Video: UCL txhais li cas ntawm daim duab kab xev?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Qib tsis xis nyob ( UCL )
Kev xeem los txiav txim siab qib decibel uas koj pom tias kev hais lus tsis nrov nrov.
Hais txog qhov no, dab tsi yog qhov ntsuas qhov hnov lus zoo ib txwm?
40 dB suab ob zaug kom nrov li 30 dB thiab 8 zaug nrov li 10 dB (10 txog 20 txog 30 rau 40 = 2 x 2 x 2 = 8). Kev hnov lus zoo yog hom twg los ntawm 0 txog 20 dB hauv txhua zaus. Txij ntawm no mus, qhov kev xav yog tias koj muaj lub sensorineural hnov poob (uas koj muaj kev puas tsuaj rau lub pob ntseg sab hauv).
Ib yam nkaus, 40 dB hnov lus tsis zoo yog dab tsi? Cov neeg laus nrog me me tsis hnov lus (nruab nrab ntawm 26 thiab 40dB ua ) tej zaum yuav hnov lus zoo hauv ib-rau-ib qho kev sib tham, tab sis yuav nco cov lus thiab hais lus suab thaum hais lus ntsiag to lossis thaum muaj suab nrov yav tom ntej. Cov neeg laus nrog nruab nrab tsis hnov lus (nruab nrab ntawm 41 thiab 70 dB ) nco ntau lub suab hais lus thiab sib tham hauv xov tooj.
Kuj Paub, dab tsi yog qhov hnov ib txwm muaj?
Qhov feem ntau tau hais tseg ntawm tib neeg kev hnov lus yog 20 Hz ib rau 20 kHz. Nyob rau hauv qhov chaw kuaj mob zoo tshaj plaws, tib neeg tuaj yeem hnov lub suab qis li 12 Hz thiab siab txog 28 kHz, txawm hais tias qhov pib nce nrawm dua ntawm 15 kHz rau cov neeg laus, sib raug rau lub mloog pob ntseg kawg ntawm cochlea.
Qhov qhab nia ntawm kev hnov lus zoo yog dab tsi?
" Zoo meej " hnov muaj "0 dB" qhab nia ntawm txhua zaus. Txhua yam hauv qab 20 dB yog qhov phem tshaj li qub . Qhov poob 100 dB ntawm txhua qhov zaus txhais tau tias koj tsis hnov dab tsi.
Pom zoo:
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