{"id":1781,"date":"2017-04-21T23:49:50","date_gmt":"2017-04-21T15:49:50","guid":{"rendered":"http:\/\/www.bookcard.net\/wordpress\/?p=1781"},"modified":"2019-11-04T17:55:50","modified_gmt":"2019-11-04T09:55:50","slug":"piano_bedt_calc","status":"publish","type":"post","link":"https:\/\/www.bookcard.net\/wordpress\/piano_bedt_calc\/","title":{"rendered":"\u92fc\u7434-\u62cd\u97f3\u7684\u8a08\u7b97"},"content":{"rendered":"<p>\u92fc\u7434-\u62cd\u97f3\u7684\u8a08\u7b97<\/p>\n<p>\u7d14\u5f8b\u983b\u7387\u6bd4<\/p>\n<table>\n<tbody>\n<tr>\n<td width=\"189\">\u97f3\u7a0b<\/td>\n<td width=\"189\">\u6839\u97f3<\/td>\n<td width=\"189\">\u51a0\u97f3<\/td>\n<\/tr>\n<tr>\n<td width=\"189\">\u516b\u5ea6<\/td>\n<td width=\"189\">2<\/td>\n<td width=\"189\">1<\/td>\n<\/tr>\n<tr>\n<td width=\"189\">\u4e94\u5ea6<\/td>\n<td width=\"189\">3<\/td>\n<td width=\"189\">2<\/td>\n<\/tr>\n<tr>\n<td width=\"189\">\u56db\u5ea6<\/td>\n<td width=\"189\">4<\/td>\n<td width=\"189\">3<\/td>\n<\/tr>\n<tr>\n<td width=\"189\">\u5927\u4e09\u5ea6<\/td>\n<td width=\"189\">5<\/td>\n<td width=\"189\">4<\/td>\n<\/tr>\n<tr>\n<td width=\"189\">\u5927\u516d\u5ea6<\/td>\n<td width=\"189\">5<\/td>\n<td width=\"189\">3<\/td>\n<\/tr>\n<tr>\n<td width=\"189\">\u5c0f\u4e09\u5ea6<\/td>\n<td width=\"189\">6<\/td>\n<td width=\"189\">5<\/td>\n<\/tr>\n<tr>\n<td width=\"189\">\u5c0f\u516d<\/td>\n<td width=\"189\">8<\/td>\n<td width=\"189\">3<\/td>\n<\/tr>\n<tr>\n<td width=\"189\">\u540c\u5ea6<\/td>\n<td width=\"189\">1<\/td>\n<td width=\"189\">1<\/td>\n<\/tr>\n<tr>\n<td width=\"189\">\u5927\u4e8c\u5ea6<\/td>\n<td width=\"189\">9<\/td>\n<td width=\"189\">8<\/td>\n<\/tr>\n<tr>\n<td width=\"189\">\u5927\u4e03\u5ea6<\/td>\n<td width=\"189\">15<\/td>\n<td width=\"189\">8<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&nbsp;<\/p>\n<p>\u5341\u4e8c\u5e73\u5747\u5f8b\u983b\u7387\u6bd4<\/p>\n<p><sup>12<\/sup>\u221a2=1.0594630943593<\/p>\n<p>&nbsp;<\/p>\n<p>\u62cd\u97f3\u7684\u8a08\u7b97<\/p>\n<p>\u62cd\u97f3=abs(\u6839\u97f3\u983b\u7387\u503c<em>\u6839\u97f3\u983b\u7387\u6bd4-\u51a0\u97f3\u983b\u7387\u503c<\/em>\u51a0\u97f3\u983b\u7387\u6bd4)<\/p>\n<p>&nbsp;<\/p>\n<p>\u4f8b\u8a08\u7b9737A\u7684\u516b\u5ea649A\u5169\u97f3\u7684\u62cd\u983b<\/p>\n<p>\u6839\u97f337A=220Hz<\/p>\n<p>\u51a0\u97f349A=441Hz<\/p>\n<p>\u62cd\u983b=abs(441<em>1-220<\/em>2)=abs(1)=1\u62cd<\/p>\n<p>&nbsp;<\/p>\n<p>\u4f8b37A=220Hz\u4e0a\u65b9\u56db\u5ea642D<\/p>\n<p>\u7d14\u5f8b:220*(4\/3)=293.33(Hz)<\/p>\n<p>\u5e73\u5747\u5f8b:220*(<sup>12<\/sup>\u221a2)<sup>5<\/sup>=293.66(Hz)<\/p>\n<p>\u62cd\u983b=abs(293.33-293.66)=0.33\u62cd<\/p>\n<p>\u5e73\u5747\u5f8b\u7684\u56db\u5ea6\u6bd4\u7d14\u5f8b\u56db\u5ea6\u5bec<\/p>\n<p>&nbsp;<\/p>\n<p>\u4f8b37A=220Hz\u4e0a\u65b9\u4e94\u5ea644E<\/p>\n<p>\u7d14\u5f8b:220*(3\/2)=330(Hz)<\/p>\n<p>\u5e73\u5747\u5f8b:220*(<sup>12<\/sup>\u221a2)<sup>7<\/sup>=329.628(Hz)<\/p>\n<p>\u62cd\u983b=abs(293.33-293.66)=0.372\u62cd<\/p>\n<p>\u5e73\u5747\u5f8b\u7684\u4e94\u5ea6\u6bd4\u7d14\u5f8b\u4e94\u5ea6\u7a84<\/p>\n<p>&nbsp;<\/p>\n<p>\u4f8b49A=440Hz\u4e0b\u65b9\u4e94\u5ea642D<\/p>\n<p>\u7d14\u5f8b:440\/(3\/2)=293.33(Hz)<\/p>\n<p>\u5e73\u5747\u5f8b:440*(<sup>12<\/sup>\u221a2)<sup>-7<\/sup>=293.66(Hz)<\/p>\n<p>\u62cd\u983b=abs(293.33-293.66)=0.33\u62cd<\/p>\n<p>\u5e73\u5747\u5f8b\u7684\u4e94\u5ea6\u6bd4\u7d14\u5f8b\u4e94\u5ea6\u7a84<\/p>\n<p>&nbsp;<\/p>\n<p>\u4f8b49A=440Hz\u4e0b\u65b9\u56db\u5ea644E<\/p>\n<p>\u7d14\u5f8b:440\/(4\/3)=330(Hz)<\/p>\n<p>\u5e73\u5747\u5f8b:440*(<sup>12<\/sup>\u221a2)<sup>-5<\/sup>=329.628(Hz)<\/p>\n<p>\u62cd\u983b=abs(330-329.628)=0.372\u62cd<\/p>\n<p>\u5e73\u5747\u5f8b\u7684\u56db\u5ea6\u6bd4\u7d14\u5f8b\u56db\u5ea6\u5bec<\/p>\n<p>&nbsp;<\/p>\n<p>\u56db\u5ea6\u8207\u4e94\u5ea6\u7684\u62cd\u983b\u4e00\u81f40.33\u62cd<\/p>\n<p>\u4e94\u5ea6\u8207\u4e94\u5ea6\u7684\u62cd\u983b\u4e00\u81f40.37\u62cd<\/p>\n<p>&nbsp;<\/p>\n<p>\u7e3d\u7d50:\u56db\u5bec\u4e94\u7a84<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u92fc\u7434-\u62cd\u97f3\u7684\u8a08\u7b97 \u7d14\u5f8b\u983b\u7387\u6bd4 \u97f3\u7a0b \u6839\u97f3 \u51a0\u97f3 \u516b\u5ea6 2 1 \u4e94\u5ea6 3 2 \u56db\u5ea6 4 3 \u5927\u4e09\u5ea6 5 4 \u5927\u516d &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/www.bookcard.net\/wordpress\/piano_bedt_calc\/\" class=\"more-link\">\u7e7c\u7e8c\u95b1\u8b80 <span class=\"screen-reader-text\">\u92fc\u7434-\u62cd\u97f3\u7684\u8a08\u7b97<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[21],"tags":[26],"class_list":["post-1781","post","type-post","status-publish","format-standard","hentry","category-piano","tag-piano","entry"],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/posts\/1781","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/comments?post=1781"}],"version-history":[{"count":2,"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/posts\/1781\/revisions"}],"predecessor-version":[{"id":6622,"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/posts\/1781\/revisions\/6622"}],"wp:attachment":[{"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/media?parent=1781"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/categories?post=1781"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/tags?post=1781"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}