Video: PTA txhais li cas ntawm daim duab suab?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Ntshiab-suab nruab nrab (PTA) yog qhov nruab nrab ntawm kev hnov lus nkag siab ntawm 500, 1000, thiab 2000. Qhov nruab nrab no yuav tsum kwv yees qhov kev txais tos kev hais lus (SRT), tsis pub dhau 5 dB, thiab qhov ntsuas pom kev hais lus (SDT), tsis pub dhau 6-8 dB.
Hauv qhov no, PTA yog dab tsi ntawm audiogram?
Qhov Ntshiab Tone Nruab Nrab ( PTA ) hais txog qhov nruab nrab ntawm cov qib kev hnov lus ntawm cov txheej txheem tshwj xeeb: feem ntau 500, 1000, 2000 thiab 4000 Hz. Tus nqi no muab cov ntsiab lus ntawm tus neeg qhov kev hnov lus hauv txhua pob ntseg.
Ib qho ntxiv, lub suab twg yog ntawm 8000 Hz? Suab lossis Zaus Qhov ntsuas zaus tau ntsuas yog 125 Hz , 250 Hz , 500 Hz , 1000 Hz , 2000 Hz , 3000 Hz, 4000 Hz , thiab 8000 hli . Piv txwv ntawm "tsawg zaus" suab yog suab nrov nrov ntawm xob quaj, tuba, thiab suab zoo li "oo" hauv "leej twg." Piv txwv ntawm "high-frequency" suab yog noog quaj, xuav, thiab "s" suab hauv "sun."
Hais txog qhov no, kev hnov lus tus lej txhais li cas?
Decibels yog chav tsev uas ntsuas lub suab. Ntawm koj lub suab kaw suab, decibel poob raug ntsuas ntsug ntawm sab laug. Raws li tus lej tau loj dua, yog li ua koj hnov poob. Piv txwv: Nyeem cov ntawv sau suab saum toj no los ntawm sab laug mus rau sab xis, zaum kawg O (pob ntseg sab xis) tsoo txog 68 db lossis ntau dua.
4 qib lag ntseg yog dab tsi?
Cov plaub txawv theem ntawm kev hnov lus tsis zoo tau txhais raws li: Me ntsis, Nruab Nrab, Loj thiab Txaus.
Pom zoo:
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