{"id":1305,"date":"2025-01-01T08:54:10","date_gmt":"2025-01-01T08:54:10","guid":{"rendered":"http:\/\/schumann.jp\/?p=1305"},"modified":"2025-01-03T05:29:40","modified_gmt":"2025-01-03T05:29:40","slug":"phono-equalizer-%e3%82%82%e8%87%aa%e4%bd%9c%e3%81%a7%e3%81%8d%e3%82%8b%e3%81%8b%e3%83%bb%e3%83%bb%e3%83%bb%e7%a2%ba%e8%aa%8d%e7%b7%a8","status":"publish","type":"post","link":"http:\/\/schumann.jp\/?p=1305","title":{"rendered":"Phono Equalizer \u3082\u81ea\u4f5c\u3067\u304d\u308b\u304b\u30fb\u30fb\u30fb\u78ba\u8a8d\u7de8"},"content":{"rendered":"\n

\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u304c\u7d42\u308f\u3063\u3066\u3001\u307e\u305a\u6700\u521d\u306b\u884c\u3046\u3053\u3068\u306f\u3001\u898f\u5b9a\u306e\u6027\u80fd\u3092\u6e80\u305f\u3057\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3060\u3002\u3000\u97f3\u304c\u3069\u3046\u3053\u3046\u8a00\u3046\u524d\u306b\u3001\u305d\u3061\u3089\u304c\u5927\u5207\u3060\u3002<\/p>\n\n\n\n

\u307e\u305a\u306f\u3001RIAA \u7279\u6027\u3092\u304d\u3061\u3093\u3068\u6e80\u305f\u3057\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u8abf\u3079\u3088\u3046\u3002\u3000RIAA \u7279\u6027\u306e\u8a73\u7d30\u306f\u3001The Art of Analog Circuits<\/a> \u306e\u8a18\u4e8b\u300cRIAA \u30ab\u30fc\u30d6<\/a>\u300d\u3092\u53c2\u8003\u306b\u3057\u305f\u3002<\/p>\n\n\n\n

w=2*\u03c0*f (f:\u5468\u6ce2\u6570 Hz)
RIAA=20*LOG(SQRT(
\u00a0 \u00a0 \u00a0 \u00a0 (1+1\/(0.00318*w)^2)
\u00a0 \u00a0 \u00a0 \u00a0 \/(1+1\/(0.000318*w)^2)
\u00a0 \u00a0 \u00a0 \u00a0 *(1+(0.000075*w)^2)
\u00a0 \u00a0 \u00a0 \u00a0 ) )<\/code>
\u3000\u00a0 +0.08898158095803 \u00a0<\/code><\/p>\n\n\n\n

\u7d50\u679c\u306f\u4e0b\u56f3\u306e\u901a\u308a\u3067\u3001\u00b1 0.2dB \u306e\u7cbe\u5ea6\u3067\u6b63\u3057\u3044\u3053\u3068\u304c\u78ba\u8a8d\u3067\u304d\u305f\u3002<\/p>\n\n\n\n

\"\"<\/a>
\u30af\u30ea\u30c3\u30af\u3067\u62e1\u5927<\/figcaption><\/figure>\n\n\n\n

\u6b21\u306b\u78ba\u8a8d\u3057\u305f\u306e\u306f\u3001NNBA-1 \u306e\u6b6a\u307f\u7387\u7279\u6027\u3067\u3042\u308b\u3002\u3000unbalance \u5165\u529b\u304b\u3089 balance \u51fa\u529b\u3068\u3057\u3066\u3001WaveGene \/ WaveSpectra \u3067\u6e2c\u5b9a\u3057\u3066\u3044\u308b\u3002\u5de6\u30c1\u30e3\u30f3\u30cd\u30eb\u306e\u65b9\u304c\u5c11\u3057\u3088\u3044\u304c\u8aa4\u5dee\u7bc4\u56f2\u3067\u3042\u308d\u3046\u3002\u3000\u4e21\u30c1\u30e3\u30f3\u30cd\u30eb\u3068\u3082 100Hz \u304c\u4ed6\u306e\u5468\u6ce2\u6570\u306b\u6bd4\u3079\u3066\u826f\u597d\u3067\u3001\u305f\u304b\u3058\u3093\u3055\u3093\u306e\u6e2c\u5b9a\u7d50\u679c<\/a>\u3088\u308a\u3084\u3084\u60aa\u3044\u7d50\u679c\u3067\u3042\u308b\u304c\u3001\u6e2c\u5b9a\u7cfb\u304c\u305f\u304b\u3058\u3093\u3055\u3093\u306e\u3088\u3046\u306b\u3088\u3044\u308f\u3051\u3067\u306f\u306a\u3044\u306e\u3067\u3001\u6982\u306d\u59a5\u5f53\u3068\u8003\u3048\u3066\u3044\u308b\u3002<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n
\"\"<\/figure>\n\n\n\n

\u6700\u5f8c\u306b\u96d1\u97f3\u3060\u304c\u3001GwInstek \u306e GDM-8261A \u3067\u6e2c\u5b9a\u3057\u3066\u3001\u4e21\u30c1\u30e3\u30f3\u30cd\u30eb\u3068\u3082 0.\uff12\uff5e3mV \uff08\u3075\u3089\u3064\u304f\uff09\u3067\u3042\u3063\u305f\u3002 MC\u5165\u529b\u3067\u30b2\u30a4\u30f3\u304c 68.7dB \u3042\u308b\u3053\u3068\u3092\u8003\u616e\u3059\u308b\u3068\u3001\u591a\u304f\u898b\u7a4d\u3082\u3063\u3066\u3082\u5165\u529b\u63db\u7b97\u3067 -139dBV \u306e\u7d50\u679c\u3067\u3042\u308b\u3002\u3000A-weighting\u88dc\u6b63\u306a\u3057\u306e\u6570\u5b57\u3067\u3042\u308b\u3053\u3068\u3092\u8003\u3048\u308b\u3068\u3001\u3053\u308c\u307e\u305f\u3059\u3070\u3089\u3057\u3044\u7d50\u679c\u3068\u3044\u3044\u305f\u3044\uff08\u81ea\u753b\u81ea\u8cdb\u3060\u3051\u3069\uff09\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u304c\u7d42\u308f\u3063\u3066\u3001\u307e\u305a\u6700\u521d\u306b\u884c\u3046\u3053\u3068\u306f\u3001\u898f\u5b9a\u306e\u6027\u80fd\u3092\u6e80\u305f\u3057\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3060\u3002\u3000\u97f3\u304c\u3069\u3046\u3053\u3046\u8a00\u3046\u524d\u306b\u3001\u305d\u3061\u3089\u304c\u5927\u5207\u3060\u3002 \u307e\u305a\u306f\u3001RIAA \u7279\u6027\u3092\u304d\u3061\u3093\u3068\u6e80\u305f\u3057\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u8abf\u3079\u3088\u3046\u3002\u3000RIAA \u7279\u6027\u306e\u8a73\u7d30 … \u7d9a\u304d\u3092\u8aad\u3080 Phono Equalizer \u3082\u81ea\u4f5c\u3067\u304d\u308b\u304b\u30fb\u30fb\u30fb\u78ba\u8a8d\u7de8<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[191,10,38],"tags":[192,197],"_links":{"self":[{"href":"http:\/\/schumann.jp\/index.php?rest_route=\/wp\/v2\/posts\/1305"}],"collection":[{"href":"http:\/\/schumann.jp\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/schumann.jp\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/schumann.jp\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/schumann.jp\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1305"}],"version-history":[{"count":6,"href":"http:\/\/schumann.jp\/index.php?rest_route=\/wp\/v2\/posts\/1305\/revisions"}],"predecessor-version":[{"id":1326,"href":"http:\/\/schumann.jp\/index.php?rest_route=\/wp\/v2\/posts\/1305\/revisions\/1326"}],"wp:attachment":[{"href":"http:\/\/schumann.jp\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1305"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/schumann.jp\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1305"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/schumann.jp\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1305"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}