{"id":2849,"date":"2025-05-21T13:12:24","date_gmt":"2025-05-21T05:12:24","guid":{"rendered":"https:\/\/ecmicrophones.com\/?p=2849"},"modified":"2026-03-05T12:39:01","modified_gmt":"2026-03-05T04:39:01","slug":"hole-design-in-electret-microphone-capsules","status":"publish","type":"post","link":"https:\/\/ecmicrophones.com\/ja\/hole-design-in-electret-microphone-capsules\/","title":{"rendered":"\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30de\u30a4\u30af\u30ed\u30db\u30f3\u30ab\u30d7\u30bb\u30eb\u306e\u7a74\u8a2d\u8a08"},"content":{"rendered":"
\n
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    \n
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    When observing an electret microphone capsule, the front side typically appears sealed \u2014 with no visible holes. That\u2019s because it is usually covered by a dustproof mesh or a waterproof membrane. These layers protect the internal components from dust and moisture while still allowing sound to reach the diaphragm. Front vs. Rear Holes Since the front is visually sealed and acoustically protected, this article focuses on the holes on the rear panel \u2014 their number, layout, and acoustic purpose. Rear holes are a key factor in shaping the microphone\u2019s directivity and frequency response. Let\u2019s explore how different microphone types \u2014 omnidirectional, bidirectional, and unidirectional \u2014 utilize different hole designs to serve their […]<\/p>\n","protected":false},"author":1,"featured_media":2858,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[573,574,575],"class_list":["post-2849","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technical-insights","tag-acoustic-venting","tag-directivity-control","tag-pressure-equalization"],"_links":{"self":[{"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/posts\/2849","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=2849"}],"version-history":[{"count":0,"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/posts\/2849\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/media\/2858"}],"wp:attachment":[{"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/media?parent=2849"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/categories?post=2849"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/tags?post=2849"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}