{"id":243407,"date":"2026-08-30T21:05:23","date_gmt":"2026-08-31T02:05:23","guid":{"rendered":"https:\/\/lifeboat.com\/blog\/2026\/08\/sonic-microrobots-burst-into-motion-without-batteries-or-motors"},"modified":"2026-08-30T21:05:23","modified_gmt":"2026-08-31T02:05:23","slug":"sonic-microrobots-burst-into-motion-without-batteries-or-motors","status":"publish","type":"post","link":"https:\/\/lifeboat.com\/blog\/2026\/08\/sonic-microrobots-burst-into-motion-without-batteries-or-motors","title":{"rendered":"Sonic microrobots burst into motion without batteries or motors"},"content":{"rendered":"<p><a class=\"aligncenter blog-photo\" href=\"https:\/\/lifeboat.com\/blog.images\/sonic-microrobots-burst-into-motion-without-batteries-or-motors.jpg\"><\/a><\/p>\n<p>Not just any sound, but specifically Helmholtz resonance. In simple words, it\u2019s the same phenomenon that happens when you blow air across the neck of a bottle. The air trapped inside the bottle vibrates strongly at a certain frequency \u2013 that\u2019s why you can hear a humming sound. A glass bottle is an example of what scientists call an acoustic cavity. A cavity can really be any hollow structure, round or bell-shaped, made from 3D-printed plastics, glass, or rubber-like polymers.<\/p>\n<p>When sound waves make the air trapped inside a cavity vibrate, the cavity creates a concentrated stream of air going out. The air coming back in is more spread out than the air going out, and this imbalance is what produces the pushing force, or thrust, needed to move an object.<\/p>\n<p>This is not the first time scientists have used sound to move things. Researchers have long known how to <a class=\"\" href=\"https:\/\/refractor.io\/science\/sound-tweezers-levitate-and-manipulate-small-objects-for-noninvasive-surgery-and-3d-displays\/\" target=\"_blank\" data-cms-ai=\"0\">levitate objects with sound waves<\/a>, but there is an important difference here: in the previous experiments, the passive objects relied on external sound waves to physically push them. But in the current research, the scientists found a way to harness ambient acoustic energy and convert it into mechanical thrust \u2013 using sound to generate movement.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Not just any sound, but specifically Helmholtz resonance. In simple words, it\u2019s the same phenomenon that happens when you blow air across the neck of a bottle. The air trapped inside the bottle vibrates strongly at a certain frequency \u2013 that\u2019s why you can hear a humming sound. A glass bottle is an example of [\u2026]<\/p>\n","protected":false},"author":396,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1489,1497],"tags":[],"class_list":["post-243407","post","type-post","status-publish","format-standard","hentry","category-3d-printing","category-energy"],"_links":{"self":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/243407","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/users\/396"}],"replies":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/comments?post=243407"}],"version-history":[{"count":0,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/243407\/revisions"}],"wp:attachment":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/media?parent=243407"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/categories?post=243407"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/tags?post=243407"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}