{"id":62541,"date":"2023-04-21T12:20:25","date_gmt":"2023-04-21T17:20:25","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/can-speakers-produce-ultrasound\/"},"modified":"2025-01-27T06:02:05","modified_gmt":"2025-01-27T11:02:05","slug":"can-speakers-produce-ultrasound","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/cs\/can-speakers-produce-ultrasound\/","title":{"rendered":"M\u016f\u017ee reproduktor generovat ultrazvuk?"},"content":{"rendered":"

Reprodukce ultrazvuku reproduktory: Mo\u017enosti a limity<\/p>\n

Reproduktory, za\u0159\u00edzen\u00ed b\u011b\u017en\u011b pou\u017e\u00edvan\u00e1 k reprodukci zvuku sly\u0161iteln\u00e9ho lidsk\u00fdm uchem, maj\u00ed sv\u00e9 fyzik\u00e1ln\u00ed limity. Ot\u00e1zka, zda mohou reproduktory produkovat ultrazvuk, je komplexn\u00ed a z\u00e1vis\u00ed na n\u011bkolika faktorech, v\u010detn\u011b konstrukce reproduktoru, pou\u017eit\u00e9ho materi\u00e1lu membr\u00e1ny a zesilova\u010de. Zat\u00edmco b\u011b\u017en\u00e9 reproduktory se zam\u011b\u0159uj\u00ed na frekven\u010dn\u00ed rozsah sly\u0161iteln\u00fd pro \u010dlov\u011bka (p\u0159ibli\u017en\u011b 20 Hz a\u017e 20 kHz), existuj\u00ed specializovan\u00e9 technologie a konstrukce, kter\u00e9 umo\u017e\u0148uj\u00ed generov\u00e1n\u00ed ultrazvukov\u00fdch frekvenc\u00ed.<\/p>\n

Fyzik\u00e1ln\u00ed principy omezuj\u00edc\u00ed reprodukci ultrazvuku<\/h3>\n

Hlavn\u00edm faktorem omezuj\u00edc\u00edm reprodukci ultrazvuku b\u011b\u017en\u00fdmi reproduktory je hmotnost a tuhost membr\u00e1ny. Aby reproduktor efektivn\u011b generoval zvuk na vysok\u00fdch frekvenc\u00edch, mus\u00ed membr\u00e1na vibrovat s velmi vysokou frekvenc\u00ed. P\u0159i ultrazvukov\u00fdch frekvenc\u00edch (nad 20 kHz) se tato vysok\u00e1 frekvence st\u00e1v\u00e1 mechanicky n\u00e1ro\u010dnou, a to z d\u016fvodu setrva\u010dnosti membr\u00e1ny. \u010c\u00edm v\u011bt\u0161\u00ed je hmotnost membr\u00e1ny, t\u00edm obt\u00ed\u017en\u011bj\u0161\u00ed je ji rozvibrovat na vysok\u00fdch frekvenc\u00edch. Podobn\u011b i vysok\u00e1 tuhost membr\u00e1ny br\u00e1n\u00ed jej\u00edmu efektivn\u00edmu pohybu p\u0159i vysok\u00fdch frekvenc\u00edch.<\/p>\n

Materi\u00e1ly a konstrukce reproduktor\u016f pro ultrazvuk<\/h3>\n

Pro generov\u00e1n\u00ed ultrazvuku je nutn\u00e9 pou\u017e\u00edt lehk\u00e9 a z\u00e1rove\u0148 tuh\u00e9 materi\u00e1ly pro membr\u00e1nu. N\u011bkter\u00e9 materi\u00e1ly, jako nap\u0159\u00edklad piezoelektrick\u00e9 keramick\u00e9 materi\u00e1ly, jsou pro tuto aplikaci ide\u00e1ln\u00ed, proto\u017ee se deformuj\u00ed p\u0159i aplikaci elektrick\u00e9ho pole, a t\u00edm generuj\u00ed mechanick\u00e9 vibrace. Konstrukce reproduktoru tak\u00e9 hraje kl\u00ed\u010dovou roli. Mal\u00e1 velikost a n\u00edzk\u00e1 hmotnost membr\u00e1ny jsou z\u00e1sadn\u00ed pro dosa\u017een\u00ed vysok\u00fdch frekvenc\u00ed. D\u00e1le je d\u016fle\u017eit\u00e1 precizn\u00ed konstrukce cel\u00e9ho syst\u00e9mu, v\u010detn\u011b magnetick\u00e9ho obvodu a c\u00edvky, kter\u00e1 \u0159\u00edd\u00ed pohyb membr\u00e1ny.<\/p>\n

Srovn\u00e1n\u00ed b\u011b\u017en\u00fdch a specializovan\u00fdch reproduktor\u016f<\/h3>\n\n\n\n\n\n\n
Typ reproduktoru<\/th>\nFrekven\u010dn\u00ed rozsah<\/th>\nMateri\u00e1l membr\u00e1ny<\/th>\nAplikace<\/th>\n<\/tr>\n<\/thead>\n
B\u011b\u017en\u00fd reproduktor<\/td>\n20 Hz – 20 kHz<\/td>\nPap\u00edr, textil, polymery<\/td>\nReprodukce zvuku<\/td>\n<\/tr>\n
Specializovan\u00fd ultrazvukov\u00fd reproduktor<\/td>\n>20 kHz<\/td>\nPiezoelektrick\u00e9 keramiky<\/td>\nL\u00e9ka\u0159sk\u00e9 zobrazov\u00e1n\u00ed, pr\u016fmyslov\u00e9 \u010di\u0161t\u011bn\u00ed<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Aplikace ultrazvukov\u00fdch reproduktor\u016f<\/h3>\n

Ultrazvukov\u00e9 reproduktory nach\u00e1zej\u00ed uplatn\u011bn\u00ed v \u0161irok\u00e9m spektru oblast\u00ed. V medic\u00edn\u011b se pou\u017e\u00edvaj\u00ed pro diagnostick\u00e9 zobrazov\u00e1n\u00ed (ultrazvukov\u00e9 vy\u0161et\u0159en\u00ed), v pr\u016fmyslu pro \u010di\u0161t\u011bn\u00ed, sva\u0159ov\u00e1n\u00ed a m\u011b\u0159en\u00ed. V n\u011bkter\u00fdch p\u0159\u00edpadech se vyu\u017e\u00edvaj\u00ed i pro sonick\u00e9 odpuzova\u010de hmyzu nebo zv\u00ed\u0159at.<\/p>\n

Z\u00e1v\u011br<\/h3>\n

Zat\u00edmco b\u011b\u017en\u00e9 reproduktory nedok\u00e1\u017eou efektivn\u011b generovat ultrazvuk, specializovan\u00e9 reproduktory s pou\u017eit\u00edm vhodn\u00fdch materi\u00e1l\u016f a konstrukce tuto schopnost maj\u00ed. V\u00fdvoj v oblasti materi\u00e1l\u016f a technologi\u00ed umo\u017e\u0148uje st\u00e1le vy\u0161\u0161\u00ed frekvence a efektivn\u011bj\u0161\u00ed generov\u00e1n\u00ed ultrazvuku. Technologie piezoelektrick\u00fdch reproduktor\u016f hraje v t\u00e9to oblasti kl\u00ed\u010dovou \u00falohu, a to v mnoha oblastech od medic\u00edny a\u017e po pr\u016fmyslov\u00e9 aplikace.<\/p>\n","protected":false},"excerpt":{"rendered":"

Reprodukce ultrazvuku reproduktory: Mo\u017enosti a limity Reproduktory, za\u0159\u00edzen\u00ed b\u011b\u017en\u011b pou\u017e\u00edvan\u00e1 k reprodukci zvuku sly\u0161iteln\u00e9ho lidsk\u00fdm uchem, maj\u00ed sv\u00e9 fyzik\u00e1ln\u00ed limity. Ot\u00e1zka, zda mohou reproduktory produkovat ultrazvuk, je komplexn\u00ed a z\u00e1vis\u00ed na n\u011bkolika faktorech, v\u010detn\u011b konstrukce reproduktoru, pou\u017eit\u00e9ho materi\u00e1lu membr\u00e1ny a zesilova\u010de. Zat\u00edmco b\u011b\u017en\u00e9 reproduktory se zam\u011b\u0159uj\u00ed na frekven\u010dn\u00ed rozsah sly\u0161iteln\u00fd pro \u010dlov\u011bka (p\u0159ibli\u017en\u011b 20 Hz<\/p>\n","protected":false},"author":1,"featured_media":18685,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6415],"tags":[],"class_list":["post-62541","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","prodpage-classic"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/posts\/62541","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/comments?post=62541"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/posts\/62541\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media\/18685"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media?parent=62541"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/categories?post=62541"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/tags?post=62541"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}