Metamaterials are artificial assemblies of known materials in particular arrangements that result in novel properties not encountered in naturally occurring materials. Among many applications, they hold great promise for vibration insulation, noise control, wave-guiding and energy harvesting technologies. In our work we use reconfigurable LEGO pieces and laser Doppler vibrometry to ...<\/p>","imageObject":{"variants":[{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/1\/9\/csm_wave-propagation-metamaterials_5632d5d112.jpg.webp","type":"image\/webp","name":"default","width":"570","breakpoint":"1200"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/1\/9\/csm_wave-propagation-metamaterials_5632d5d112.jpg","name":"default","width":"570","breakpoint":"1200"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/1\/9\/csm_wave-propagation-metamaterials_b6e2d64fc8.jpg.webp","type":"image\/webp","name":"large","width":"900","breakpoint":"992"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/1\/9\/csm_wave-propagation-metamaterials_b6e2d64fc8.jpg","name":"large","width":"900","breakpoint":"992"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/1\/9\/csm_wave-propagation-metamaterials_c0d56424e3.jpg.webp","type":"image\/webp","name":"medium","width":"1380","breakpoint":"768"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/1\/9\/csm_wave-propagation-metamaterials_c0d56424e3.jpg","name":"medium","width":"1380","breakpoint":"768"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/1\/9\/csm_wave-propagation-metamaterials_9ce263198f.jpg.webp","type":"image\/webp","name":"extrasmall","width":"640","breakpoint":"320"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/1\/9\/csm_wave-propagation-metamaterials_9ce263198f.jpg","name":"extrasmall","width":"640","breakpoint":"320"}],"default":{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/1\/9\/csm_wave-propagation-metamaterials_5632d5d112.jpg","alt":"","title":""}},"link":"https:\/\/magazine.polytec.com\/uk\/wave-propagation-and-vibrations","origUid":7185,"readingTime":"6 min","subline":"Wave propagation and vibrations of LEGO assemblies","tags":[{"title":"Civil & structural engineering","uid":7},{"title":"Materials research & NDT","uid":9}],"technologies":[{"title":"Vibrometry","uid":214}],"title":"Using toys to investigate the complex physics of quasi-periodic metamaterials","uid":7189,"visits":57},{"authors":[],"datetime":null,"description":"

More and more, the increasing stress on infrastructures provides the challenge of investigating and evaluating the existing structures with regard to safety and the resulting remaining useful life. Reliable, technically feasible and economical solutions for metrological monitoring are necessary in order to guarantee structural safety and fitness for purpose.<\/p>","imageObject":{"variants":[{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/e\/5\/csm_validation-of-bridge-superstructures_f04c99bf7c.jpg.webp","type":"image\/webp","name":"default","width":"570","breakpoint":"1200"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/e\/5\/csm_validation-of-bridge-superstructures_f04c99bf7c.jpg","name":"default","width":"570","breakpoint":"1200"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/e\/5\/csm_validation-of-bridge-superstructures_307755a405.jpg.webp","type":"image\/webp","name":"large","width":"900","breakpoint":"992"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/e\/5\/csm_validation-of-bridge-superstructures_307755a405.jpg","name":"large","width":"900","breakpoint":"992"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/magazine\/vibrometry\/image\/validation-of-bridge-superstructures.jpg.webp","type":"image\/webp","name":"medium","width":"1380","breakpoint":"768"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/magazine\/vibrometry\/image\/validation-of-bridge-superstructures.jpg","name":"medium","width":"1380","breakpoint":"768"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/e\/5\/csm_validation-of-bridge-superstructures_51f3a3435e.jpg.webp","type":"image\/webp","name":"extrasmall","width":"640","breakpoint":"320"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/e\/5\/csm_validation-of-bridge-superstructures_51f3a3435e.jpg","name":"extrasmall","width":"640","breakpoint":"320"}],"default":{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/e\/5\/csm_validation-of-bridge-superstructures_f04c99bf7c.jpg","alt":"Bridge","title":""}},"link":"https:\/\/magazine.polytec.com\/uk\/validation-on-bridge-superstructures","origUid":7053,"readingTime":"5 min","subline":"Validation on bridge superstructures","tags":[{"title":"General R&D","uid":6},{"title":"Civil & structural engineering","uid":7}],"technologies":[{"title":"Vibrometry","uid":214}],"title":"A modal-based monitoring system","uid":7056,"visits":162},{"authors":[],"datetime":null,"description":"

Noise protection and control play a major role in both professional and private environments. Airborne sound measurements help identify acoustic paths as a means of noise reduction as standard testing method. The underlying sound generation is typically achieved by using omnidirectional sound sources ...<\/p>","imageObject":{"variants":[{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/5\/5\/csm_robovib-ntek_1945e40970.jpg.webp","type":"image\/webp","name":"default","width":"570","breakpoint":"1200"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/5\/5\/csm_robovib-ntek_1945e40970.jpg","name":"default","width":"570","breakpoint":"1200"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/5\/5\/csm_robovib-ntek_384f5ee757.jpg.webp","type":"image\/webp","name":"large","width":"900","breakpoint":"992"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/5\/5\/csm_robovib-ntek_384f5ee757.jpg","name":"large","width":"900","breakpoint":"992"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/magazine\/vibrometry\/image\/robovib-ntek.jpg.webp","type":"image\/webp","name":"medium","width":"1380","breakpoint":"768"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/magazine\/vibrometry\/image\/robovib-ntek.jpg","name":"medium","width":"1380","breakpoint":"768"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/5\/5\/csm_robovib-ntek_883f2537f7.jpg.webp","type":"image\/webp","name":"extrasmall","width":"640","breakpoint":"320"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/5\/5\/csm_robovib-ntek_883f2537f7.jpg","name":"extrasmall","width":"640","breakpoint":"320"}],"default":{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/5\/5\/csm_robovib-ntek_1945e40970.jpg","alt":"","title":""}},"link":"https:\/\/magazine.polytec.com\/uk\/analyzing-operational-deflection-shapes-on-loudspeakers","origUid":6845,"readingTime":"4 min","subline":"Loudspeakers for noise protection","tags":[{"title":"Automotive & aerospace","uid":3},{"title":"Acoustics & ultrasonics","uid":2},{"title":"Civil & structural engineering","uid":7},{"title":"Materials research & NDT","uid":9}],"technologies":[{"title":"Vibrometry","uid":214}],"title":"Analyzing operational deflection shapes on loudspeakers","uid":6847,"visits":171}],"pagination":[],"sorting":[{"title":"Neueste","link":"https:\/\/magazine.polytec.com\/uk\/api\/articles\/get?tx_polytecmagazinepackage_magazine%5Bfilter%5D%5Bsorting%5D=newest&tx_polytecmagazinepackage_magazine%5Bfilter%5D%5Btags%5D%5B0%5D=7&cHash=59e6b1b67cc3aebe651cbf28fca4d78f","active":true},{"title":"Meistgelesene","link":"https:\/\/magazine.polytec.com\/uk\/api\/articles\/get?tx_polytecmagazinepackage_magazine%5Bfilter%5D%5Bsorting%5D=mostread&tx_polytecmagazinepackage_magazine%5Bfilter%5D%5Btags%5D%5B0%5D=7&cHash=306bf053b66ed969f741ead54314bdde","active":false}],"filtersState":{"tags":[{"removeLink":"https:\/\/magazine.polytec.com\/uk\/api\/articles\/get","title":"Civil & structural engineering","uid":7}],"technologies":[]},"filters":{"applications":[{"active":false,"enabled":true,"link":"https:\/\/magazine.polytec.com\/uk\/api\/articles\/get?tx_polytecmagazinepackage_magazine%5Bfilter%5D%5Btags%5D%5B0%5D=7&tx_polytecmagazinepackage_magazine%5Bfilter%5D%5Btags%5D%5B1%5D=2&cHash=cd0833045860dbd818d9bce13d1197a8","pid":6051,"removeLink":"","title":"Acoustics & ultrasonics","uid":2},{"active":false,"enabled":true,"link":"https:\/\/magazine.polytec.com\/uk\/api\/articles\/get?tx_polytecmagazinepackage_magazine%5Bfilter%5D%5Btags%5D%5B0%5D=7&tx_polytecmagazinepackage_magazine%5Bfilter%5D%5Btags%5D%5B1%5D=3&cHash=8caac776e005131307ea45464a667ac5","pid":6051,"removeLink":"","title":"Automotive & aerospace","uid":3},{"active":false,"enabled":true,"link":"https:\/\/magazine.polytec.com\/uk\/api\/articles\/get?tx_polytecmagazinepackage_magazine%5Bfilter%5D%5Btags%5D%5B0%5D=7&tx_polytecmagazinepackage_magazine%5Bfilter%5D%5Btags%5D%5B1%5D=4&cHash=bdb5787c078095d8c3e699b49db915d8","pid":6051,"removeLink":"","title":"Biology & medical","uid":4},{"active":true,"enabled":true,"link":"https:\/\/magazine.polytec.com\/uk\/api\/articles\/get?tx_polytecmagazinepackage_magazine%5Bfilter%5D%5Btags%5D%5B0%5D=7&tx_polytecmagazinepackage_magazine%5Bfilter%5D%5Btags%5D%5B1%5D=7&cHash=d9b4472604193c6654188d79a6171a38","pid":6051,"removeLink":"https:\/\/magazine.polytec.com\/uk\/api\/articles\/get","title":"Civil & structural engineering","uid":7},{"active":false,"enabled":true,"link":"https:\/\/magazine.polytec.com\/uk\/api\/articles\/get?tx_polytecmagazinepackage_magazine%5Bfilter%5D%5Btags%5D%5B0%5D=7&tx_polytecmagazinepackage_magazine%5Bfilter%5D%5Btags%5D%5B1%5D=5&cHash=c5bbd99b9e8b7f6906472834bd5c6cb1","pid":6051,"removeLink":"","title":"Electronics, semicon, solar","uid":5},{"active":false,"enabled":true,"link":"https:\/\/magazine.polytec.com\/uk\/api\/articles\/get?tx_polytecmagazinepackage_magazine%5Bfilter%5D%5Btags%5D%5B0%5D=7&tx_polytecmagazinepackage_magazine%5Bfilter%5D%5Btags%5D%5B1%5D=6&cHash=c4e99eaef1c9d99eb6bf103f1cfc262f","pid":6051,"removeLink":"","title":"General R&D","uid":6},{"active":false,"enabled":true,"link":"https:\/\/magazine.polytec.com\/uk\/api\/articles\/get?tx_polytecmagazinepackage_magazine%5Bfilter%5D%5Btags%5D%5B0%5D=7&tx_polytecmagazinepackage_magazine%5Bfilter%5D%5Btags%5D%5B1%5D=8&cHash=d84436b4fb42176592ba6fc89ff4a265","pid":6051,"removeLink":"","title":"Mechanical & precision engineering","uid":8},{"active":false,"enabled":true,"link":"https:\/\/magazine.polytec.com\/uk\/api\/articles\/get?tx_polytecmagazinepackage_magazine%5Bfilter%5D%5Btags%5D%5B0%5D=7&tx_polytecmagazinepackage_magazine%5Bfilter%5D%5Btags%5D%5B1%5D=9&cHash=7af5c50a5833a6c7bcbac59a86791961","pid":6051,"removeLink":"","title":"Materials research & NDT","uid":9},{"active":false,"enabled":true,"link":"https:\/\/magazine.polytec.com\/uk\/api\/articles\/get?tx_polytecmagazinepackage_magazine%5Bfilter%5D%5Btags%5D%5B0%5D=7&tx_polytecmagazinepackage_magazine%5Bfilter%5D%5Btags%5D%5B1%5D=10&cHash=e2271b5748572f2e5e8c56c64b4e0224","pid":6051,"removeLink":"","title":"Micro & nanotechnology","uid":10},{"active":false,"enabled":true,"link":"https:\/\/magazine.polytec.com\/uk\/api\/articles\/get?tx_polytecmagazinepackage_magazine%5Bfilter%5D%5Btags%5D%5B0%5D=7&tx_polytecmagazinepackage_magazine%5Bfilter%5D%5Btags%5D%5B1%5D=12&cHash=a4924d0b0a41665daaccfa7a9738130c","pid":6051,"removeLink":"","title":"Production, process & quality","uid":12}],"technologies":[{"active":false,"enabled":true,"link":"https:\/\/magazine.polytec.com\/uk\/api\/articles\/get?tx_polytecmagazinepackage_magazine%5Bfilter%5D%5Btags%5D%5B0%5D=7&tx_polytecmagazinepackage_magazine%5Bfilter%5D%5Btechnologies%5D%5B0%5D=214&cHash=9975f796215062ee4dfe5d005017cd9f","title":"Vibrometry","uid":214},{"active":false,"enabled":false,"link":"https:\/\/magazine.polytec.com\/uk\/api\/articles\/get?tx_polytecmagazinepackage_magazine%5Bfilter%5D%5Btags%5D%5B0%5D=7&tx_polytecmagazinepackage_magazine%5Bfilter%5D%5Btechnologies%5D%5B0%5D=213&cHash=144c8b2e63a5a9664ff31647c4c2bf34","title":"Velocimetry","uid":213},{"active":false,"enabled":false,"link":"https:\/\/magazine.polytec.com\/uk\/api\/articles\/get?tx_polytecmagazinepackage_magazine%5Bfilter%5D%5Btags%5D%5B0%5D=7&tx_polytecmagazinepackage_magazine%5Bfilter%5D%5Btechnologies%5D%5B0%5D=212&cHash=f4c2161acee6362406d4cb5de6445dd1","title":"Surface Metrology","uid":212}]},"filtersResetUrl":"https:\/\/magazine.polytec.com\/uk\/api\/articles\/get?type=6000","url":"\/uk?tx_polytecmagazinepackage_magazine%5Bfilter%5D%5Btags%5D%5B0%5D=7&cHash=0557d607d1d5d2aa3e67cc5a7d928b38","translations":{"magazine":"Polytec Magazine","subline":"Welcome to our web magazine. Read through user articles, research reports and technology trends – and experience measurement technology from all sides.","choose_interests":"Choose interests","applications":"Areas of application","technologies":"Technology areas","sort_by":"Sort by","newest":"Most recent","most_read":"Most read","choose_applications":"Choose Applications","choose_technologies":"Choose Technologies","reset_all":"Reset all"}}