6\u30e0\u3092\u63a1\u7528\u3057\u3066\u3044\u307e\u3059\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u91cf\u7523\u306b\u304a\u3044\u3066\u306f\u3001\u6e2c\u5b9a\u74b0\u5883\u306f\u3001\u5b89\u5b9a\u6027\u3001\u518d\u73fe\u6027\u3001\u304a\u3088\u3073\u52b9\u7387\u6027\u306b\u512a\u308c\u305f\u6e2c\u5b9a\u304c\u884c\u3048\u308b\u3088\u3046\u6700\u9069\u5316\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u4f4e\u5468\u6ce2\u6570\u306e\u6e2c\u5b9a\u306f\u3001\u6a5f\u68b0\u7684\u632f\u52d5\u3001\u88c5\u7f6e\u306e\u9a12\u97f3\u3001\u63db\u6c17\u30b7\u30b9\u30c6\u30e0\u3001\u305d\u306e\u4ed6\u306e\u74b0\u5883\u8981\u56e0\u306e\u5f71\u97ff\u3092\u53d7\u3051\u3084\u3059\u3044\u50be\u5411\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u305f\u3081\u3001\u901a\u5e38\u306e\u751f\u7523\u8a66\u9a13\u306b\u4f7f\u7528\u3055\u308c\u308b\u5468\u6ce2\u6570\u7bc4\u56f2\u306f50Hz\u304b\u3089\u59cb\u307e\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u306a\u304a\u3001\u3053\u306e\u751f\u7523\u8a66\u9a13\u7bc4\u56f2\u3092\u3001\u30de\u30a4\u30af\u81ea\u4f53\u306e\u7d76\u5bfe\u7684\u306a\u5468\u6ce2\u6570\u7279\u6027\u306e\u9650\u754c\u3068\u89e3\u91c8\u3057\u3066\u306f\u306a\u308a\u307e\u305b\u3093\u3002.<\/p>\n\n\n\n<h3 id=\"1-2-what-does-a-flat-50-100-hz-response-tell-us\" class=\"wp-block-heading\">1.2 50\uff5e100Hz\u306e\u30d5\u30e9\u30c3\u30c8\u306a\u5468\u6ce2\u6570\u7279\u6027\u304b\u3089\u4f55\u304c\u308f\u304b\u308b\u304b\uff1f<\/h3>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"397\" height=\"284\" src=\"https:\/\/ecmicrophones.com\/wp-content\/uploads\/2024\/03\/typical-frequency-response_ecm-b5820al36-522.png\" alt=\"ECMIC\u5168\u65b9\u5411\u6027ECM\u306e\u5178\u578b\u7684\u306a\u5468\u6ce2\u6570\u7279\u6027\u66f2\u7dda\u300250Hz\u304b\u308920kHz\u307e\u3067\u30d5\u30e9\u30c3\u30c8\u306a\u7279\u6027\u304c\u793a\u3055\u308c\u3066\u3044\u308b\u3002\" class=\"wp-image-268\" srcset=\"https:\/\/ecmicrophones.com\/wp-content\/uploads\/2024\/03\/typical-frequency-response_ecm-b5820al36-522.png 397w, https:\/\/ecmicrophones.com\/wp-content\/uploads\/2024\/03\/typical-frequency-response_ecm-b5820al36-522-300x215.png 300w, https:\/\/ecmicrophones.com\/wp-content\/uploads\/2024\/03\/typical-frequency-response_ecm-b5820al36-522-18x12.png 18w\" sizes=\"auto, (max-width: 397px) 100vw, 397px\" \/><figcaption class=\"wp-element-caption\"><em>\u6a19\u6e96\u7684\u306a\u5468\u6ce2\u6570\u7279\u6027\u66f2\u7dda\uff0850Hz\uff5e20kHz\uff09<\/em><\/figcaption><\/figure>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\">\u6bd4\u8f03\u7684\u5e73\u5766\u306a\u5468\u6ce2\u6570\u7279\u6027\u3092\u6301\u3064\u3088\u3046\u306b\u8a2d\u8a08\u3055\u308c\u305f\u5168\u65b9\u5411\u6027ECM\u306e\u5834\u5408\u3001\u4f4e\u5468\u6ce2\u6570\u57df\u306e\u7279\u6027\u306f\u901a\u5e38\u3001\u7279\u5b9a\u306e\u5468\u6ce2\u6570\u3067\u6025\u6fc0\u306b\u9014\u5207\u308c\u308b\u306e\u3067\u306f\u306a\u304f\u3001\u5f90\u3005\u306b\u5909\u5316\u3057\u3066\u3044\u304f\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">ECMIC\u306e\u9577\u5e74\u306b\u308f\u305f\u308b\u88fd\u9020\u304a\u3088\u3073\u97f3\u97ff\u8a66\u9a13\u306e\u7d4c\u9a13\u306b\u57fa\u3065\u304f\u3068\u3001\u5fdc\u7b54\u66f2\u7dda\u304c\u304a\u3088\u305d50Hz\u304b\u3089100Hz\u306e\u7bc4\u56f2\u3067\u5b89\u5b9a\u3057\u3066\u5e73\u5766\u306a\u72b6\u614b\u3092\u7dad\u6301\u3057\u3066\u3044\u308b\u5834\u5408\u3001\u305d\u308c\u306f\u4e00\u822c\u7684\u306b\u3001\u305d\u306e\u30de\u30a4\u30af\u30ed\u30d5\u30a9\u30f3\u306e\u4f4e\u5468\u6ce2\u6570\u5fdc\u7b54\u304c\u3053\u306e\u7bc4\u56f2\u3092\u306f\u308b\u304b\u306b\u4e0b\u56de\u308b\u307e\u3067\u4f38\u3073\u3066\u3044\u308b\u3053\u3068\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b9f\u969b\u306e\u5236\u4f5c\u73fe\u5834\u3067\u306e\u7d4c\u9a13\u4e0a\u3001\u3053\u306e\u7a2e\u306e\u5468\u6ce2\u6570\u7279\u6027\u3092\u6301\u3064\u30de\u30a4\u30af\u306f\u3001\u901a\u5e38\u300120\uff5e50Hz\u306e\u5e2f\u57df\u306b\u304a\u3044\u3066\u3082\u5b89\u5b9a\u3057\u305f\u5468\u6ce2\u6570\u7279\u6027\u3092\u7dad\u6301\u3057\u3066\u3044\u307e\u3059\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u308c\u306f\u3001\u9577\u5e74\u306e\u751f\u7523\u7d4c\u9a13\u306b\u57fa\u3065\u3044\u305f\u6280\u8853\u7684\u306a\u5224\u65ad\u3067\u3059\u3002\u3059\u3079\u3066\u306e\u5468\u6ce2\u6570\u70b9\u306b\u304a\u3051\u308b\u76f4\u63a5\u6e2c\u5b9a\u306e\u4ee3\u308f\u308a\u3068\u89e3\u91c8\u3059\u3079\u304d\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002.<\/p>\n\n\n\n<h2 id=\"2-why-does-one-microphone-use-36-d-b-while-another-uses-56-d-b\" class=\"wp-block-heading\">2. \u306a\u305c\u3001\u3042\u308b\u30de\u30a4\u30af\u306f-36dB\u3067\u3001\u5225\u306e\u30de\u30a4\u30af\u306f-56dB\u3092\u4f7f\u3046\u306e\u3067\u3057\u3087\u3046\u304b\uff1f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u3082\u3046\u3072\u3068\u3064\u3088\u304f\u8aa4\u89e3\u3055\u308c\u308b\u306e\u304c\u3001\u30de\u30a4\u30af\u306e\u611f\u5ea6\u3067\u3059\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7570\u306a\u308b\u30e1\u30fc\u30ab\u30fc\u306e\u4ed5\u69d8\u3092\u6bd4\u8f03\u3059\u308b\u969b\u3001\u300c-36dB\u300d\u300c-44dB\u300d\u300c-54dB\u300d\u300c-56dB\u300d\u3068\u3044\u3063\u305f\u6570\u5024\u304c\u898b\u3089\u308c\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u6570\u5024\u306f\u3001\u611f\u5ea6\u4ed5\u69d8\u306b\u4f7f\u7528\u3055\u308c\u3066\u3044\u308b\u57fa\u6e96\u5727\u529b\u3092\u3042\u3089\u304b\u3058\u3081\u78ba\u8a8d\u3057\u306a\u3044\u9650\u308a\u3001\u76f4\u63a5\u6bd4\u8f03\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3002.<\/p>\n\n\n\n<h3 id=\"2-1-two-reference-systems-can-appear-in-the-market\" class=\"wp-block-heading\">2.1 \u5e02\u5834\u306b\u306f2\u3064\u306e\u57fa\u6e96\u7cfb\u304c\u5b58\u5728\u3057\u3046\u308b<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e00\u822c\u7684\u306a\u73fe\u4ee3\u306e\u30de\u30a4\u30af\u30ed\u30d5\u30a9\u30f3\u306e\u4ed5\u69d8\u3067\u306f\u3001\u611f\u5ea6\u306f1V\/Pa\u3092\u57fa\u6e96\u3068\u3057\u3066\u8868\u3055\u308c\u307e\u3059\u3002\u4e00\u90e8\u306e\u53e4\u3044\u4ed5\u69d8\u3067\u306f\u30011V\/\u03bcbar\u3092\u57fa\u6e96\u3068\u3057\u3066\u3044\u308b\u5834\u5408\u3082\u3042\u308a\u307e\u3059\u3002.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u73fe\u4ee3\u306b\u304a\u3051\u308b\u4e00\u822c\u7684\u306a\u53c2\u7167\u4f8b\uff1a<\/strong>\u00a0dB\uff08\u57fa\u6e96\u96fb\u5727 1V\/Pa\uff09<\/li>\n\n\n\n<li><strong>\u5f93\u6765\u306e\u8868\u8a18\uff1a<\/strong>\u00a01V\/\u03bcbar\u3092\u57fa\u6e96\u3068\u3057\u305fdB<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u308c\u30892\u3064\u306e\u5024\u306e\u5dee\u306f\u3001\u5b9f\u969b\u306e\u30de\u30a4\u30af\u30ed\u30db\u30f3\u51fa\u529b\u306b20dB\u3082\u306e\u6025\u6fc0\u306a\u5dee\u304c\u751f\u3058\u305f\u3053\u3068\u306b\u3088\u308b\u3082\u306e\u3067\u306f\u306a\u304f\u3001\u57fa\u6e96\u5727\u529b\u306b\u3088\u308b\u3082\u306e\u3067\u3059\u3002.<\/p>\n\n\n\n<h3 id=\"2-2-the-conversion-between-pa-and-\u03bcbar\" class=\"wp-block-heading\">2.2 Pa \u3068 \u03bcbar \u306e\u63db\u7b97<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u308c\u30892\u3064\u306e\u5727\u529b\u5358\u4f4d\u306e\u95a2\u4fc2\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>1 Pa = 10 \u03bcbar<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5727\u529b\u306e10\u500d\u306f20dB\u306b\u76f8\u5f53\u3059\u308b\u305f\u3081\u3001\u611f\u5ea6\u306e\u5024\u306f\u6b21\u306e\u3088\u3046\u306b\u63db\u7b97\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>dB re 1V\/Pa = dB re 1V\/\u03bcbar + 20dB<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f8b\u3048\u3070\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>-56dB\uff081V\/\u03bcbar\u3092\u57fa\u6e96\uff09= -36dB\uff081V\/Pa\u3092\u57fa\u6e96\uff09<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">OEM\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306b\u304a\u3044\u3066\u3001\u65e2\u5b58\u306e\u30de\u30a4\u30af\u30ed\u30d5\u30a9\u30f3\u306e\u90e8\u54c1\u8868\uff08BOM\uff09\u306b\u306f\u300c-56dB re 1V\/\u03bcbar\u300d\u3068\u3044\u3046\u611f\u5ea6\u304c\u8a18\u8f09\u3055\u308c\u3066\u3044\u308b\u4e00\u65b9\u3067\u3001\u65b0\u3057\u3044\u30b5\u30d7\u30e9\u30a4\u30e4\u30fc\u304c\u63d0\u793a\u3059\u308b\u4ed5\u69d8\u306f\u300c-36dB re 1V\/Pa\u300d\u3068\u306a\u3063\u3066\u3044\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u30892\u3064\u306e\u5024\u306f\u3001\u540c\u3058\u611f\u5ea6\u30ec\u30d9\u30eb\u3092\u8868\u3057\u3066\u3044\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e20dB\u306e\u5dee\u306f\u3001\u57fa\u6e96\u5727\u529b\u306e\u9055\u3044\u306b\u3088\u308b\u3082\u306e\u3067\u3042\u308a\u3001\u30de\u30a4\u30af\u30ed\u30d5\u30a9\u30f3\u306e\u5b9f\u969b\u306e\u611f\u5ea6\u306e\u9055\u3044\u306b\u3088\u308b\u3082\u306e\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002.<\/p>\n\n\n\n<h3 id=\"2-3-why-can-the-older-\u03bcbar-reference-still-be-found\" class=\"wp-block-heading\">2.3 \u306a\u305c\u3001\u65e7\u5f0f\u306e\u03bcbar\u57fa\u6e96\u304c\u4eca\u3067\u3082\u6b8b\u3063\u3066\u3044\u308b\u306e\u304b\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">1V\/\u03bcbar\u3068\u3044\u3046\u57fa\u6e96\u306f\u3001\u73fe\u4ee3\u306e\u56fd\u969b\u7684\u306a\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306e\u4ed5\u69d8\u3067\u306f\u3042\u307e\u308a\u4e00\u822c\u7684\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u5b8c\u5168\u306b\u59ff\u3092\u6d88\u3057\u305f\u308f\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e00\u90e8\u306e\u5927\u624b\u97f3\u97ff\u6a5f\u5668\u30e1\u30fc\u30ab\u30fc\u3001\u7279\u306b\u65e7\u5f0f\u306e\u88fd\u54c1\u8a2d\u8a08\u3001\u30ec\u30ac\u30b7\u30fc\u306a\u90e8\u54c1\u8868\uff08BOM\uff09\u3001\u3042\u308b\u3044\u306f\u904e\u53bb\u306e\u8a66\u9a13\u4ed5\u69d8\u66f8\u306b\u57fa\u3065\u3044\u3066\u4e8b\u696d\u3092\u884c\u3063\u3066\u3044\u308b\u4f01\u696d\u306e\u4e2d\u306b\u306f\u3001\u4f9d\u7136\u3068\u3057\u3066\u5f93\u6765\u306e\u03bcbar\u3092\u57fa\u6e96\u3068\u3057\u305f\u611f\u5ea6\u57fa\u6e96\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u3068\u3053\u308d\u3082\u3042\u308b\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">OEM\u9867\u5ba2\u304c\u3001\u65b0\u898f\u30b5\u30d7\u30e9\u30a4\u30e4\u30fc\u306e\u4ed5\u69d8\u3068\u65e2\u5b58\u306e\u30de\u30a4\u30af\u30ed\u30d5\u30a9\u30f3\u306e\u4ed5\u69d8\u3092\u6bd4\u8f03\u3059\u308b\u969b\u3001\u3053\u308c\u304c\u6df7\u4e71\u3092\u62db\u304f\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u57fa\u6e96\u7cfb\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u30a8\u30f3\u30b8\u30cb\u30a2\u3084\u8cfc\u8cb7\u62c5\u5f53\u8005\u306f\u3001\u88fd\u54c1\u3092\u6bd4\u8f03\u3057\u305f\u308a\u30b5\u30f3\u30d7\u30eb\u3092\u627f\u8a8d\u3057\u305f\u308a\u3059\u308b\u524d\u306b\u3001\u4ed5\u69d8\u3092\u7d71\u4e00\u3057\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002.<\/p>\n\n\n\n<h2 id=\"3-always-check-the-reference-before-comparing-microphone-specifications\" class=\"wp-block-heading\">3. \u30de\u30a4\u30af\u306e\u4ed5\u69d8\u3092\u6bd4\u8f03\u3059\u308b\u524d\u306b\u3001\u5fc5\u305a\u53c2\u8003\u8cc7\u6599\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u7570\u306a\u308b\u30e1\u30fc\u30ab\u30fc\u306e\u30de\u30a4\u30af\u306e\u4ed5\u69d8\u3092\u6bd4\u8f03\u3059\u308b\u969b\u3001\u6570\u5024\u3060\u3051\u3092\u898b\u3066\u5224\u65ad\u3059\u308b\u306e\u306f\u4e0d\u5341\u5206\u3067\u3059\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5468\u6ce2\u6570\u7279\u6027\u306b\u3064\u3044\u3066\u306f\u3001\u8a66\u9a13\u5bfe\u8c61\u306e\u5468\u6ce2\u6570\u7bc4\u56f2\u3092\u78ba\u8a8d\u3057\u3001\u305d\u306e\u7279\u6027\u66f2\u7dda\u304c\u901a\u5e38\u306e\u751f\u7523\u8a66\u9a13\u306b\u3088\u308b\u3082\u306e\u304b\u3001\u305d\u308c\u3068\u3082\u5b9f\u9a13\u5ba4\u3067\u306e\u672c\u683c\u7684\u306a\u6e2c\u5b9a\u306b\u3088\u308b\u3082\u306e\u304b\u3092\u628a\u63e1\u3057\u3066\u304f\u3060\u3055\u3044\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u611f\u5ea6\u306b\u3064\u3044\u3066\u306f\u3001dB\u5024\u3092\u6bd4\u8f03\u3059\u308b\u524d\u306b\u3001\u5fc5\u305a\u57fa\u6e96\u5727\u529b\u3068\u5358\u4f4d\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u4ed5\u69d8<\/th><th>\u53c2\u8003<\/th><th>\u4f8b<\/th><\/tr><\/thead><tbody><tr><td>\u73fe\u4ee3\u306b\u304a\u3051\u308b\u4e00\u822c\u7684\u306a\u611f\u5ea6\u57fa\u6e96<\/td><td>1V\/Pa<\/td><td>-36dB\uff081V\/Pa\u3092\u57fa\u6e96\u3068\u3057\u3066\uff09<\/td><\/tr><tr><td>\u5f93\u6765\u306e\u611f\u5ea6\u57fa\u6e96<\/td><td>1V\/\u03bcbar<\/td><td>-56dB\uff081V\/\u03bcbar\u3092\u57fa\u6e96\uff09<\/td><\/tr><tr><td>\u5909\u63db<\/td><td>1 Pa = 10 \u03bcbar<\/td><td>-56dB\uff081V\/\u03bcbar\u3092\u57fa\u6e96\uff09= -36dB\uff081V\/Pa\u3092\u57fa\u6e96\uff09<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 id=\"4-what-this-means-for-oem-and-odm-projects\" class=\"wp-block-heading\">4. OEM\u304a\u3088\u3073ODM\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306b\u3068\u3063\u3066\u306e\u610f\u5473<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u30de\u30a4\u30af\u30e1\u30fc\u30ab\u30fc\u3054\u3068\u306e\u4ed5\u69d8\u306e\u9055\u3044\u306f\u3001\u5fc5\u305a\u3057\u3082\u5b9f\u969b\u306e\u88fd\u54c1\u6027\u80fd\u306e\u9055\u3044\u3092\u793a\u3059\u3082\u306e\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">50Hz\u304b\u3089\u59cb\u307e\u308b\u5468\u6ce2\u6570\u7279\u6027\u66f2\u7dda\u306f\u3001\u30de\u30a4\u30af\u30ed\u30d5\u30a9\u30f3\u306e\u5b9f\u969b\u306e\u4f4e\u5468\u6ce2\u6570\u6027\u80fd\u3067\u306f\u306a\u304f\u3001\u901a\u5e38\u306e\u88fd\u9020\u8a66\u9a13\u306e\u8a2d\u5b9a\u3092\u53cd\u6620\u3057\u3066\u3044\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u540c\u69d8\u306b\u3001\u611f\u5ea6\u5024\u306b20dB\u306e\u5dee\u304c\u3042\u308b\u5834\u5408\u3067\u3082\u3001\u305d\u308c\u306f\u5358\u306b\u57fa\u6e96\u97f3\u5727\u306e\u57fa\u6e96\u304c\u7570\u306a\u308b\u3053\u3068\u306b\u8d77\u56e0\u3057\u3066\u3044\u308b\u3060\u3051\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">OEM\u304a\u3088\u3073ODM\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306b\u304a\u3044\u3066\u306f\u3001\u8a66\u9a13\u6761\u4ef6\u3001\u53c2\u7167\u898f\u683c\u3001\u611f\u5ea6\u5358\u4f4d\u3001\u5468\u6ce2\u6570\u5fdc\u7b54\u8981\u4ef6\u3001\u304a\u3088\u3073\u7528\u9014\u8981\u4ef6\u3092\u3059\u3079\u3066\u7dcf\u5408\u7684\u306b\u6bd4\u8f03\u691c\u8a0e\u3059\u308b\u3053\u3068\u304c\u3001\u6700\u3082\u78ba\u5b9f\u306a\u30a2\u30d7\u30ed\u30fc\u30c1\u3067\u3059\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">ECMIC\u3067\u306f\u3001\u30b5\u30f3\u30d7\u30eb\u627f\u8a8d\u3084\u91cf\u7523\u306b\u5148\u7acb\u3061\u3001\u304a\u5ba2\u69d8\u3068\u5354\u529b\u3057\u3066\u3053\u3046\u3057\u305f\u4ed5\u69d8\u306e\u76f8\u9055\u70b9\u3092\u660e\u78ba\u306b\u3057\u307e\u3059\u3002\u304a\u5ba2\u69d8\u306e\u65e2\u5b58\u306e\u30de\u30a4\u30af\u30ed\u30d5\u30a9\u30f3\u306e\u4ed5\u69d8\u3067\u3001\u7570\u306a\u308b\u611f\u5ea6\u57fa\u6e96\u304c\u63a1\u7528\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u3084\u3001\u7279\u5b9a\u306e\u5468\u6ce2\u6570\u7279\u6027\u8a66\u9a13\u7bc4\u56f2\u304c\u8981\u6c42\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u3067\u3082\u3001\u5f53\u793e\u306e\u30a8\u30f3\u30b8\u30cb\u30a2\u30ea\u30f3\u30b0\u30c1\u30fc\u30e0\u304c\u30d1\u30e9\u30e1\u30fc\u30bf\u3084\u8a66\u9a13\u6761\u4ef6\u306e\u8abf\u6574\u3092\u304a\u624b\u4f1d\u3044\u3044\u305f\u3057\u307e\u3059\u3002.<\/p>\n\n\n\n<h2 id=\"conclusion\" class=\"wp-block-heading\">\u7d50\u8ad6<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u30de\u30a4\u30af\u306e\u4ed5\u69d8\u3092\u7406\u89e3\u3059\u308b\u306b\u306f\u3001\u30c7\u30fc\u30bf\u30b7\u30fc\u30c8\u4e0a\u306e\u6570\u5024\u3092\u6bd4\u8f03\u3059\u308b\u3060\u3051\u3067\u306f\u4e0d\u5341\u5206\u3067\u3059\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B&amp;K\u306e\u751f\u7523\u8a66\u9a13\u66f2\u7dda\u306e\u958b\u59cb\u5468\u6ce2\u6570\u306f\u3001\u5fc5\u305a\u3057\u3082\u305d\u306e\u30de\u30a4\u30af\u30ed\u30d5\u30a9\u30f3\u306e\u5b9f\u969b\u306e\u4f4e\u5468\u6ce2\u6570\u7279\u6027\u3092\u793a\u3059\u3082\u306e\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u540c\u69d8\u306b\u3001-36dB\u3068-56dB\u306b\u3064\u3044\u3066\u306f\u3001\u305d\u308c\u305e\u308c\u306e\u57fa\u6e96\u5024\u3092\u78ba\u8a8d\u305b\u305a\u306b\u76f4\u63a5\u6bd4\u8f03\u3059\u3079\u304d\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ed5\u69d8\u306e\u80cc\u666f\u306b\u3042\u308b\u8a66\u9a13\u6761\u4ef6\u3084\u6e2c\u5b9a\u57fa\u6e96\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001OEM\u9867\u5ba2\u306f\u30b5\u30d7\u30e9\u30a4\u30e4\u30fc\u3092\u3088\u308a\u6b63\u78ba\u306b\u6bd4\u8f03\u691c\u8a0e\u3057\u3001\u30de\u30a4\u30af\u30ed\u30db\u30f3\u958b\u767a\u306b\u304a\u3051\u308b\u4e0d\u5fc5\u8981\u306a\u4ed5\u69d8\u4e0d\u4e00\u81f4\u3092\u56de\u907f\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002.<\/p>","protected":false},"excerpt":{"rendered":"<p>When comparing microphone specifications from different suppliers, you may notice two things that can be confusing. First, a microphone may be specified with a frequency response of 20Hz\u201320kHz, while the production test curve starts at 50Hz. Does this mean the microphone has no response below 50Hz? Second, one supplier may specify sensitivity as -36dB, while another uses -56dB. Does the 20dB difference mean that one microphone is significantly more sensitive? In both cases, the difference often comes from how the microphone is tested and how its specifications are expressed. Understanding these details can help you compare microphone specifications correctly and avoid unnecessary confusion during OEM and ODM projects. 1. Why [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":4328,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[774,773],"class_list":["post-4327","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technical-insights","tag-microphone-specifications","tag-microphone-testing"],"_links":{"self":[{"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/posts\/4327","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=4327"}],"version-history":[{"count":2,"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/posts\/4327\/revisions"}],"predecessor-version":[{"id":4330,"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/posts\/4327\/revisions\/4330"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/media\/4328"}],"wp:attachment":[{"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/media?parent=4327"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/categories?post=4327"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/tags?post=4327"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}