Lub tshuab Ultrasonic Vuam puas muaj hluav taws xob?
Ultrasound nws tus kheej tsis muaj hluav taws xob, nws muaj kev taw qhia zoo, muaj zog nkag mus rau lub zog, tuaj yeem tau txais cov suab nrov zog, thiab tuaj yeem mus deb hauv dej. Feem ntau siv lub tshuab vuam, koj yuav tsum hnav lub pob ntseg, txwv tsis pub ua haujlwm ntev yuav cuam tshuam rau koj lub rooj sib hais.
Rau kev lag luam ultrasonics, xws li ultrasonic vuam thiab ultrasonic tu, nws tseem yuav tsum tau muab cov ultrasonic zaus thiab suab siv. Nyob rau hauv ntau zaus, lub sij hawm raug thiab qhov sib txuas ntawm qhov nruab nrab yuav tsum tau txiav txim siab (piv txwv li, yog tias tib neeg thiab lub suab nrov muaj dej, lub suab ultrasonic siv yuav txaus ntshai). Hauv ib lo lus, ultrasound tsawg zaus (txog 20kHz) yuav tsum tau tiv thaiv los ntawm lub pob ntseg. Txawm hais tias nws yog theoretically harmless, nws suab annoying.
Tsis muaj cov ntaub ntawv qhia meej tias huab cua hauv huab cua tuaj yeem ua rau hnov lus puas, tab sis muaj qee qhov kev tsis xis nyob xws li mob taub hau thiab pob ntseg tsis xis nyob. Txawm li cas los xij, subharmonics tshwm sim los ntawm ultrasound tseem tuaj yeem ua rau hnov lus puas ntawm lub suab txaus.
Yog li ntawd, kev lag luam tam sim no muaj cov qauv qhia meej los txwv qhov kev siv ntawm ultrasound. Piv nrog rau high-frequency ultrasound, qhov kev siv ntawm tsawg zaus (txog 20kHz) ultrasound yog nruj dua, vim hais tias qee tus neeg tseem yuav hnov lub suab ntawm qhov zaus no. Cov qauv yooj yim tshaj plaws tam sim no tau hloov kho los ntawm Tsoomfwv Meskas Lub Tsev Haujlwm Saib Xyuas Kev Noj Qab Haus Huv Hauv Tebchaws thaum ntxov 2000s. Rau 20kHz ultrasound, qhov siab tshaj plaws tso suab siv yog 135dB, thiab nyob rau hauv cov ntaub ntawv ntawm 8 teev ntawm raug, tsuas 94dB ntawm lub suab siv tau tso cai. Rau high-frequency ultrasound, tus qauv no yuav tsim nyog so, thiab yog tias muaj kua sib txuas ntawm tib neeg thiab lub suab, nws yuav tsum raug txo los ntawm 30dB hauv tus qauv no.
