{"id":461,"date":"2017-05-29T17:57:40","date_gmt":"2017-05-29T15:57:40","guid":{"rendered":"http:\/\/s465217036.onlinehome.fr\/TravNS\/?p=461"},"modified":"2021-05-18T20:11:32","modified_gmt":"2021-05-18T18:11:32","slug":"on-a-teste-lefreque","status":"publish","type":"post","link":"https:\/\/latraversiere.fr\/en\/webzine\/en-pratique\/on-a-teste-lefreque\/","title":{"rendered":"On a test\u00e9 LEFREQUE"},"content":{"rendered":"<p>LEFREQUE, nom \u00e9tonnant donn\u00e9 \u00e0 deux petites plaques en m\u00e9tal incurv\u00e9es et pos\u00e9es l\u2019une sur l\u2019autre, qui promet \u00eatre une r\u00e9volution acoustique pour tout instrument \u00e0 vent. Invent\u00e9 par le saxophoniste &amp; flutiste Hans Kuijt, cet accessoire fait beaucoup parl\u00e9 de lui.<br \/>\nAlors, v\u00e9rit\u00e9 ou intox\u00a0?<br \/>\nNous avons voulu en savoir plus, et avons donc d\u00e9cid\u00e9 de nous rendre chez le revendeur exclusif de cet accessoire, \u00e0 Paris, Feeling Music, pour l\u2019essayer et comprendre comment \u00e7a marche.<\/p>\n<h4><span style=\"color: #32a3c3;\">Mod\u00e8les et Prix<\/span><\/h4>\n<p>Il existe plusieurs mod\u00e8les de Lefreque adapt\u00e9s \u00e0 chaque type d\u2019instruments, dans des mat\u00e9riaux allant du Laiton au plaqu\u00e9 Or. Les prix varient ainsi entre 45\u20ac et 400\u20ac. Vous trouverez tous les prix sur le site de Feeling Musique\u00a0: http:\/\/www.feelingmusique.com\/<br \/>\nNous avons test\u00e9 le mod\u00e8le 33mm en plaqu\u00e9 argent.<\/p>\n<figure id=\"attachment_472\" aria-describedby=\"caption-attachment-472\" style=\"width: 668px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" class=\"wp-image-472 size-full\" src=\"http:\/\/s465217036.onlinehome.fr\/TravNS\/wp-content\/uploads\/2017\/05\/lefreque33_mm.jpg\" alt=\"Les diff\u00e9rentes versions de LEFREQUE\" width=\"668\" height=\"176\" srcset=\"https:\/\/latraversiere.fr\/wp-content\/uploads\/2017\/05\/lefreque33_mm.jpg 668w, https:\/\/latraversiere.fr\/wp-content\/uploads\/2017\/05\/lefreque33_mm-300x79.jpg 300w, https:\/\/latraversiere.fr\/wp-content\/uploads\/2017\/05\/lefreque33_mm-180x47.jpg 180w, https:\/\/latraversiere.fr\/wp-content\/uploads\/2017\/05\/lefreque33_mm-600x158.jpg 600w\" sizes=\"(max-width: 668px) 100vw, 668px\" \/><figcaption id=\"caption-attachment-472\" class=\"wp-caption-text\">Les diff\u00e9rentes versions de LEFREQUE<\/figcaption><\/figure>\n<h4><span style=\"color: #32a3c3;\">Fonctionnement<\/span><\/h4>\n<p>Nous\u00a0avons compris de nos diff\u00e9rentes discussions que cet accessoire permet une homog\u00e9n\u00e9isation des vibrations entre la t\u00eate de la fl\u00fbte et le corps. Ainsi, Lefreque permettrait de limiter les partiels non harmoniques, c\u2019est \u00e0 dire les fr\u00e9quences qui ne sont pas des multiples entiers du son fondamental. M\u00eame s\u2019il s\u2019agit apparemment d\u2019une \u00e9vidence pour les acousticiens, l\u2019explication scientifique du ph\u00e9nom\u00e8ne reste difficile \u00e0 expliquer par les inventeurs et vendeurs.<\/p>\n<h4><span style=\"color: #32a3c3;\">Notre Test<\/span><\/h4>\n<h5>D\u00e9ballage et Montage<\/h5>\n<p>Lefreque est livr\u00e9 dans une petite boite en plastique orange\u00a0; un packaging classique mais un peu cheap \u00e0 notre gout\u2026 Dans la boite, on trouve les deux plaques plant\u00e9es dans un matelas en polyur\u00e9thanne ainsi qu\u2019un set d\u2019\u00e9lastiques de plusieurs tailles pour une adaptation plus facile \u00e0 tout type d\u2019instrument.<br \/>\nIl faut avouer que le premier montage sur la fl\u00fbte n\u2019est pas chose \u00e9vidente\u00a0; non pas que ce soit compliqu\u00e9, mais le maintien des deux plaques par les deux \u00e9lastiques aux extr\u00e9mit\u00e9s demande un peu de patience. Enfin, on prend assez vite le coup de main, et au bout du troisi\u00e8me, quatri\u00e8me montage, le montage se fait plut\u00f4t rapidement.<\/p>\n\n\n<div id=\"d\u00e9ballage\" class=\"gss-container\">\n\t<div class=\"cycle-slideshow\" \n\t\tdata-cycle-slides=\"> a\"\n\t\tdata-cycle-paused=\"true\"\n\t\tdata-cycle-prev=\"#d\u00e9ballage_prev\"\n\t\tdata-cycle-next=\"#d\u00e9ballage_next\"\n\t\tdata-cycle-pager=\"#d\u00e9ballage_pager\"\n\t\tdata-cycle-pager-template=\"<a href=#>&nbsp;<\/a>\"\n\t\tdata-cycle-speed=\"750\"\n\t\tdata-cycle-caption=\"#d\u00e9ballage_captions\"\n\t\tdata-cycle-caption-template=\"{{cycleCaption}}\"\n\t\t>\n\t\t\t<div id=\"d\u00e9ballage_pager\" class=\"gss-pager\"><\/div>\n\t\t\t<a class=\"no-link\" data-cycle-caption=\"La bo\u00eete en plastique de LEFREQUE fait un peu cheap...\"><img src=\"https:\/\/latraversiere.fr\/wp-content\/uploads\/2017\/05\/TRAV-La-boite-LEFREQUE-1024x682.jpg\" title=\"TRAV-La-boite-LEFREQUE\" alt=\"TRAV-La-boite-LEFREQUE\" \/><\/a>\n\n\t\t\t<a class=\"no-link\" data-cycle-caption=\"Int\u00e9rieur de la bo\u00eete\"><img src=\"https:\/\/latraversiere.fr\/wp-content\/uploads\/2017\/05\/TRAV-Interieur-boite-LEFREQUE-1024x682.jpg\" title=\"TRAV-Interieur-boite-LEFREQUE\" alt=\"TRAV-Interieur-boite-LEFREQUE\" \/><\/a>\n\n\t\t\t<a class=\"no-link\" data-cycle-caption=\"Contenu de la bo\u00eete avec les \u00e9lastiques et les deux plaques (mod\u00e8le Argent\u00e9)\"><img src=\"https:\/\/latraversiere.fr\/wp-content\/uploads\/2017\/05\/TRAV-Interieur-boite-LEFREQUE-1-1024x682.jpg\" title=\"TRAV-Interieur-boite-LEFREQUE-1\" alt=\"TRAV-Interieur-boite-LEFREQUE-1\" \/><\/a>\n\n\t\t\t<a class=\"no-link\" data-cycle-caption=\"Rendu une fois mis en place sur la fl\u00fbte\"><img src=\"https:\/\/latraversiere.fr\/wp-content\/uploads\/2017\/05\/TRAV-LEFREQUE-sur-flute-1-1024x682.jpg\" title=\"TRAV-LEFREQUE-sur-flute-1\" alt=\"TRAV-LEFREQUE-sur-flute-1\" \/><\/a>\n\n\t\t\t<a class=\"no-link\" data-cycle-caption=\"Rendu une fois mis en place sur la fl\u00fbte\"><img src=\"https:\/\/latraversiere.fr\/wp-content\/uploads\/2017\/05\/TRAV-LEFREQUE-sur-flute-1024x682.jpg\" title=\"TRAV-LEFREQUE-sur-flute-2\" alt=\"TRAV-LEFREQUE-sur-flute-2\" \/><\/a>\n\t<\/div>\n\t<div class=\"gss-info\">\n\t\t<div class=\"gss-nav\"><div id=\"d\u00e9ballage_prev\" class=\"gss-prev\">&lt;<\/div><div id=\"d\u00e9ballage_play\" class=\"gss-play\">&#9658;<\/div><div id=\"d\u00e9ballage_next\" class=\"gss-next\">&gt;<\/div><\/div><div class=\"gss-long-cap\">Contenu de la bo\u00eete avec les \u00e9lastiques et les deux plaques (mod\u00e8le Argent\u00e9)<\/div><div id=\"d\u00e9ballage_captions\" class=\"gss-captions\"><\/div>\n\t<\/div>\n<\/div>\n\n\n<h5>Nos impressions<\/h5>\n<p>Comme tout musicien (classique de surcroit), notre premi\u00e8re r\u00e9action vis \u00e0 vis de ce type d\u2019accessoire a \u00e9t\u00e9\u00a0: comment ce petit truc pourrait am\u00e9liorer le son de ma fl\u00fbte t\u00eate Argent massif, voire au contraire, n\u2019y a t il pas un risque de la rayer\u2026<br \/>\nApr\u00e8s avoir \u00e9t\u00e9 rassur\u00e9 par les vendeurs, les 2 plaques ont \u00e9t\u00e9 pos\u00e9es. Les premi\u00e8res en Laiton. Aucune diff\u00e9rence\u00a0! Cela nous conforte dans notre id\u00e9e de penser que tout ceci n\u2019est qu\u2019un gag. On essai alors la plaque Argent. A\u00efe, l\u00e0 ca marche\u00a0; idem avec la plaque argent\u00e9e. On sent une diff\u00e9rence, notamment dans les aig\u00fces et les graves, les notes les plus difficiles \u00e0 faire sonner passent avec moins d\u2019effort, surtout dans le piano. Plus qu\u2019une am\u00e9lioration nette du son, on a surtout l\u2019impression de moins se crisper, ce qui \u00e0 un c\u00f4t\u00e9 rassurant et permet donc de ne pas appr\u00e9hender ces notes plus difficiles.<\/p>\n<h5>Banc d\u2019essai<\/h5>\n<p>Pour essayer de comprendre le ph\u00e9nom\u00e8ne de mani\u00e8re plus scientifique et moins subjective, nous avons mesur\u00e9 les harmoniques de notre fl\u00fbte sur les notes La et Do avec et sans Lefreque. Les graphiques ci-contre donnent l\u2019analyse spectrale pour ces deux notes.<\/p>\n\n\n<div id=\"graphiques\" class=\"gss-container\">\n\t<div class=\"cycle-slideshow\" \n\t\tdata-cycle-slides=\"> a\"\n\t\tdata-cycle-paused=\"true\"\n\t\tdata-cycle-prev=\"#graphiques_prev\"\n\t\tdata-cycle-next=\"#graphiques_next\"\n\t\tdata-cycle-pager=\"#graphiques_pager\"\n\t\tdata-cycle-pager-template=\"<a href=#>&nbsp;<\/a>\"\n\t\tdata-cycle-speed=\"750\"\n\t\tdata-cycle-caption=\"#graphiques_captions\"\n\t\tdata-cycle-caption-template=\"{{cycleCaption}}\"\n\t\t>\n\t\t\t<div id=\"graphiques_pager\" class=\"gss-pager\"><\/div>\n\t\t\t<a class=\"image-lightbox\" href=\"https:\/\/latraversiere.fr\/en\/webzine\/en-pratique\/on-a-teste-lefreque\/attachment\/lefreque-do-graph\/\" data-cycle-caption=\"Mesure des harmoniques avec et sans LEFREQUE sur la note Do\"><img src=\"https:\/\/latraversiere.fr\/wp-content\/uploads\/2017\/05\/LEFREQUE-Do-Graph.png\" title=\"LEFREQUE-Do Graph\" alt=\"LEFREQUE-Do Graph\" \/><\/a>\n\n\t\t\t<a class=\"image-lightbox\" href=\"https:\/\/latraversiere.fr\/en\/webzine\/en-pratique\/on-a-teste-lefreque\/attachment\/lefreque-do-courbe\/\" data-cycle-caption=\"Mesure des harmoniques avec et sans LEFREQUE sur la note Do\"><img src=\"https:\/\/latraversiere.fr\/wp-content\/uploads\/2017\/05\/LEFREQUE-Do-Courbe.png\" title=\"LEFREQUE-Do Courbe\" alt=\"LEFREQUE-Do Courbe\" \/><\/a>\n\n\t\t\t<a class=\"image-lightbox\" href=\"https:\/\/latraversiere.fr\/en\/webzine\/en-pratique\/on-a-teste-lefreque\/attachment\/lefreque-la-graph\/\" data-cycle-caption=\"Mesure des harmoniques avec et sans LEFREQUE sur la note La\"><img src=\"https:\/\/latraversiere.fr\/wp-content\/uploads\/2017\/05\/LEFREQUE-La-Graph.png\" title=\"LEFREQUE-La Graph\" alt=\"LEFREQUE-La Graph\" \/><\/a>\n\n\t\t\t<a class=\"image-lightbox\" href=\"https:\/\/latraversiere.fr\/en\/webzine\/en-pratique\/on-a-teste-lefreque\/attachment\/lefreque-la-courbe\/\" data-cycle-caption=\"Mesure des harmoniques avec et sans LEFREQUE sur la note La\"><img src=\"https:\/\/latraversiere.fr\/wp-content\/uploads\/2017\/05\/LEFREQUE-La-Courbe.png\" title=\"LEFREQUE-La Courbe\" alt=\"LEFREQUE-La Courbe\" \/><\/a>\n\t<\/div>\n\t<div class=\"gss-info\">\n\t\t<div class=\"gss-nav\"><div id=\"graphiques_prev\" class=\"gss-prev\">&lt;<\/div><div id=\"graphiques_play\" class=\"gss-play\">&#9658;<\/div><div id=\"graphiques_next\" class=\"gss-next\">&gt;<\/div><\/div><div class=\"gss-long-cap\">Mesure des harmoniques avec et sans LEFREQUE sur la note Do<\/div><div id=\"graphiques_captions\" class=\"gss-captions\"><\/div>\n\t<\/div>\n<\/div>\n\n\n<p>M\u00eame si, avec Lefreque, les analyses spectrales montrent globalement une augmentation de l\u2019intensit\u00e9 de certaines harmoniques, notamment dans les hautes fr\u00e9quences, la modification harmonique n\u2019est pas si flagrante. En tout cas, il est difficile avec nos r\u00e9sultats de voir de mani\u00e8re significative une am\u00e9lioration du son li\u00e9 \u00e0 l\u2019att\u00e9nuation des partiels non harmoniques.<\/p>\n<h4><span style=\"color: #32a3c3;\">Conclusion<\/span><\/h4>\n<p>Effet psychologique, ou r\u00e9el am\u00e9lioration des vibrations\u00a0et donc du son? On en sait rien, mais nous qui \u00e9tions vraiment dubitatifs, on trouve qu\u2019il y a quelque chose\u2026 D\u2019ailleurs, certains grands interpr\u00e8tes ont d\u00e9j\u00e0 pass\u00e9 commande pour un ou plusieurs Lefreque. Ce petit accessoire va sans doute faire encore couler beaucoup d\u2019encre\u00a0!<br \/>\nEn ce qui nous concerne, on vous conseille de vous rendre chez Feeling Musique pour discuter avec les vendeurs (vraiment super sympas) qui vous feront essayer les diff\u00e9rents m\u00e9taux et tailles de Lefreque. Peut-\u00eatre serez vous convaincu de son efficacit\u00e9\u00a0?<br \/>\nN\u2019h\u00e9sitez pas \u00e0 laisser ci dessous vos retours d\u2019exp\u00e9rience et commentaire sur ce nouveau produit.<\/p>","protected":false},"excerpt":{"rendered":"<p>LEFREQUE, nom \u00e9tonnant donn\u00e9 \u00e0 deux petites plaques en m\u00e9tal incurv\u00e9es et pos\u00e9es l\u2019une sur l\u2019autre, qui promet \u00eatre une r\u00e9volution acoustique pour tout instrument \u00e0 vent. Alors, v\u00e9rit\u00e9 ou intox\u00a0? Nous avons voulu en savoir plus et avons r\u00e9alis\u00e9 nos propres tests.<\/p>\n","protected":false},"author":1,"featured_media":1962,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[48],"tags":[57,56,55,49,50],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v17.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>On a test\u00e9 LEFREQUE - LA TRAVERSI\u00c8RE<\/title>\n<meta name=\"description\" content=\"LEFREQUE, promet \u00eatre une r\u00e9volution acoustique pour tout instrument \u00e0 vent; v\u00e9rit\u00e9 ou intox, nous avons voulu en savoir plus et le tester pour vous.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/latraversiere.fr\/webzine\/en-pratique\/on-a-teste-lefreque\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"On a test\u00e9 LEFREQUE - La Traversi\u00e8re\" \/>\n<meta property=\"og:description\" content=\"LEFREQUE, promet \u00eatre une r\u00e9volution acoustique pour tout instrument \u00e0 vent; 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