{"id":60519,"date":"2026-02-14T05:40:08","date_gmt":"2026-02-13T20:40:08","guid":{"rendered":"https:\/\/phys-edu.net\/wp\/?p=60519"},"modified":"2026-02-14T05:40:08","modified_gmt":"2026-02-13T20:40:08","slug":"why-does-an-ambulance-sound-change-uncover-the-doppler-effect-with-scratch","status":"publish","type":"post","link":"https:\/\/phys-edu.net\/wp\/?p=60519&lang=en","title":{"rendered":"Why Does an Ambulance Sound Change? Uncover the Doppler Effect with Scratch!"},"content":{"rendered":"<p style=\"text-align: center;\"><span style=\"color: #339966;\"><strong>I am Ken Kuwako, a Science Trainer. Every day is an experiment!<\/strong><\/span><\/p>\n<p>Have you ever been walking down the street when an ambulance races past, and the high-pitched &#8220;wee-woo&#8221; suddenly drops in pitch the exact moment it passes you?<\/p>\n<p>This curious phenomenon is known as the <b>Doppler Effect<\/b>. You might have heard the name before, but how many people actually know how it works? It is a truly dynamic event where &#8220;waves&#8221;\u2014the true form of sound\u2014stretch and squash depending on how the sound source or the listener moves.<\/p>\n<p>In this post, I will introduce some interactive simulators and tools that let you feel the Doppler Effect with your own senses. If you are interested in a deep dive into the experimental data, be sure to check out this article as well:<\/p>\n<blockquote class=\"wp-embedded-content\" data-secret=\"BonuayqleW\"><p><a href=\"https:\/\/phys-edu.net\/wp\/?p=22847\">\u6551\u6025\u8eca\u306e\u30b5\u30a4\u30ec\u30f3\u304c\u5909\u308f\u308b\u77ac\u9593\u3092\u518d\u73fe\uff01\u30b9\u30de\u30db\u3067\u697d\u3057\u3080\u9a5a\u304d\u306e\u79d1\u5b66\u5b9f\u9a13\uff08\u30c9\u30c3\u30d7\u30e9\u30fc\u52b9\u679c\uff09<\/a><\/p><\/blockquote>\n<p><iframe loading=\"lazy\" class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; visibility: hidden;\" title=\"&#8220;\u6551\u6025\u8eca\u306e\u30b5\u30a4\u30ec\u30f3\u304c\u5909\u308f\u308b\u77ac\u9593\u3092\u518d\u73fe\uff01\u30b9\u30de\u30db\u3067\u697d\u3057\u3080\u9a5a\u304d\u306e\u79d1\u5b66\u5b9f\u9a13\uff08\u30c9\u30c3\u30d7\u30e9\u30fc\u52b9\u679c\uff09&#8221; &#8212; \u79d1\u5b66\u306e\u30cd\u30bf\u5e33\" src=\"https:\/\/phys-edu.net\/wp\/?p=22847&#038;embed=true#?secret=lR4ZFRTjSV#?secret=BonuayqleW\" data-secret=\"BonuayqleW\" width=\"600\" height=\"338\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe><\/p>\n<h3>Experience the Shift: The Sound of a Train Crossing<\/h3>\n<p>The Doppler Effect is all around us in our daily lives. For example, if you are riding a train or watching one zoom past from the platform, you have the perfect chance to observe it. First, take a look at this video. It captures the clear difference in the sound of a railroad crossing signal when heard from outside the train versus from inside a moving carriage. You can hear the pitch shift vividly!<\/p>\n<p><iframe loading=\"lazy\" title=\"\u8e0f\u5207\u97f3\u3068\u30c9\u30c3\u30d7\u30e9\u30fc\u52b9\u679c\uff08\u96fb\u8eca\u306b\u4e57\u3063\u3066\u805e\u3044\u3066\u307f\u305f\uff09\" width=\"1140\" height=\"641\" src=\"https:\/\/www.youtube.com\/embed\/q9fWzDpsfSw?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<h3>Visualizing the Waves: What Happens When the Source Moves?<\/h3>\n<p>To solve the mystery of why this happens, I created a learning tool using <b>Scratch<\/b>. First, let\u2019s look at the case where the object making the sound (the source) is moving. Imagine looking down at an ambulance emitting sound waves as it drives. You can try it out yourself using the link or the embedded screen below.<\/p>\n<p>You can try it out <a href=\"https:\/\/scratch.mit.edu\/projects\/212941825\/\">here<\/a>.<\/p>\n<p style=\"text-align: center;\"><iframe loading=\"lazy\" src=\"\/\/scratch.mit.edu\/projects\/embed\/212941825\/?autostart=false\" width=\"485\" height=\"402\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\" data-mce-fragment=\"1\"><\/iframe><\/p>\n<p><iframe loading=\"lazy\" title=\"\u30c9\u30c3\u30d7\u30e9\u30fc\u52b9\u679c\u304c\u3088\u304f\u308f\u304b\u308b\u30a4\u30f3\u30bf\u30e9\u6559\u6750[\u79d1\u5b66\u306e\u30cd\u30bf\u5e33] Doppler effect\" width=\"1140\" height=\"855\" src=\"https:\/\/www.youtube.com\/embed\/ops5QOlARcA?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<p>If the sound source is stationary, the width of the waves (wavelength) is the same in the front and the back.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone  wp-image-31350 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2018\/04\/a6e142837a9b3696ab2d7c7dbc277fcd.png\" alt=\"\" width=\"603\" height=\"450\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2018\/04\/a6e142837a9b3696ab2d7c7dbc277fcd.png 956w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2018\/04\/a6e142837a9b3696ab2d7c7dbc277fcd-300x224.png 300w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2018\/04\/a6e142837a9b3696ab2d7c7dbc277fcd-768x574.png 768w\" sizes=\"auto, (max-width: 603px) 100vw, 603px\" \/><\/p>\n<p>But what happens if the source moves to the left? Since the source is &#8220;chasing&#8221; the waves it just emitted, the waves in front get squashed together and become shorter. Conversely, the waves behind are left in the dust, stretching out and becoming longer.<\/p>\n<p>Since shorter waves sound like a <b>higher pitch<\/b> and longer waves sound like a <b>lower pitch<\/b>, the siren sounds lower as the ambulance moves away.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone  wp-image-31348 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2018\/04\/05f9c1793c2388dd320ac8e931f644bc.png\" alt=\"\" width=\"481\" height=\"360\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2018\/04\/05f9c1793c2388dd320ac8e931f644bc.png 958w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2018\/04\/05f9c1793c2388dd320ac8e931f644bc-300x224.png 300w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2018\/04\/05f9c1793c2388dd320ac8e931f644bc-768x574.png 768w\" sizes=\"auto, (max-width: 481px) 100vw, 481px\" \/><\/p>\n<p>If you watch it move to the right, you can see how the wavelength shortens, creating that higher-pitched sound.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone  wp-image-31349 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2018\/04\/36689c8fde861561b13fa7a9d6aa2c47.png\" alt=\"\" width=\"562\" height=\"424\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2018\/04\/36689c8fde861561b13fa7a9d6aa2c47.png 954w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2018\/04\/36689c8fde861561b13fa7a9d6aa2c47-300x226.png 300w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2018\/04\/36689c8fde861561b13fa7a9d6aa2c47-768x580.png 768w\" sizes=\"auto, (max-width: 562px) 100vw, 562px\" \/><\/p>\n<p>Phenomena involving movement can be tricky to explain with just words or still photos, but they click instantly once you see them in motion!<\/p>\n<h3>What If YOU Move? The Observer&#8217;s Perspective<\/h3>\n<p>Another part that people often find confusing is when the <b>observer<\/b> is the one moving. In this case, the actual wavelength of the sound traveling through the air doesn&#8217;t change at all. So why does the pitch still shift?<\/p>\n<p>The answer lies in the number of waves you receive per second. To explain this, I built another simulator from the observer\u2019s point of view. Give it a spin!<\/p>\n<p style=\"text-align: center;\"><iframe loading=\"lazy\" src=\"\/\/scratch.mit.edu\/projects\/embed\/213291649\/?autostart=false\" width=\"485\" height=\"402\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/p>\n<p>You can also see how it works on YouTube:<\/p>\n<p><iframe loading=\"lazy\" title=\"\u89b3\u6e2c\u8005\u304c\u52d5\u304f\u5834\u5408\u306e\u30c9\u30c3\u30d7\u30e9\u30fc\u52b9\u679c\u306e\u30a4\u30f3\u30bf\u30e9\u6559\u6750 Doppler effect\" width=\"1140\" height=\"855\" src=\"https:\/\/www.youtube.com\/embed\/wh6TKiFhTRE?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone  wp-image-31338 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2018\/03\/c01bfeaeb06bd1332b1701022a1224ca.png\" alt=\"\" width=\"595\" height=\"443\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2018\/03\/c01bfeaeb06bd1332b1701022a1224ca.png 964w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2018\/03\/c01bfeaeb06bd1332b1701022a1224ca-300x223.png 300w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2018\/03\/c01bfeaeb06bd1332b1701022a1224ca-768x572.png 768w\" sizes=\"auto, (max-width: 595px) 100vw, 595px\" \/><\/p>\n<p>Let\u2019s say an observer receives 5 sound waves while standing still.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone  wp-image-31339 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2018\/03\/6a3e2b2c16fee7da7160ac9ef7b23471.png\" alt=\"\" width=\"596\" height=\"446\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2018\/03\/6a3e2b2c16fee7da7160ac9ef7b23471.png 964w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2018\/03\/6a3e2b2c16fee7da7160ac9ef7b23471-300x225.png 300w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2018\/03\/6a3e2b2c16fee7da7160ac9ef7b23471-768x575.png 768w\" sizes=\"auto, (max-width: 596px) 100vw, 596px\" \/><\/p>\n<p>However, if the observer moves toward the sound, they bump into waves one after another, receiving maybe 8 waves in the same amount of time. Receiving more waves means the frequency increases\u2014and that makes the <b>pitch sound higher<\/b>.<\/p>\n<p>Think of it like being at the beach: if you stand still, waves hit you at a certain rate. But if you swim out toward the waves, they crash against you much more frequently!<\/p>\n<h3>Perfect for Classrooms or Self-Study!<\/h3>\n<p>I designed these tools specifically for teachers to use while explaining in class. You can easily toggle between &#8220;Stationary,&#8221; &#8220;Moving Right,&#8221; and &#8220;Moving Left.&#8221; Physics can feel intimidating when you only look at formulas, but using visual tools turns that confusion into a &#8220;Eureka!&#8221; moment.<\/p>\n<h3>Inquiries and Collaborations<\/h3>\n<p>Let\u2019s make the wonders of science more accessible! I share easy and fun science experiments you can do at home, along with tips to make them successful. Feel free to explore more!<\/p>\n<p>My &#8220;Science Notebook&#8221; is now a book! Details <a href=\"https:\/\/amzn.to\/42PMCEL\">here<\/a>.<\/p>\n<p>Learn more about the creator, Ken Kuwako, <a href=\"https:\/\/phys-edu.net\/wp\/?page_id=37\">here<\/a>.<\/p>\n<p>For requests (writing, speaking, workshops, TV supervision, etc.), click <a href=\"https:\/\/phys-edu.net\/wp\/?page_id=188\">here<\/a>.<br \/>\n<span class=\"s2\">&#8211; Get updates on <a href=\"https:\/\/x.com\/kuwako\">X (formerly Twitter)<\/a>!<\/span><\/p>\n<p style=\"text-align: center;\"><a href=\"https:\/\/www.youtube.com\/user\/kkuwako\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-35048\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2020\/03\/3d9640dad7bc5538e76f92da1966ee19.jpg\" alt=\"\" width=\"30\" height=\"21\" \/><\/a> Watch experiment videos on the <a href=\"https:\/\/www.youtube.com\/user\/kkuwako?sub_confirmation=1\">Science Channel<\/a>!<\/p>\n<h3>\uff13\u6708\u306e\u30a4\u30c1\u30aa\u30b7\u5b9f\u9a13\uff01<\/h3>\r\n<ul>\r\n<li><a href=\"https:\/\/phys-edu.net\/wp\/?p=44853\">\u62bc\u3057\u82b1\u3092\u4f5c\u308d\u3046\uff01<\/a>\uff1a\u6885\u3084\u685c\u306e\u82b1\u306e\u62bc\u3057\u82b1\u3092\u4f5c\u3063\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u7279\u5225\u306a\u30b1\u30fc\u30b9\u306b\u5165\u308c\u308b\u3068\u3001\u9577\u304f\u4fdd\u5b58\u3067\u304d\u3066\u3001\u3057\u304a\u308a\u306b\u3082\u306a\u308a\u307e\u3059\u3002<\/li>\r\n<\/ul>\r\n<p><a href=\"https:\/\/phys-edu.net\/wp\/?p=44853\"><img class=\"alignnone wp-image-45250 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/04\/6f7f8f2c6502a509617154ad6401e859.jpg\" alt=\"\" width=\"291\" height=\"302\" \/><\/a><\/p>\r\n<h3 style=\"text-align: left;\"><span style=\"font-size: medium;\"><b><strong>\u30c6\u30ec\u30d3\u756a\u7d44\u30fb\u79d1\u5b66\u76e3\u4fee\u7b49\u306e\u304a\u77e5\u3089\u305b<\/strong><\/b><\/span><\/h3>\r\n<ul>\r\n<li>\u300c<a href=\"https:\/\/phys-edu.net\/wp\/?p=59767\">\u6708\u66dc\u304b\u3089\u591c\u66f4\u304b\u3057<\/a>\u300d\uff08\u65e5\u672c\u30c6\u30ec\u30d3\uff09\u306b\u3066\u79d1\u5b66\u76e3\u4fee\u30fb\u51fa\u6f14\u3057\u307e\u3057\u305f\u3002<\/li>\r\n<li><a href=\"https:\/\/phys-edu.net\/wp\/?p=60859\">2\u670827\u65e5\u653e\u9001\u4e88\u5b9a\u300c\u30c1\u30b3\u3061\u3083\u3093\u306b\u53f1\u3089\u308c\u308b\u300d\uff08NHK\uff09\u306e\u79d1\u5b66\u76e3\u4fee\u3057\u307e\u3057\u305f<\/a>\u3002<\/li>\r\n<\/ul>\r\n<h3><span style=\"font-size: medium;\"><b>\u66f8\u7c4d<strong>\u306e\u304a\u77e5\u3089\u305b<\/strong><\/b><\/span><\/h3>\r\n<ul>\r\n<li>1\/27 <a href=\"https:\/\/phys-edu.net\/wp\/?p=59153\">\u300e\u898b\u3048\u306a\u3044\u529b\u3068\u904a\u307c\u3046\uff01\u96fb\u6c17\u30fb\u78c1\u77f3\u30fb\u71b1\u306e\u5b9f\u9a13\u300f\uff08\u5de5\u5b66\u793e\uff09\u3092\u57f7\u7b46\u3057\u307e\u3057\u305f<\/a>\u3002<\/li>\r\n<li><a href=\"https:\/\/phys-edu.net\/wp\/?p=58878\">\u30b5\u30af\u30bb\u30b915 \uff12\u6708\u53f7<\/a>\u306b\u3066\u300c\u6d78\u900f\u5727\u300d\u306b\u95a2\u3059\u308b\u79d1\u5b66\u8a18\u4e8b\u3092\u57f7\u7b46\u3057\u307e\u3057\u305f\u3002<\/li>\r\n<li>\u300e\u5927\u4eba\u306e\u305f\u3081\u306e\u9ad8\u6821\u7269\u7406\u5fa9\u7fd2\u5e33\u300f\uff08\u8b1b\u8ac7\u793e\uff09\u2026\u4e00\u822c\u5411\u3051\u306b\u65e5\u5e38\u306e\u7269\u7406\u306b\u3064\u3044\u3066\u516c\u5f0f\u3092\u5143\u306b\u7d10\u89e3\u304d\u307e\u3057\u305f\u3002<a href=\"https:\/\/phys-edu.net\/wp\/?p=1827\">\u7279\u8a2d\u30b5\u30a4\u30c8<\/a>\u3067\u306f\u5b9f\u9a13\u3092\u591a\u6570\u7d39\u4ecb\u3057\u3066\u3044\u307e\u3059\u3002<strong>\u203b\u5897\u5237\u304c\u304b\u304b\u308a\uff16\u5237\u3068\u306a\u308a\u307e\u3057\u305f\uff082026\/02\/01\uff09 <a href=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2013\/12\/0811159a99f69eeff1a357e3daed84e0.jpg\"><img class=\"alignnone wp-image-10940 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2013\/12\/0811159a99f69eeff1a357e3daed84e0-300x262.jpg\" sizes=\"(max-width: 220px) 100vw, 220px\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2013\/12\/0811159a99f69eeff1a357e3daed84e0-300x262.jpg 300w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2013\/12\/0811159a99f69eeff1a357e3daed84e0.jpg 311w\" alt=\"\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8 2014-07-05 0.43.51\" width=\"220\" height=\"192\" \/><\/a> <\/strong><\/li>\r\n<li>\u300e\u304d\u3081\u308b!\u5171\u901a\u30c6\u30b9\u30c8 \u7269\u7406\u57fa\u790e \u6539\u8a02\u7248\u300f\uff08\u5b66\u7814\uff09\u2026\u3000\u9ad8\u6821\u7269\u7406\u306e\u53c2\u8003\u66f8\u3067\u3059\u3002\u30a4\u30e9\u30b9\u30c8\u3092\u591a\u304f\u3057\u3066\u30a4\u30e1\u30fc\u30b8\u304c\u6301\u3066\u308b\u3088\u3046\u306b\u63cf\u304d\u307e\u3057\u305f\u3002\u6388\u696d\u306b\u3064\u3044\u3066\u3044\u3051\u306a\u3044\u3001\u7269\u7406\u304c\u82e6\u624b\u3001\u305d\u3093\u306a\u751f\u5f92\u306b\u304a\u3059\u3059\u3081\u3067\u3059\u3002<a href=\"https:\/\/phys-edu.net\/wp\/?p=45322\">\u7279\u8a2d\u30b5\u30a4\u30c8<\/a>\u306f\u3053\u3061\u3089\u3002 <a href=\"https:\/\/amzn.to\/4aNldWh\"><img class=\"alignnone wp-image-45718 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/04\/dc1da64a8c8d1422062b4867c0607a1c.jpg\" sizes=\"(max-width: 184px) 100vw, 184px\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/04\/dc1da64a8c8d1422062b4867c0607a1c.jpg 756w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/04\/dc1da64a8c8d1422062b4867c0607a1c-300x269.jpg 300w\" alt=\"\" width=\"184\" height=\"165\" \/><\/a><\/li>\r\n<\/ul>\r\n<h3><span style=\"font-size: medium;\"><b>\u8b1b\u5e2b\u30fb\u30b7\u30e7\u30fc\u30fb\u305d\u306e\u4ed6\u304a\u77e5\u3089\u305b<\/b><\/span><\/h3>\r\n<ul>\r\n<li>3\/20\uff08\u91d1\uff09\u3000\u65e5\u672c\u7406\u79d1\u6559\u80b2\u5b66\u4f1a\u30aa\u30f3\u30e9\u30a4\u30f3\u5168\u56fd\u5927\u4f1a2026\u300c<a href=\"https:\/\/phys-edu.net\/wp\/?p=60439\">\u6163\u6027\u306e\u6cd5\u5247\u306e\u6982\u5ff5\u5f62\u6210\u3092\u76ee\u6307\u3057\u305f\u63a2\u7a76\u7684\u306a\u5b66\u3073\u306e\u5b9f\u8df5\u300d\u306b\u3064\u3044\u3066\u767a\u8868<\/a>\u3057\u307e\u3059\u3002B\u4f1a\u5834 \u7b2c\uff13\u30bb\u30c3\u30b7\u30e7\u30f3\uff1a \u5b66\u7fd2\u6307\u5c0e\u30fb\u6559\u6750\uff08\u4e2d\u5b66\u6821\uff09\u2462\u300011:20-12:20<\/li>\r\n<li>7\/18\uff08\u571f\uff09\u3000<a href=\"https:\/\/phys-edu.net\/wp\/?p=60018\">\u6559\u54e1\u5411\u3051\u5b9f\u9a13\u8b1b\u7fd2\u4f1a\u300c\u30ca\u30ea\u30ab\u30ab\u30b5\u30a4\u30a8\u30f3\u30b9\u30a2\u30ab\u30c7\u30df\u30fc\u300d\u306e\u8b1b\u5e2b\u3092\u3057\u307e\u3059<\/a>\u3002\u304a\u4f1a\u3044\u3057\u307e\u3057\u3087\u3046\u3002<\/li>\r\n<li>10\/10\uff08\u571f\uff09\u3000\u79d8\u5bc6\u5175\u5668\u300c\u5e2f\u96fb\u30ac\u30f3\u300d\u304c\u70b8\u88c2\uff01\u30d3\u30ea\u30d3\u30ea\uff01\u30c9\u30ad\u30c9\u30ad\uff01\u9759\u96fb\u6c17\u30b5\u30a4\u30a8\u30f3\u30b9\u30b7\u30e7\u30fc\uff20\u5343\u8449\u5e02\u79d1\u5b66\u30d5\u30a7\u30b9\u30bf\uff08\u5348\u5f8c\u4e88\u5b9a\uff09<\/li>\r\n<li><span style=\"text-align: center;\">\u5404\u7a2eSNS\u3000<\/span><a style=\"text-align: center;\" href=\"https:\/\/twitter.com\/kuwako\">X(Twitter)<\/a><span style=\"text-align: center;\">\uff0f<\/span><a style=\"text-align: center;\" href=\"https:\/\/www.instagram.com\/science_seeds\/\">instagram<\/a><span style=\"text-align: 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href=\"http:\/\/phys-edu.net\/wp\/?page_id=37\">About<\/a>\u00a0\u2026\u300c\u79d1\u5b66\u306e\u30cd\u30bf\u5e33\u300d\u306e\u30b3\u30f3\u30bb\u30d7\u30c8\u3084\u3001\u904b\u55b6\u8005\u3067\u3042\u308b\u6851\u5b50\u7814\u306e\u30d7\u30ed\u30d5\u30a3\u30fc\u30eb\u30fb\u60f3\u3044\u3092\u307e\u3068\u3081\u3066\u3044\u307e\u3059\u3002<\/li>\r\n<li><a href=\"https:\/\/phys-edu.net\/wp\/?page_id=188\">\u304a\u554f\u3044\u5408\u308f\u305b<\/a>\u00a0\u2026\u5b9f\u9a13\u6559\u5ba4\u306e\u3054\u4f9d\u983c\u3001\u57f7\u7b46\u30fb\u8b1b\u6f14\u306e\u76f8\u8ac7\u3001\u79d1\u5b66\u76e3\u4fee\u7b49\u306f\u3053\u3061\u3089\u306e\u30d5\u30a9\u30fc\u30e0\u304b\u3089\u304a\u5bc4\u305b\u304f\u3060\u3055\u3044\u3002<\/li>\r\n<\/ul>\r\n","protected":false},"excerpt":{"rendered":"<p>I am Ken Kuwako, a Science Trainer. Every day is an experiment! Have you ever been walking down the street whe [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":31339,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_sitemap_exclude":false,"_sitemap_priority":"","_sitemap_frequency":"","vkexunit_cta_each_option":"","footnotes":""},"categories":[781],"tags":[],"class_list":["post-60519","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-science-en"],"jetpack_featured_media_url":"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2018\/03\/6a3e2b2c16fee7da7160ac9ef7b23471.png","jetpack-related-posts":[{"id":59869,"url":"https:\/\/phys-edu.net\/wp\/?p=59869&lang=en","url_meta":{"origin":60519,"position":0},"title":"Hear the Siren Shift! Recreate the Changing Sound of an Ambulance with Your Smartphone (The Doppler Effect)","author":"\u6851\u5b50 \u7814","date":"2026\u5e742\u67082\u65e5","format":false,"excerpt":"I am Ken Kuwako, your science trainer. Every day i\u2026","rel":"","context":"Science","block_context":{"text":"Science","link":"https:\/\/phys-edu.net\/wp\/?cat=781&lang=en"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/02\/%E3%82%B9%E3%82%AF%E3%83%AA%E3%83%BC%E3%83%B3%E3%82%B7%E3%83%A7%E3%83%83%E3%83%88-2026-02-02-4.45.46.jpeg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/02\/%E3%82%B9%E3%82%AF%E3%83%AA%E3%83%BC%E3%83%B3%E3%82%B7%E3%83%A7%E3%83%83%E3%83%88-2026-02-02-4.45.46.jpeg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/02\/%E3%82%B9%E3%82%AF%E3%83%AA%E3%83%BC%E3%83%B3%E3%82%B7%E3%83%A7%E3%83%83%E3%83%88-2026-02-02-4.45.46.jpeg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/02\/%E3%82%B9%E3%82%AF%E3%83%AA%E3%83%BC%E3%83%B3%E3%82%B7%E3%83%A7%E3%83%83%E3%83%88-2026-02-02-4.45.46.jpeg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":56932,"url":"https:\/\/phys-edu.net\/wp\/?p=56932&lang=en","url_meta":{"origin":60519,"position":1},"title":"The 100-Yen Toy That Makes Invisible Sound and Earthquakes Visible","author":"\u6851\u5b50 \u7814","date":"2025\u5e7412\u67088\u65e5","format":false,"excerpt":"Science Trainer, Ken Kuwako. Every Day is an Exper\u2026","rel":"","context":"Science","block_context":{"text":"Science","link":"https:\/\/phys-edu.net\/wp\/?cat=781&lang=en"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2016\/10\/66c19942ab4ba346fdb64ccc04cde373.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2016\/10\/66c19942ab4ba346fdb64ccc04cde373.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2016\/10\/66c19942ab4ba346fdb64ccc04cde373.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2016\/10\/66c19942ab4ba346fdb64ccc04cde373.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":57091,"url":"https:\/\/phys-edu.net\/wp\/?p=57091&lang=en","url_meta":{"origin":60519,"position":2},"title":"The Thermos is a Flute: The Science of the Rising Pitch When Pouring Water","author":"\u6851\u5b50 \u7814","date":"2025\u5e7412\u670811\u65e5","format":false,"excerpt":"I'm Ken Kuwako, your Science Trainer. Every day is\u2026","rel":"","context":"Science","block_context":{"text":"Science","link":"https:\/\/phys-edu.net\/wp\/?cat=781&lang=en"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/12\/%E3%82%B9%E3%82%AF%E3%83%AA%E3%83%BC%E3%83%B3%E3%82%B7%E3%83%A7%E3%83%83%E3%83%88-2025-12-11-4.39.27.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/12\/%E3%82%B9%E3%82%AF%E3%83%AA%E3%83%BC%E3%83%B3%E3%82%B7%E3%83%A7%E3%83%83%E3%83%88-2025-12-11-4.39.27.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/12\/%E3%82%B9%E3%82%AF%E3%83%AA%E3%83%BC%E3%83%B3%E3%82%B7%E3%83%A7%E3%83%83%E3%83%88-2025-12-11-4.39.27.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/12\/%E3%82%B9%E3%82%AF%E3%83%AA%E3%83%BC%E3%83%B3%E3%82%B7%E3%83%A7%E3%83%83%E3%83%88-2025-12-11-4.39.27.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":56304,"url":"https:\/\/phys-edu.net\/wp\/?p=56304&lang=en","url_meta":{"origin":60519,"position":3},"title":"Can You Touch Sound? The Simple Home Experiments That Prove Sound Is Energy","author":"\u6851\u5b50 \u7814","date":"2025\u5e7411\u670824\u65e5","format":false,"excerpt":"I'm Ken Kuwako, your Science Trainer. Every day is\u2026","rel":"","context":"Science","block_context":{"text":"Science","link":"https:\/\/phys-edu.net\/wp\/?cat=781&lang=en"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/09\/957cb137befeecbf9acfc20137773f67.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/09\/957cb137befeecbf9acfc20137773f67.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/09\/957cb137befeecbf9acfc20137773f67.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/09\/957cb137befeecbf9acfc20137773f67.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":51851,"url":"https:\/\/phys-edu.net\/wp\/?p=51851&lang=en","url_meta":{"origin":60519,"position":4},"title":"A Fun &#8220;Oscilloscope&#8221; Web App Anyone Can Touch! 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Let's have f\u2026","rel":"","context":"Science","block_context":{"text":"Science","link":"https:\/\/phys-edu.net\/wp\/?cat=781&lang=en"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/05\/67d7ccf685349967029f5f0efb9e578a.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/05\/67d7ccf685349967029f5f0efb9e578a.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/05\/67d7ccf685349967029f5f0efb9e578a.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/05\/67d7ccf685349967029f5f0efb9e578a.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":57218,"url":"https:\/\/phys-edu.net\/wp\/?p=57218&lang=en","url_meta":{"origin":60519,"position":5},"title":"See the Hidden Shapes of Sound! Exploring Resonance with a Tablet and Water (Air Column Resonance Experiment)","author":"\u6851\u5b50 \u7814","date":"2025\u5e7412\u670813\u65e5","format":false,"excerpt":"Hello, this is Ken Kuwako, your Science Trainer. 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