{"id":931,"date":"2023-02-23T14:43:19","date_gmt":"2023-02-23T14:43:19","guid":{"rendered":"https:\/\/episteamousiki.athenarc.gr\/?p=931"},"modified":"2023-06-02T14:33:56","modified_gmt":"2023-06-02T14:33:56","slug":"akous-akouo","status":"publish","type":"post","link":"https:\/\/episteamousiki.athenarc.gr\/index.php\/2023\/02\/23\/akous-akouo\/","title":{"rendered":"\u0391\u03ba\u03bf\u03cd\u03c2; \u0391\u03ba\u03bf\u03cd\u03c9! (\u03bf \u03ae\u03c7\u03bf\u03c2 \u03c9\u03c2 \u03ba\u03cd\u03bc\u03b1)"},"content":{"rendered":"\n<p><strong><u>\u0388\u03c7\u03b5\u03c4\u03b5 \u03b1\u03bd\u03b1\u03c1\u03c9\u03c4\u03b7\u03b8\u03b5\u03af \u03c0\u03bf\u03c4\u03ad \u03c4\u03b9 \u03b5\u03af\u03bd\u03b1\u03b9 \u03ad\u03bd\u03b1 \u03ba\u03cd\u03bc\u03b1;<\/u><\/strong><br><br><em><strong>K\u03cd\u03bc\u03b1<\/strong>: \u03b7 \u03bc\u03b5\u03c4\u03ac\u03b4\u03bf\u03c3\u03b7 \u03bc\u03b9\u03b1\u03c2 \u03b4\u03b9\u03b1\u03c4\u03b1\u03c1\u03b1\u03c7\u03ae\u03c2 \u03b1\u03c0\u03cc \u03bc\u03b9\u03b1 \u03c4\u03b1\u03bb\u03b1\u03bd\u03c4\u03bf\u03cd\u03bc\u03b5\u03bd\u03b7 \u03c0\u03b7\u03b3\u03ae \u03c3\u03b5 \u03ad\u03bd\u03b1 \u03c5\u03bb\u03b9\u03ba\u03cc \u03bc\u03ad\u03c3\u03bf (\u03c3\u03c4\u03b5\u03c1\u03b5\u03cc, \u03c5\u03b3\u03c1\u03cc \u03ae \u03b1\u03ad\u03c1\u03b9\u03bf) \u03bc\u03b5 \u03c4\u03b7\u03bd \u03c0\u03ac\u03c1\u03bf\u03b4\u03bf \u03c4\u03bf\u03c5 \u03c7\u03c1\u03cc\u03bd\u03bf\u03c5. \u03a4\u03b1 \u03ba\u03cd\u03bc\u03b1\u03c4\u03b1 \u03bc\u03b5\u03c4\u03b1\u03c6\u03ad\u03c1\u03bf\u03c5\u03bd \u03b5\u03bd\u03ad\u03c1\u03b3\u03b5\u03b9\u03b1, \u03cc\u03c7\u03b9 \u03cc\u03bc\u03c9\u03c2 \u03bc\u03ac\u03b6\u03b1.<\/em>&nbsp;<\/p>\n\n\n\n<p><br>\u0394\u03b5\u03af\u03c4\u03b5 \u03c4\u03bf \u03c0\u03b1\u03c1\u03b1\u03ba\u03ac\u03c4\u03c9 \u03b2\u03af\u03bd\u03c4\u03b5\u03bf \u03ba\u03b1\u03b9 \u03c3\u03c7\u03bf\u03bb\u03b9\u03ac\u03c3\u03c4\u03b5:<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Mexican Wave in Exam Hall | Childline\" width=\"1140\" height=\"641\" src=\"https:\/\/www.youtube.com\/embed\/BBPlTa64Aeg?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<p>\u03a4\u03b1 \u03b4\u03cd\u03bf \u03c3\u03b7\u03bc\u03b1\u03bd\u03c4\u03b9\u03ba\u03cc\u03c4\u03b5\u03c1\u03b1 \u03b5\u03af\u03b4\u03b7 \u03ba\u03c5\u03bc\u03ac\u03c4\u03c9\u03bd \u03b5\u03af\u03bd\u03b1\u03b9 \u03c4\u03b1 \u03b5\u03b3\u03ba\u03ac\u03c1\u03c3\u03b9\u03b1 \u03ba\u03b1\u03b9 \u03c4\u03b1 \u03b4\u03b9\u03b1\u03bc\u03ae\u03ba\u03b7:<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Longitudinal and Transverse Waves\" width=\"1140\" height=\"641\" src=\"https:\/\/www.youtube.com\/embed\/7cDAYFTXq3E?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<p>\u03a3\u03c7\u03bf\u03bb\u03b9\u03ac\u03c3\u03c4\u03b5: \u03a4\u03b9 \u03b4\u03b9\u03b1\u03c6\u03bf\u03c1\u03ac \u03ad\u03c7\u03b5\u03b9 \u03ad\u03bd\u03b1 \u03b5\u03b3\u03ba\u03ac\u03c1\u03c3\u03b9\u03bf \u03b1\u03c0\u03cc \u03ad\u03bd\u03b1 \u03b4\u03b9\u03ac\u03bc\u03b7\u03ba\u03b5\u03c2 \u03ba\u03cd\u03bc\u03b1;<br><br><strong><u>\u03a0\u03bf\u03b9\u03b1 \u03b5\u03af\u03bd\u03b1\u03b9 \u03c4\u03b1 \u03c7\u03b1\u03c1\u03b1\u03ba\u03c4\u03b7\u03c1\u03b9\u03c3\u03c4\u03b9\u03ba\u03ac \u03b5\u03bd\u03cc\u03c2 \u03ba\u03cd\u03bc\u03b1\u03c4\u03bf\u03c2;<\/u><\/strong><br><br>\u0391\u03c2 \u03b4\u03bf\u03cd\u03bc\u03b5 \u03c4\u03b7 \u03bc\u03bf\u03c1\u03c6\u03ae \u03b5\u03bd\u03cc\u03c2 \u03b5\u03b3\u03ba\u03ac\u03c1\u03c3\u03b9\u03bf\u03c5 \u03ba\u03cd\u03bc\u03b1\u03c4\u03bf\u03c2 \u03ba\u03b1\u03b9 \u03c4\u03b7 \u03bc\u03bf\u03c1\u03c6\u03ae \u03b5\u03bd\u03cc\u03c2 \u03b4\u03b9\u03b1\u03bc\u03ae\u03ba\u03bf\u03c5\u03c2 \u03ba\u03cd\u03bc\u03b1\u03c4\u03bf\u03c2. \u039f\u03b9 \u03c0\u03b1\u03c1\u03b1\u03ba\u03ac\u03c4\u03c9 \u03b5\u03b9\u03ba\u03cc\u03bd\u03b5\u03c2 \u03b1\u03c0\u03bf\u03c4\u03b5\u03bb\u03bf\u03cd\u03bd \u03c3\u03c4\u03b9\u03b3\u03bc\u03b9\u03cc\u03c4\u03c5\u03c0\u03b1 (\u03b2\u03bb\u03ad\u03c0\u03b5 \u00ab\u03c6\u03c9\u03c4\u03bf\u03b3\u03c1\u03b1\u03c6\u03af\u03b5\u03c2\u00bb) \u03b5\u03bd\u03cc\u03c2 \u03b5\u03b3\u03ba\u03ac\u03c1\u03c3\u03b9\u03bf\u03c5 \u03ba\u03b1\u03b9 \u03b5\u03bd\u03cc\u03c2 \u03b4\u03b9\u03b1\u03bc\u03ae\u03ba\u03bf\u03c5\u03c2 \u03ba\u03cd\u03bc\u03b1\u03c4\u03bf\u03c2 \u03bc\u03af\u03b1 \u03c3\u03c5\u03b3\u03ba\u03b5\u03ba\u03c1\u03b9\u03bc\u03ad\u03bd\u03b7 \u03c7\u03c1\u03bf\u03bd\u03b9\u03ba\u03ae \u03c3\u03c4\u03b9\u03b3\u03bc\u03ae:<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" width=\"522\" height=\"283\" src=\"https:\/\/i2.wp.com\/episteamousiki.athenarc.gr\/wp-content\/uploads\/2022\/12\/\u03b5\u03c0\u03b9\u03c3\u03c41.png?resize=522%2C283&#038;ssl=1\" alt=\"\" class=\"wp-image-932\" srcset=\"https:\/\/i2.wp.com\/episteamousiki.athenarc.gr\/wp-content\/uploads\/2022\/12\/\u03b5\u03c0\u03b9\u03c3\u03c41.png?w=522&amp;ssl=1 522w, https:\/\/i2.wp.com\/episteamousiki.athenarc.gr\/wp-content\/uploads\/2022\/12\/\u03b5\u03c0\u03b9\u03c3\u03c41.png?resize=300%2C163&amp;ssl=1 300w\" sizes=\"(max-width: 522px) 100vw, 522px\" data-recalc-dims=\"1\" \/><\/figure>\n\n\n\n<p>\u0395\u03b9\u03ba.1: \u03a3\u03c4\u03b9\u03b3\u03bc\u03b9\u03cc\u03c4\u03c5\u03c0\u03bf \u03b5\u03bd\u03cc\u03c2 \u03b5\u03b3\u03ba\u03ac\u03c1\u03c3\u03b9\u03bf\u03c5 \u03ba\u03cd\u03bc\u03b1\u03c4\u03bf\u03c2<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" width=\"553\" height=\"242\" src=\"https:\/\/i1.wp.com\/episteamousiki.athenarc.gr\/wp-content\/uploads\/2022\/12\/\u03b5\u03c0\u03b9\u03c3\u03c42.png?resize=553%2C242&#038;ssl=1\" alt=\"\" class=\"wp-image-933\" srcset=\"https:\/\/i1.wp.com\/episteamousiki.athenarc.gr\/wp-content\/uploads\/2022\/12\/\u03b5\u03c0\u03b9\u03c3\u03c42.png?w=553&amp;ssl=1 553w, https:\/\/i1.wp.com\/episteamousiki.athenarc.gr\/wp-content\/uploads\/2022\/12\/\u03b5\u03c0\u03b9\u03c3\u03c42.png?resize=300%2C131&amp;ssl=1 300w\" sizes=\"(max-width: 553px) 100vw, 553px\" data-recalc-dims=\"1\" \/><\/figure>\n\n\n\n<p>\u0395\u03b9\u03ba.2: \u03a3\u03c4\u03b9\u03b3\u03bc\u03b9\u03cc\u03c4\u03c5\u03c0\u03bf \u03b5\u03bd\u03cc\u03c2 \u03b4\u03b9\u03b1\u03bc\u03ae\u03ba\u03bf\u03c5\u03c2 \u03ba\u03cd\u03bc\u03b1\u03c4\u03bf\u03c2.<br><br><\/p>\n\n\n\n<p><strong>\u03a3\u03c7\u03bf\u03bb\u03b9\u03ac\u03c3\u03c4\u03b5:<\/strong> \u03a4\u03b9 \u03b5\u03af\u03bd\u03b1\u03b9 \u03c4\u03bf \u03c0\u03bb\u03ac\u03c4\u03bf\u03c2 \u03b5\u03bd\u03cc\u03c2 \u03ba\u03cd\u03bc\u03b1\u03c4\u03bf\u03c2;&nbsp; \u03a4\u03b9 \u03b5\u03af\u03bd\u03b1\u03b9 \u03c4\u03bf \u03bc\u03ae\u03ba\u03bf\u03c2 \u03ba\u03cd\u03bc\u03b1\u03c4\u03bf\u03c2; \u03a3\u03b5 \u03c4\u03b9 \u03bc\u03bf\u03bd\u03ac\u03b4\u03b5\u03c2 \u03bc\u03ad\u03c4\u03c1\u03b7\u03c3\u03b7\u03c2 \u03bc\u03b5\u03c4\u03c1\u03b9\u03bf\u03cd\u03bd\u03c4\u03b1\u03b9; \u03a4\u03b9 \u03b5\u03af\u03bd\u03b1\u03b9 \u03b7 \u03c4\u03b1\u03c7\u03cd\u03c4\u03b7\u03c4\u03b1 \u03b4\u03b9\u03ac\u03b4\u03bf\u03c3\u03b7\u03c2 \u03b5\u03bd\u03cc\u03c2 \u03ba\u03cd\u03bc\u03b1\u03c4\u03bf\u03c2;<br><br><strong>\u03a0\u03bb\u03ac\u03c4\u03bf\u03c2 (\u0391):<\/strong>&nbsp;\u0395\u03af\u03bd\u03b1\u03b9 \u03b7 \u03bc\u03ad\u03b3\u03b9\u03c3\u03c4\u03b7 \u03b1\u03c0\u03bf\u03bc\u03ac\u03ba\u03c1\u03c5\u03bd\u03c3\u03b7 \u03b5\u03bd\u03cc\u03c2 \u03bc\u03bf\u03c1\u03af\u03bf\u03c5 \u03c4\u03bf\u03c5 \u03bc\u03ad\u03c3\u03bf\u03c5 \u03b4\u03b9\u03ac\u03b4\u03bf\u03c3\u03b7\u03c2 \u03c4\u03bf\u03c5 \u03ba\u03cd\u03bc\u03b1\u03c4\u03bf\u03c2 \u03b1\u03c0\u03cc \u03c4\u03b7 \u03b8\u03ad\u03c3\u03b7 \u03b9\u03c3\u03bf\u03c1\u03c1\u03bf\u03c0\u03af\u03b1\u03c2 \u03c4\u03bf\u03c5. \u039c\u03b5\u03c4\u03c1\u03b9\u03ad\u03c4\u03b1\u03b9 \u03c3\u03b5&nbsp;m.<br><br><strong>\u039c\u03ae\u03ba\u03bf\u03c2 \u03ba\u03cd\u03bc\u03b1\u03c4\u03bf\u03c2 (\u03bb):<\/strong>&nbsp;\u0395\u03af\u03bd\u03b1\u03b9 \u03b7 \u03b1\u03c0\u03cc\u03c3\u03c4\u03b1\u03c3\u03b7 \u03b1\u03bd\u03ac\u03bc\u03b5\u03c3\u03b1 \u03c3\u03b5 \u03b4\u03cd\u03bf \u03b4\u03b9\u03b1\u03b4\u03bf\u03c7\u03b9\u03ba\u03ad\u03c2 \u03ba\u03bf\u03b9\u03bb\u03af\u03b5\u03c2 \u03ae \u03cc\u03c1\u03b7 (\u03b3\u03b9\u03b1 \u03c4\u03b1 \u03b5\u03b3\u03ba\u03ac\u03c1\u03c3\u03b9\u03b1 \u03ba\u03cd\u03bc\u03b1\u03c4\u03b1) \u2013 \u03ae \u03b1\u03bd\u03ac\u03bc\u03b5\u03c3\u03b1 \u03c3\u03b5 \u03b4\u03cd\u03bf \u03b4\u03b9\u03b1\u03b4\u03bf\u03c7\u03b9\u03ba\u03ac \u03c0\u03c5\u03ba\u03bd\u03ce\u03bc\u03b1\u03c4\u03b1 \u03ba\u03b1\u03b9 \u03b1\u03c1\u03b1\u03b9\u03ce\u03bc\u03b1\u03c4\u03b1 (\u03b3\u03b9\u03b1 \u03c4\u03b1 \u03b4\u03b9\u03b1\u03bc\u03ae\u03ba\u03b7 \u03ba\u03cd\u03bc\u03b1\u03c4\u03b1. \u039c\u03b5\u03c4\u03c1\u03b9\u03ad\u03c4\u03b1\u03b9 \u03c3\u03b5&nbsp;m.<br><br><strong>\u03a4\u03b1\u03c7\u03cd\u03c4\u03b7\u03c4\u03b1 \u03b4\u03b9\u03ac\u03b4\u03bf\u03c3\u03b7\u03c2 (u):<\/strong>&nbsp;\u0395\u03af\u03bd\u03b1\u03b9 \u03b7 \u03c4\u03b1\u03c7\u03cd\u03c4\u03b7\u03c4\u03b1 \u03bc\u03b5 \u03c4\u03b7\u03bd \u03bf\u03c0\u03bf\u03af\u03b1 \u03b4\u03b9\u03b1\u03b4\u03af\u03b4\u03b5\u03c4\u03b1\u03b9 \u03ad\u03bd\u03b1 \u03ba\u03cd\u03bc\u03b1. \u0395\u03be\u03b1\u03c1\u03c4\u03ac\u03c4\u03b1\u03b9 \u03b1\u03c0\u03cc \u03c4\u03b9\u03c2 \u03b9\u03b4\u03b9\u03cc\u03c4\u03b7\u03c4\u03b5\u03c2 \u03c4\u03bf\u03c5 \u03bc\u03ad\u03c3\u03bf\u03c5 \u03b4\u03b9\u03ac\u03b4\u03bf\u03c3\u03b7\u03c2 \u03c4\u03bf\u03c5 \u03ba\u03cd\u03bc\u03b1\u03c4\u03bf\u03c2. \u039c\u03b5\u03c4\u03c1\u03b9\u03ad\u03c4\u03b1\u03b9 \u03c3\u03b5&nbsp;m\/s.<br><br><br>\u0397 \u03c0\u03b1\u03c1\u03b1\u03ba\u03ac\u03c4\u03c9 \u03b5\u03b9\u03ba\u03cc\u03bd\u03b1 \u03bc\u03b1\u03c2 \u03b4\u03b5\u03af\u03c7\u03bd\u03b5\u03b9 \u03c4\u03b7\u03bd \u03ba\u03af\u03bd\u03b7\u03c3\u03b7 \u03b5\u03bd\u03cc\u03c2 \u03bc\u03bf\u03c1\u03af\u03bf\u03c5 \u03c5\u03bb\u03b9\u03ba\u03bf\u03cd \u03bc\u03ad\u03c3\u03bf\u03c5 \u03c3\u03c4\u03bf \u03bf\u03c0\u03bf\u03af\u03bf \u03b4\u03b9\u03b1\u03b4\u03af\u03b4\u03b5\u03c4\u03b1\u03b9 \u03ad\u03bd\u03b1 \u03b5\u03b3\u03ba\u03ac\u03c1\u03c3\u03b9\u03bf \u03ba\u03cd\u03bc\u03b1 \u03c3\u03b1\u03bd \u03c3\u03c5\u03bd\u03ac\u03c1\u03c4\u03b7\u03c3\u03b7 \u03c4\u03bf\u03c5 \u03c7\u03c1\u03cc\u03bd\u03bf\u03c5.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" width=\"497\" height=\"276\" src=\"https:\/\/i1.wp.com\/episteamousiki.athenarc.gr\/wp-content\/uploads\/2022\/12\/\u03b5\u03c0\u03b9\u03c3\u03c43.png?resize=497%2C276&#038;ssl=1\" alt=\"\" class=\"wp-image-934\" srcset=\"https:\/\/i1.wp.com\/episteamousiki.athenarc.gr\/wp-content\/uploads\/2022\/12\/\u03b5\u03c0\u03b9\u03c3\u03c43.png?w=497&amp;ssl=1 497w, https:\/\/i1.wp.com\/episteamousiki.athenarc.gr\/wp-content\/uploads\/2022\/12\/\u03b5\u03c0\u03b9\u03c3\u03c43.png?resize=300%2C167&amp;ssl=1 300w\" sizes=\"(max-width: 497px) 100vw, 497px\" data-recalc-dims=\"1\" \/><\/figure>\n\n\n\n<p>\u0395\u03b9\u03ba.3 \u03a4\u03b1\u03bb\u03ac\u03bd\u03c4\u03c9\u03c3\u03b7 \u03b5\u03bd\u03cc\u03c2 \u03bc\u03bf\u03c1\u03af\u03bf\u03c5 \u03c3\u03c5\u03bd\u03b1\u03c1\u03c4\u03ae\u03c3\u03b5\u03b9 \u03c4\u03bf\u03c5 \u03c7\u03c1\u03cc\u03bd\u03bf\u03c5 \u03c3\u03b5 \u03ad\u03bd\u03b1 \u03b5\u03b3\u03ba\u03ac\u03c1\u03c3\u03b9\u03bf \u03ba\u03cd\u03bc\u03b1<br><br><strong>\u03a0\u03b5\u03c1\u03af\u03bf\u03b4\u03bf\u03c2 (\u03a4):<\/strong>&nbsp;\u0395\u03af\u03bd\u03b1\u03b9 \u03bf \u03c7\u03c1\u03cc\u03bd\u03bf\u03c2 \u03c0\u03bf\u03c5 \u03bc\u03b5\u03c3\u03bf\u03bb\u03b1\u03b2\u03b5\u03af \u03b1\u03bd\u03ac\u03bc\u03b5\u03c3\u03b1 \u03c3\u03c4\u03b7\u03bd \u03ac\u03c6\u03b9\u03be\u03b7 \u03b4\u03cd\u03bf \u03b4\u03b9\u03b1\u03b4\u03bf\u03c7\u03b9\u03ba\u03ce\u03bd \u03bc\u03b5\u03b3\u03af\u03c3\u03c4\u03c9\u03bd \u03ae \u03b5\u03bb\u03b1\u03c7\u03af\u03c3\u03c4\u03c9\u03bd \u03c4\u03bf\u03c5 \u03ba\u03cd\u03bc\u03b1\u03c4\u03bf\u03c2 \u03c3\u03b5 \u03ad\u03bd\u03b1 \u03c3\u03b7\u03bc\u03b5\u03af\u03bf. \u039c\u03b5\u03c4\u03c1\u03b9\u03ad\u03c4\u03b1\u03b9 \u03c3\u03b5&nbsp;sec.<br><br><strong>\u03a3\u03c5\u03c7\u03bd\u03cc\u03c4\u03b7\u03c4\u03b1 (f):<\/strong>&nbsp;A\u03c1\u03b9\u03b8\u03bc\u03cc\u03c2 \u03c4\u03b1\u03bb\u03b1\u03bd\u03c4\u03ce\u03c3\u03b5\u03c9\u03bd\/sec. \u0397 \u03c3\u03c5\u03c7\u03bd\u03cc\u03c4\u03b7\u03c4\u03b1 \u03b5\u03bd\u03cc\u03c2 \u03ba\u03cd\u03bc\u03b1\u03c4\u03bf\u03c2 \u03b1\u03bd\u03b1\u03c6\u03ad\u03c1\u03b5\u03c4\u03b1\u03b9 \u03c3\u03c4\u03bf \u03c0\u03cc\u03c3\u03bf \u03c3\u03c5\u03c7\u03bd\u03ac \u03c4\u03b1 \u03c3\u03c9\u03bc\u03b1\u03c4\u03af\u03b4\u03b9\u03b1 \u03c4\u03bf\u03c5 \u03bc\u03ad\u03c3\u03bf\u03c5 \u03b4\u03bf\u03bd\u03b5\u03af\u03c4\u03b1\u03b9 \u03cc\u03c4\u03b1\u03bd \u03ad\u03bd\u03b1 \u03ba\u03cd\u03bc\u03b1 \u03c0\u03b5\u03c1\u03bd\u03ac \u03bc\u03ad\u03c3\u03b1 \u03b1\u03c0\u03cc \u03c4\u03bf \u03bc\u03ad\u03c3\u03bf.&nbsp;\u0397 \u03c3\u03c5\u03c7\u03bd\u03cc\u03c4\u03b7\u03c4\u03b1 \u03b5\u03bd\u03cc\u03c2 \u03ba\u03cd\u03bc\u03b1\u03c4\u03bf\u03c2 \u03bc\u03b5\u03c4\u03c1\u03ac\u03c4\u03b1\u03b9 \u03c9\u03c2 \u03bf \u03b1\u03c1\u03b9\u03b8\u03bc\u03cc\u03c2 \u03c4\u03c9\u03bd \u03c0\u03bb\u03ae\u03c1\u03c9\u03bd \u03c4\u03b1\u03bb\u03b1\u03bd\u03c4\u03ce\u03c3\u03b5\u03c9\u03bd \u03b5\u03bd\u03cc\u03c2 \u03c3\u03c9\u03bc\u03b1\u03c4\u03b9\u03b4\u03af\u03bf\u03c5 \u03c4\u03bf\u03c5 \u03bc\u03ad\u03c3\u03bf\u03c5 \u03b1\u03bd\u03ac \u03bc\u03bf\u03bd\u03ac\u03b4\u03b1 \u03c7\u03c1\u03cc\u03bd\u03bf\u03c5.&nbsp;H&nbsp;\u03c3\u03c5\u03c7\u03bd\u03cc\u03c4\u03b7\u03c4\u03b1 \u03b5\u03bd\u03cc\u03c2 \u03ba\u03cd\u03bc\u03b1\u03c4\u03bf\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 \u03af\u03c3\u03b7 \u03bc\u03b5 \u03c4\u03b7 \u03c3\u03c5\u03c7\u03bd\u03cc\u03c4\u03b7\u03c4\u03b1 \u03c4\u03b1\u03bb\u03ac\u03bd\u03c4\u03c9\u03c3\u03b7\u03c2 \u03c4\u03b7\u03c2 \u03c0\u03b7\u03b3\u03ae\u03c2 \u03c4\u03bf\u03c5. \u039c\u03b5\u03c4\u03c1\u03b9\u03ad\u03c4\u03b1\u03b9 \u03c3\u03b5&nbsp;Hz.<\/p>\n\n\n\n<p>H&nbsp;\u03c3\u03c5\u03c7\u03bd\u03cc\u03c4\u03b7\u03c4\u03b1 \u03ba\u03b1\u03b9 \u03b7 \u03c0\u03b5\u03c1\u03af\u03bf\u03b4\u03bf\u03c2 \u03c3\u03c5\u03bd\u03b4\u03ad\u03bf\u03bd\u03c4\u03b1\u03b9 \u03b1\u03c0\u03cc \u03c4\u03b7 \u03c3\u03c7\u03ad\u03c3\u03b7: &nbsp;<strong>f<\/strong><strong>&nbsp;= 1\/<\/strong><strong>T<\/strong><strong><br><br><u>\u0397 \u03b8\u03b5\u03bc\u03b5\u03bb\u03b9\u03ce\u03b4\u03b7\u03c2 \u03c3\u03c7\u03ad\u03c3\u03b7 \u03c4\u03b7\u03c2 \u03ba\u03c5\u03bc\u03b1\u03c4\u03b9\u03ba\u03ae\u03c2<\/u><\/strong><br><br>\u0397 \u03b8\u03b5\u03bc\u03b5\u03bb\u03b9\u03ce\u03b4\u03b7\u03c2 \u03c3\u03c7\u03ad\u03c3\u03b7 \u03c4\u03b7\u03c2 \u03ba\u03c5\u03bc\u03b1\u03c4\u03b9\u03ba\u03ae\u03c2 \u03c3\u03c5\u03bd\u03b4\u03ad\u03b5\u03b9 \u03c4\u03b7\u03bd \u03c4\u03b1\u03c7\u03cd\u03c4\u03b7\u03c4\u03b1 \u03b4\u03b9\u03ac\u03b4\u03bf\u03c3\u03b7\u03c2 \u03b5\u03bd\u03cc\u03c2 \u03ba\u03cd\u03bc\u03b1\u03c4\u03bf\u03c2 \u03bc\u03b5 \u03c4\u03bf \u03bc\u03ae\u03ba\u03bf\u03c2 \u03ba\u03cd\u03bc\u03b1\u03c4\u03bf\u03c2 \u03ba\u03b1\u03b9 \u03c4\u03b7 \u03c3\u03c5\u03c7\u03bd\u03cc\u03c4\u03b7\u03c4\u03ac \u03c4\u03bf\u03c5:<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" width=\"473\" height=\"226\" src=\"https:\/\/i1.wp.com\/episteamousiki.athenarc.gr\/wp-content\/uploads\/2022\/12\/\u03b5\u03c0\u03b9\u03c3\u03c44.png?resize=473%2C226&#038;ssl=1\" alt=\"\" class=\"wp-image-935\" srcset=\"https:\/\/i1.wp.com\/episteamousiki.athenarc.gr\/wp-content\/uploads\/2022\/12\/\u03b5\u03c0\u03b9\u03c3\u03c44.png?w=473&amp;ssl=1 473w, https:\/\/i1.wp.com\/episteamousiki.athenarc.gr\/wp-content\/uploads\/2022\/12\/\u03b5\u03c0\u03b9\u03c3\u03c44.png?resize=300%2C143&amp;ssl=1 300w\" sizes=\"(max-width: 473px) 100vw, 473px\" data-recalc-dims=\"1\" \/><\/figure>\n\n\n\n<p>\u0395\u03b9\u03ba.4: \u0397 \u03b8\u03b5\u03bc\u03b5\u03bb\u03b9\u03ce\u03b4\u03b7\u03c2 \u03b5\u03be\u03af\u03c3\u03c9\u03c3\u03b7 \u03c4\u03b7\u03c2 \u03ba\u03c5\u03bc\u03b1\u03c4\u03b9\u03ba\u03ae\u03c2<strong><br><\/strong><\/p>\n\n\n\n<p><strong><u>\u0395\u03c6\u03b1\u03c1\u03bc\u03bf\u03b3\u03ae \u03c3\u03c4\u03bf\u03bd \u03ae\u03c7\u03bf<\/u><\/strong><br><em>\u03a4\u03b9 \u03c0\u03b9\u03c3\u03c4\u03b5\u03cd\u03b5\u03c4\u03b5 \u03bf\u03c4\u03b9 \u03b5\u03af\u03bd\u03b1\u03b9 \u03bf \u03ae\u03c7\u03bf\u03c2;;<br><br>\u039f \u03ae\u03c7\u03bf\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 \u03ad\u03bd\u03b1 \u03b4\u03b9\u03ac\u03bc\u03b7\u03ba\u03b5\u03c2 \u03ba\u03cd\u03bc\u03b1.<\/em><\/p>\n\n\n\n<p><em><br>\u0388\u03bd\u03b1 \u03b7\u03c7\u03b7\u03c4\u03b9\u03ba\u03cc \u03ba\u03cd\u03bc\u03b1, \u03cc\u03c0\u03c9\u03c2 \u03ba\u03ac\u03b8\u03b5 \u03ac\u03bb\u03bb\u03bf \u03ba\u03cd\u03bc\u03b1, \u03b5\u03b9\u03c3\u03ac\u03b3\u03b5\u03c4\u03b1\u03b9 \u03c3\u03b5 \u03ad\u03bd\u03b1 \u03bc\u03ad\u03c3\u03bf \u03b1\u03c0\u03cc \u03ad\u03bd\u03b1 \u03b4\u03bf\u03bd\u03bf\u03cd\u03bc\u03b5\u03bd\u03bf \u03b1\u03bd\u03c4\u03b9\u03ba\u03b5\u03af\u03bc\u03b5\u03bd\u03bf: \u03bc\u03af\u03b1 \u03b7\u03c7\u03b7\u03c4\u03b9\u03ba\u03ae \u03c0\u03b7\u03b3\u03ae. \u03a4\u03bf \u03b4\u03bf\u03bd\u03bf\u03cd\u03bc\u03b5\u03bd\u03bf \u03b1\u03bd\u03c4\u03b9\u03ba\u03b5\u03af\u03bc\u03b5\u03bd\u03bf \u03c0\u03bf\u03c5 \u03b4\u03b7\u03bc\u03b9\u03bf\u03c5\u03c1\u03b3\u03b5\u03af \u03c4\u03b7 \u03b4\u03b9\u03b1\u03c4\u03b1\u03c1\u03b1\u03c7\u03ae \u03bc\u03c0\u03bf\u03c1\u03b5\u03af \u03bd\u03b1 \u03b5\u03af\u03bd\u03b1\u03b9 \u03bf\u03b9 \u03c6\u03c9\u03bd\u03b7\u03c4\u03b9\u03ba\u03ad\u03c2 \u03c7\u03bf\u03c1\u03b4\u03ad\u03c2 \u03b5\u03bd\u03cc\u03c2 \u03b1\u03bd\u03b8\u03c1\u03ce\u03c0\u03bf\u03c5, \u03bc\u03b9\u03b1 \u03c4\u03b1\u03bb\u03b1\u03bd\u03c4\u03bf\u03cd\u03bc\u03b5\u03bd\u03b7 \u03c7\u03bf\u03c1\u03b4\u03ae, \u03ad\u03bd\u03b1 \u03b1\u03bd\u03c4\u03b9\u03ba\u03b5\u03af\u03bc\u03b5\u03bd\u03bf \u03c0\u03bf\u03c5 \u03c7\u03c4\u03c5\u03c0\u03ae\u03c3\u03b1\u03bc\u03b5, \u03c4\u03bf &nbsp;\u03b4\u03b9\u03ac\u03c6\u03c1\u03b1\u03b3\u03bc\u03b1 \u03b5\u03bd\u03cc\u03c2 \u03c1\u03b1\u03b4\u03b9\u03bf\u03c6\u03c9\u03bd\u03b9\u03ba\u03bf\u03cd \u03b7\u03c7\u03b5\u03af\u03bf\u03c5 \u03ba.\u03b1.<\/em><\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-4-3 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"What Is Sound? | Design Squad\" width=\"1140\" height=\"855\" src=\"https:\/\/www.youtube.com\/embed\/27a26e2CnuM?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<p><em>\u03a4\u03b1 \u03bc\u03cc\u03c1\u03b9\u03b1 \u03c4\u03bf\u03c5 \u03c5\u03bb\u03b9\u03ba\u03bf\u03cd \u03bc\u03ad\u03c3\u03bf\u03c5 \u03b1\u03c1\u03c7\u03af\u03b6\u03bf\u03c5\u03bd \u03bd\u03b1 \u03c4\u03b1\u03bb\u03b1\u03bd\u03c4\u03ce\u03bd\u03bf\u03bd\u03c4\u03b1\u03b9 \u03ba\u03b1\u03c4\u03ac \u03bc\u03ae\u03ba\u03bf\u03c2 \u03c4\u03b7\u03c2 \u03b4\u03b9\u03ac\u03b4\u03bf\u03c3\u03b7\u03c2 \u03c4\u03bf\u03c5 \u03b7\u03c7\u03b7\u03c4\u03b9\u03ba\u03bf\u03cd \u03ba\u03cd\u03bc\u03b1\u03c4\u03bf\u03c2. \u0386\u03bb\u03bb\u03bf\u03c4\u03b5 \u03ad\u03c1\u03c7\u03bf\u03bd\u03c4\u03b1\u03b9 \u03c0\u03b9\u03bf \u00ab\u03ba\u03bf\u03bd\u03c4\u03ac\u00bb \u03bc\u03b5 \u03b1\u03c0\u03bf\u03c4\u03ad\u03bb\u03b5\u03c3\u03bc\u03b1 \u03bd\u03b1 \u03ad\u03c7\u03bf\u03c5\u03bc\u03b5 \u03ad\u03bd\u03b1 \u03c0\u03cd\u03ba\u03bd\u03c9\u03bc\u03b1, \u03b4\u03b7\u03bb\u03b1\u03b4\u03ae \u03b1\u03c5\u03be\u03ac\u03bd\u03b5\u03c4\u03b1\u03b9 \u03b7 \u03c0\u03c5\u03ba\u03bd\u03cc\u03c4\u03b7\u03c4\u03b1 \u03ba\u03b1\u03b9 \u03b7 \u03c0\u03af\u03b5\u03c3\u03b7 \u03c4\u03bf\u03c5 \u03c5\u03bb\u03b9\u03ba\u03bf\u03cd. \u0386\u03bb\u03bb\u03bf\u03c4\u03b5 \u03b1\u03c0\u03bf\u03bc\u03b1\u03ba\u03c1\u03cd\u03bd\u03bf\u03bd\u03c4\u03b1\u03b9 \u03bc\u03b5\u03c4\u03b1\u03be\u03cd \u03c4\u03bf\u03c5\u03c2 \u03ce\u03c3\u03c4\u03b5 \u03bd\u03b1 \u03ad\u03c7\u03bf\u03c5\u03bc\u03b5 \u03ad\u03bd\u03b1 \u03b1\u03c1\u03b1\u03af\u03c9\u03bc\u03b1, \u03b4\u03b7\u03bb\u03b1\u03b4\u03ae \u03b5\u03bb\u03b1\u03c4\u03c4\u03ce\u03bd\u03b5\u03c4\u03b1\u03b9 \u03b7 \u03c0\u03c5\u03ba\u03bd\u03cc\u03c4\u03b7\u03c4\u03b1 \u03ba\u03b1\u03b9 \u03b7 \u03c0\u03af\u03b5\u03c3\u03b7 \u03c4\u03bf\u03c5 \u03c5\u03bb\u03b9\u03ba\u03bf\u03cd.<\/em><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" width=\"507\" height=\"184\" src=\"https:\/\/i1.wp.com\/episteamousiki.athenarc.gr\/wp-content\/uploads\/2022\/12\/\u03b5\u03c0\u03b9\u03c3\u03c45.png?resize=507%2C184&#038;ssl=1\" alt=\"\" class=\"wp-image-936\" srcset=\"https:\/\/i1.wp.com\/episteamousiki.athenarc.gr\/wp-content\/uploads\/2022\/12\/\u03b5\u03c0\u03b9\u03c3\u03c45.png?w=507&amp;ssl=1 507w, https:\/\/i1.wp.com\/episteamousiki.athenarc.gr\/wp-content\/uploads\/2022\/12\/\u03b5\u03c0\u03b9\u03c3\u03c45.png?resize=300%2C109&amp;ssl=1 300w\" sizes=\"(max-width: 507px) 100vw, 507px\" data-recalc-dims=\"1\" \/><\/figure>\n\n\n\n<p>\u0395\u03b9\u03ba. 5: \u0397 \u03b4\u03b9\u03ac\u03b4\u03bf\u03c3\u03b7 \u03c4\u03bf\u03c5 \u03ae\u03c7\u03bf\u03c5.<\/p>\n\n\n\n<p><br><strong><u>\u0397 \u03c3\u03c5\u03c7\u03bd\u03cc\u03c4\u03b7\u03c4\u03b1 \u03c4\u03bf\u03c5 \u03ae\u03c7\u03bf\u03c5<\/u><\/strong><\/p>\n\n\n\n<p>\u0397 \u03c3\u03c5\u03c7\u03bd\u03cc\u03c4\u03b7\u03c4\u03b1 \u03c4\u03bf\u03c5 \u03ae\u03c7\u03bf\u03c5 \u03b9\u03c3\u03bf\u03cd\u03c4\u03b1\u03b9 \u03bc\u03b5 \u03c4\u03bf\u03bd \u03b1\u03c1\u03b9\u03b8\u03bc\u03cc \u03c0\u03c5\u03ba\u03bd\u03c9\u03bc\u03ac\u03c4\u03c9\u03bd \u03ae \u03b1\u03c1\u03b1\u03b9\u03c9\u03bc\u03ac\u03c4\u03c9\u03bd \u03c0\u03bf\u03c5 \u03b5\u03ba\u03c0\u03ad\u03bc\u03c0\u03b5\u03b9 \u03bc\u03b9\u03b1 \u03b7\u03c7\u03b7\u03c4\u03b9\u03ba\u03ae \u03c0\u03b7\u03b3\u03ae \u03ba\u03ac\u03b8\u03b5 \u03b4\u03b5\u03c5\u03c4\u03b5\u03c1\u03cc\u03bb\u03b5\u03c0\u03c4\u03bf.<br><br>\u0397 \u03c3\u03c5\u03c7\u03bd\u03cc\u03c4\u03b7\u03c4\u03b1 \u03c4\u03bf\u03c5 \u03ae\u03c7\u03bf\u03c5 \u03c3\u03c7\u03b5\u03c4\u03af\u03b6\u03b5\u03c4\u03b1\u03b9 \u03ac\u03bc\u03b5\u03c3\u03b1 \u03bc\u03b5 \u03c4\u03bf \u03c4\u03bf\u03bd\u03b9\u03ba\u03cc \u03cd\u03c8\u03bf\u03c2: \u03c4\u03bf \u03c0\u03cc\u03c3\u03bf \u03bf\u03be\u03cd\u03c2 \u03b7 \u03b2\u03b1\u03c1\u03cd\u03c2 \u03b1\u03ba\u03bf\u03cd\u03b3\u03b5\u03c4\u03b1\u03b9 \u03ad\u03bd\u03b1\u03c2 \u03ae\u03c7\u03bf\u03c2 \u03c3\u03c4\u03b1 \u03b1\u03c5\u03c4\u03b9\u03ac \u03bc\u03b1\u03c2.<br>\u03a4\u03bf \u03b1\u03bd\u03b8\u03c1\u03ce\u03c0\u03b9\u03bd\u03bf \u03b1\u03c5\u03c4\u03af \u03bc\u03c0\u03bf\u03c1\u03b5\u03af \u03bd\u03b1 \u03b1\u03ba\u03bf\u03cd\u03c3\u03b5\u03b9 \u03c3\u03c5\u03c7\u03bd\u03cc\u03c4\u03b7\u03c4\u03b5\u03c2 \u03b1\u03c0\u03cc <strong>20 Hz<\/strong>\u00a0\u03ad\u03c9\u03c2 \u03ba\u03b1\u03b9 <strong>20.000\u00a0Hz<\/strong>.<br><br>\u039f\u03c1\u03b9\u03c3\u03bc\u03ad\u03bd\u03b1 \u03b7\u03c7\u03b7\u03c4\u03b9\u03ba\u03ac \u03ba\u03cd\u03bc\u03b1\u03c4\u03b1 \u03c0\u03bf\u03c5 \u03cc\u03c4\u03b1\u03bd \u03c0\u03b1\u03af\u03b6\u03bf\u03bd\u03c4\u03b1\u03b9 \u03c4\u03b1\u03c5\u03c4\u03cc\u03c7\u03c1\u03bf\u03bd\u03b1 \u03c0\u03b1\u03c1\u03ac\u03b3\u03bf\u03c5\u03bd \u03bc\u03b9\u03b1 \u03b9\u03b4\u03b9\u03b1\u03af\u03c4\u03b5\u03c1\u03b1 \u03b5\u03c5\u03c7\u03ac\u03c1\u03b9\u03c3\u03c4\u03b7 \u03b1\u03af\u03c3\u03b8\u03b7\u03c3\u03b7 \u03cc\u03c4\u03b1\u03bd \u03b1\u03ba\u03bf\u03c5\u03c3\u03c4\u03bf\u03cd\u03bd, \u03bb\u03ad\u03b3\u03b5\u03c4\u03b1\u03b9 \u03cc\u03c4\u03b9 <em>\u03c3\u03c5\u03bc\u03c6\u03c9\u03bd\u03bf\u03cd\u03bd<\/em>. \u0397 \u03b1\u03bd\u03b1\u03bb\u03bf\u03b3\u03af\u03b1 (\u03c0\u03b7\u03bb\u03af\u03ba\u03bf) \u03c3\u03c5\u03c7\u03bd\u03bf\u03c4\u03ae\u03c4\u03c9\u03bd \u03b4\u03cd\u03bf \u03c4\u03ad\u03c4\u03bf\u03b9\u03c9\u03bd <em>\u03c3\u03cd\u03bc\u03c6\u03c9\u03bd\u03c9\u03bd \u03ba\u03c5\u03bc\u03ac\u03c4\u03c9\u03bd <\/em>\u03c3\u03c5\u03bd\u03b9\u03c3\u03c4\u03ac \u03ad\u03bd\u03b1 <em><a href=\"https:\/\/episteamousiki.athenarc.gr\/index.php\/2023\/02\/23\/mathimatika-kai-mousika-diastimata\/\">\u03bc\u03bf\u03c5\u03c3\u03b9\u03ba\u03cc \u03b4\u03b9\u03ac\u03c3\u03c4\u03b7\u03bc\u03b1<\/a><\/em>.\u00a0\u0393\u03b9\u03b1 \u03c0\u03b1\u03c1\u03ac\u03b4\u03b5\u03b9\u03b3\u03bc\u03b1, \u03b4\u03c5\u03bf \u03ae\u03c7\u03bf\u03b9 \u03c4\u03c9\u03bd \u03bf\u03c0\u03bf\u03af\u03c9\u03bd \u03bf\u03b9 \u03c3\u03c5\u03c7\u03bd\u03cc\u03c4\u03b7\u03c4\u03b5\u03c2 \u03c3\u03c7\u03b7\u03bc\u03b1\u03c4\u03af\u03b6\u03bf\u03c5\u03bd \u03bb\u03cc\u03b3\u03bf 2:1 (\u03c0.\u03c7 \u03ad\u03bd\u03b1\u03c2 \u03ae\u03c7\u03bf\u03c2 \u03c3\u03c5\u03c7\u03bd\u03cc\u03c4\u03b7\u03c4\u03b1\u03c2 512\u00a0Hz\u00a0\u03ba\u03b1\u03b9 \u03ad\u03bd\u03b1\u03c2 256\u00a0Hz) \u03bb\u03ad\u03b3\u03b5\u03c4\u03b1\u03b9 \u03cc\u03c4\u03b9 \u03c7\u03c9\u03c1\u03af\u03b6\u03bf\u03bd\u03c4\u03b1\u03b9 \u03ba\u03b1\u03c4\u03ac \u03bc\u03b9\u03b1 \u03bf\u03ba\u03c4\u03ac\u03b2\u03b1.\u00a0\u0394\u03b7\u03bb\u03b1\u03b4\u03ae, \u03b4\u03cd\u03bf \u03b7\u03c7\u03b7\u03c4\u03b9\u03ba\u03ac \u03ba\u03cd\u03bc\u03b1\u03c4\u03b1 \u03c0\u03bf\u03c5 \u03c0\u03b1\u03af\u03b6\u03bf\u03bd\u03c4\u03b1\u03b9 \u03bc\u03b1\u03b6\u03af, \u03b1\u03bd \u03ad\u03bd\u03b1\u03c2 \u03ae\u03c7\u03bf\u03c2 \u03ad\u03c7\u03b5\u03b9 \u03b4\u03b9\u03c0\u03bb\u03ac\u03c3\u03b9\u03b1 \u03c3\u03c5\u03c7\u03bd\u03cc\u03c4\u03b7\u03c4\u03b1 \u03b1\u03c0\u03cc \u03c4\u03b7\u03bd \u03ac\u03bb\u03bb\u03b7, \u03b1\u03ba\u03bf\u03cd\u03b3\u03bf\u03bd\u03c4\u03b1\u03b9 \u03b1\u03c1\u03bc\u03bf\u03bd\u03b9\u03ba\u03ac. <br><br><strong><u>\u0394\u03c1\u03b1\u03c3\u03c4\u03b7\u03c1\u03b9\u03cc\u03c4\u03b7\u03c4\u03b1: \u03a3\u03c5\u03c7\u03bd\u03cc\u03c4\u03b7\u03c4\u03b1 \u03ba\u03b1\u03b9 \u03c4\u03bf\u03bd\u03b9\u03ba\u03cc \u03cd\u03c8\u03bf\u03c2<br><br><\/u><\/strong>\u03a0\u03b5\u03b9\u03c1\u03b1\u03bc\u03b1\u03c4\u03b9\u03c3\u03c4\u03b5\u03af\u03c4\u03b5 \u03ba\u03b1\u03b9 \u03b5\u03be\u03b5\u03c1\u03b5\u03c5\u03bd\u03ae\u03c3\u03c4\u03b5 \u03bc\u03cc\u03bd\u03bf\u03b9 \u03c3\u03b1\u03c2 \u03c4\u03b1 \u03cc\u03c1\u03b9\u03b1 \u03c4\u03b7\u03c2 \u03b1\u03ba\u03bf\u03ae\u03c2 \u03c3\u03b1\u03c2!<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"20Hz to 20kHz (Human Audio Spectrum)\" width=\"1140\" height=\"641\" src=\"https:\/\/www.youtube.com\/embed\/qNf9nzvnd1k?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u0388\u03c7\u03b5\u03c4\u03b5 \u03b1\u03bd\u03b1\u03c1\u03c9\u03c4\u03b7\u03b8\u03b5\u03af \u03c0\u03bf\u03c4\u03ad \u03c4\u03b9 \u03b5\u03af\u03bd\u03b1\u03b9 \u03ad\u03bd\u03b1 \u03ba\u03cd\u03bc\u03b1; K\u03cd\u03bc\u03b1: \u03b7 \u03bc\u03b5\u03c4\u03ac\u03b4\u03bf\u03c3\u03b7 \u03bc\u03b9\u03b1\u03c2 \u03b4\u03b9\u03b1\u03c4\u03b1\u03c1\u03b1\u03c7\u03ae\u03c2 \u03b1\u03c0\u03cc \u03bc\u03b9\u03b1 \u03c4\u03b1\u03bb\u03b1\u03bd\u03c4\u03bf\u03cd\u03bc\u03b5\u03bd\u03b7 \u03c0\u03b7\u03b3\u03ae \u03c3\u03b5 \u03ad\u03bd\u03b1 \u03c5\u03bb\u03b9\u03ba\u03cc \u03bc\u03ad\u03c3\u03bf (\u03c3\u03c4\u03b5\u03c1\u03b5\u03cc, \u03c5\u03b3\u03c1\u03cc \u03ae \u03b1\u03ad\u03c1\u03b9\u03bf) \u03bc\u03b5 \u03c4\u03b7\u03bd \u03c0\u03ac\u03c1\u03bf\u03b4\u03bf \u03c4\u03bf\u03c5 \u03c7\u03c1\u03cc\u03bd\u03bf\u03c5. \u03a4\u03b1 \u03ba\u03cd\u03bc\u03b1\u03c4\u03b1 \u03bc\u03b5\u03c4\u03b1\u03c6\u03ad\u03c1\u03bf\u03c5\u03bd \u03b5\u03bd\u03ad\u03c1\u03b3\u03b5\u03b9\u03b1, \u03cc\u03c7\u03b9 \u03cc\u03bc\u03c9\u03c2 \u03bc\u03ac\u03b6\u03b1.&nbsp; \u0394\u03b5\u03af\u03c4\u03b5 \u03c4\u03bf \u03c0\u03b1\u03c1\u03b1\u03ba\u03ac\u03c4\u03c9 \u03b2\u03af\u03bd\u03c4\u03b5\u03bf \u03ba\u03b1\u03b9 \u03c3\u03c7\u03bf\u03bb\u03b9\u03ac\u03c3\u03c4\u03b5: \u03a4\u03b1 \u03b4\u03cd\u03bf \u03c3\u03b7\u03bc\u03b1\u03bd\u03c4\u03b9\u03ba\u03cc\u03c4\u03b5\u03c1\u03b1 \u03b5\u03af\u03b4\u03b7 \u03ba\u03c5\u03bc\u03ac\u03c4\u03c9\u03bd \u03b5\u03af\u03bd\u03b1\u03b9 \u03c4\u03b1 \u03b5\u03b3\u03ba\u03ac\u03c1\u03c3\u03b9\u03b1 \u03ba\u03b1\u03b9 \u03c4\u03b1 \u03b4\u03b9\u03b1\u03bc\u03ae\u03ba\u03b7: \u03a3\u03c7\u03bf\u03bb\u03b9\u03ac\u03c3\u03c4\u03b5: \u03a4\u03b9 [&hellip;]<\/p>\n","protected":false},"author":16,"featured_media":936,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"spay_email":""},"categories":[1,17,40],"tags":[],"aioseo_notices":[],"jetpack_featured_media_url":"https:\/\/i1.wp.com\/episteamousiki.athenarc.gr\/wp-content\/uploads\/2022\/12\/\u03b5\u03c0\u03b9\u03c3\u03c45.png?fit=507%2C184&ssl=1","jetpack-related-posts":[{"id":956,"url":"https:\/\/episteamousiki.athenarc.gr\/index.php\/2023\/01\/23\/synthetoi-ichoi-diakrotima\/","url_meta":{"origin":931,"position":0},"title":"\u03a3\u03cd\u03bd\u03b8\u03b5\u03c4\u03bf\u03b9 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\u03ba\u03b1\u03b9 \u03c0\u03b5\u03b9\u03c1\u03b1\u03bc\u03b1\u03c4\u03af\u03b6\u03bf\u03bd\u03c4\u03b1\u03b9 \u03bc\u03b5 \u03c4\u03b7\u03bd \u03ad\u03bd\u03bd\u03bf\u03b9\u03b1 \u03c4\u03bf\u03c5 \u03b4\u03b9\u03b1\u03ba\u03c1\u03bf\u03c4\u03ae\u03bc\u03b1\u03c4\u03bf\u03c2. \u03a3\u03c7\u03ad\u03b4\u03b9\u03bf \u039c\u03b1\u03b8\u03ae\u03bc\u03b1\u03c4\u03bf\u03c2: \u039c\u03b5\u03bb\u03b5\u03c4\u03ac\u03bc\u03b5\u00a0 \u03c4\u03b1 \u03ba\u03cd\u03bc\u03b1\u03c4\u03b1 \u03ba\u03b1\u03b9 \u03c4\u03b7 \u03c3\u03cd\u03bd\u03b8\u03b5\u03c3\u03ae \u03c4\u03bf\u03c5\u03c2\u00a0 \u03bc\u03ad\u03c3\u03b1 \u03b1\u03c0\u03cc \u03c4\u03bf\u03c5\u03c2 \u03ae\u03c7\u03bf\u03c5\u03c2 \u03bc\u03b5 \u03c4\u03b7 \u03b2\u03bf\u03ae\u03b8\u03b5\u03b9\u03b1 \u03c4\u03bf\u03c5 \u03a3\u03c5\u03bd\u03b8\u03ad\u03c4\u03b7 \u03ae\u03c7\u03c9\u03bd \u03c4\u03bf\u03c5\u2026","rel":"","context":"In 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