Video: Yuav ua li cas koj xam tus nqi pib hloov?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
A pib ua haujlwm ntawm 20 dB muaj nyob ntawm 4000 Hz nruab nrab ntawm lub suab ntsuas thaum hnub nyoog 27 thiab 32. (The pib ua haujlwm yog xam los ntawm kev rho tawm lub rooj sib hais pib thaum muaj hnub nyoog 27 xyoo, uas yog 5, los ntawm lub rooj sib hais qhov pib thaum muaj hnub nyoog 32, uas yog 25). Ib daim ntawv kuaj dua tau lees paub qhov no ua haujlwm.
Nyob rau hauv no hais txog, dab tsi yog qhov kev hloov pauv tus qauv?
A Txheem Threshold Shift , lossis STS, tau hais tseg hauv kev ua haujlwm nrov nrov txheem ntawm 29 CFR 1910.95(g)(10)(i) raws li kev hloov hauv lub rooj sib hais pib , txheeb ze rau lub hauv paus ntsuas suab rau tus neeg ua haujlwm ntawd, ntawm qhov nruab nrab ntawm 10 decibels (dB) lossis ntau dua ntawm 2000, 3000, thiab 4000 hertz (Hz) hauv ib lossis ob lub pob ntseg.
Ib yam li ntawd, qhov hloov pauv mus tas li yog dab tsi? A kev hloov pauv mus tas li yog a hloov mus tas li nyob rau hauv lub auditory qhov pib . Tej zaum nws yuav tshwm sim tam sim ntawd los yog loj hlob zuj zus raws sij hawm. A hloov chaw pib mus tas li tau nyob rau hauv ruaj khov tsis hnov lus.
Qhov sib thooj, puas yog tus qauv pib hloov pauv tau?
OSHA suab nrov txheem txhais STS li qhov nruab nrab 10dB lossis ntau dua qhov poob hauv ib lossis ob lub pob ntseg txheeb ze rau qhov ntsuas tam sim no tshaj plaws hauv nruab nrab ntawm 2000, 3000 thiab 4000 Hz. Qhov no tsis yog OSHA kaw tau tsis hnov lus.
Audiograms ua haujlwm li cas?
Ib audiometry kev kuaj xyuas koj lub peev xwm hnov suab. Suab sib txawv, raws li lawv lub suab nrov (kev siv) thiab ceev ntawm lub suab nthwv dej vibrations (tone). Kev hnov lus tshwm sim thaum lub suab tsis ua rau lub paj hlwb ntawm pob ntseg sab hauv. Lub suab ntawd taug kev raws txoj hlab ntshav mus rau lub hlwb.
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