Nws tsis muaj qhov zais cia tias dev muaj qhov hnov zoo heev. Feem ntau cov tswv tsev yuav pom tias lawv cov dev pob ntseg perk los yog twitch ntev ua ntej lawv hnov dab tsi lawv tus kheej. Txawm hais tias qee tus tsiaj muaj qhov hnov lus zoo dua li lwm tus,tag nrho cov dev tuaj yeem hnov suab ntawm qhov nruab nrab ntawm 80 ko taw, thiab qhov siab tshaj plaws ntawm ib mais deb
Cia li nyeem ntawv kom paub ntau ntxiv txog koj cov phooj ywg plaub-legged 'kev hnov lus zoo tshaj plaws, thiab kom nkag siab tias vim li cas pob ntseg canine thiaj li hnov zoo.
Dab Hnov Zoo Li Cas?
Ua ntej peb yuav nkag siab zoo npaum li cas tus dev hnov lus zoo, peb yuav tsum ua tib zoo saib seb lub suab yog dab tsi, thiab nws pom tau los ntawm tib neeg thiab tsiaj txhu. Qhov tseem ceeb, suab yog tsim los ntawm ob ntu: zaus thiab amplitude (los yog siv).
Frequency
Muab tso tseg, suab yog tsim los ntawm kev co uas mus los ntawm nruab nrab, xws li huab cua, dej, los yog ib txoj hlua li acoustic nthwv dej. Qhov ntau zaus nthwv dej, qhov siab dua lub suab-los yog zaus. Zaus yog ntsuas hauv Hz (Hertz) ib ob.
Feem ntau cov neeg hnov lus tuaj yeem ntes cov suab uas nyob nruab nrab ntawm 20 Hz thiab 20, 000 Hz, thaum cov dev tuaj yeem hnov suab txog 65, 000 Hz. Qhov no piav qhia yuav ua li cas cov dev tuaj yeem hnov cov "tseem ceeb" kev cob qhia xuav, thaum peb ua tsis tau. Cov dev tuaj yeem hnov suab ntawm cov zaus uas nyob ib puag ncig 3 zaug siab dua li cov neeg tuaj yeem hnov.
Sound Intensity
Ntxiv nrog rau qhov hnov ntau lub suab nrov dua li tib neeg tuaj yeem, dev tuaj yeem ntes cov suab nrov-lossis suab nrov dua peb. Lub suab siv tau ntsuas hauv decibels, nrog 0 dB yog lub suab nrov tshaj plaws rau tib neeg. Txhua yam hauv qab no yuav tsis hnov tib neeg pob ntseg.
Rau cov suab uas nyob nruab nrab ntawm 3,000 Hz thiab 12,000 Hz, dev tuaj yeem hnov suab nrov li -5 dB txog -15 dB ntawm qhov nruab nrab. Rau cov suab nrov nrov, dev pob ntseg ntau, ntau rhiab.
How Sound Changes Over Distance
Raws li lub suab txav deb ntawm nws qhov chaw, nws txo qis hauv kev siv. Txhawm rau kom meej meej, lub suab siv tau qis dua li ntawm 6 dB txhua zaus nws ob npaug ntawm qhov deb ntawm nws qhov chaw. Txij li cov dev tuaj yeem hnov suab nrov dua tib neeg, lawv tuaj yeem hnov txog qhov deb.
Yog tias koj xav paub tias dev tuaj yeem hnov zoo li cas, txhua yam yuav tsum ua nrog lub cev ntawm lawv lub pob ntseg. Cia peb saib kom ze!
Dab Tsi Tshwj Xeeb Txog Cov Pob Ntseg?
Dog muaj pob ntseg loj sab nraud hu ua pinnae. Lub pinna ua haujlwm raws li lub funnel, amplifying suab thaum nws mus rau hauv pob ntseg. Qhov loj thiab cov duab ntawm pinnae txawv nyob ntawm seb hom tsiaj. Piv txwv li, cov dev uas muaj pob ntseg loj thiab tsa ceg, xws li German Shepherds, yuav hnov zoo dua piv rau ib qho uas muaj pob ntseg pob ntseg, piv txwv li, Cocker Spaniels.
Ntxiv rau lawv cov pinnae, cov dev muaj ntau tshaj 18 leeg nyob rau hauv lawv lub pob ntseg, uas lawv siv los coj thiab tig lawv lub pob ntseg kom hnov suab uas yog los ntawm ntau cov lus qhia los yog thaws tawm ntawm qhov chaw.
Vim li cas dev thiaj hnov zoo?
Nws yog txhua yam ua rau muaj sia nyob thiab evolution. Raws li ib tug predatory pob tsiaj, ib tug aub lub hnov mob ceeb toom lawv rau prey thiab txaus ntshai ib yam nkaus. Txawm hais tias nws yog me ntsis thiab ntsiag to rustling ntawm ib tug tsiaj txav los ntawm cov hauv qab txhuam, los yog cov suab nrov thiab nyob deb ntawm lawv lub pob, cov dev qus cia siab rau lawv lub rooj sib hais.
Txawm hais tias peb cov phooj ywg nyob hauv tsev tsis tas yuav mus yos hav zoov lossis mloog kev phom sij, qhov kev zoo no tseem yog ib feem ntawm leej twg thiab lawv yog dab tsi, thiab lawv cuam tshuam li cas rau lub ntiaj teb nyob ib puag ncig lawv.
Haring Ability Comparison – Dogs vs. Tib Neeg thiab Lwm Tsiaj
Raws li qhov zoo kawg nkaus li lawv lub peev xwm hnov lus yog, muaj cov tsiaj nyob ntawd nrog kev hnov lus zoo dua li dev-thiab, ib yam li dev, txhua yam ua rau muaj sia nyob. Tus tsiaj uas muaj peev xwm hnov lus zoo tshaj plaws hauv ntiaj teb yog Greater Wax Moth, uas tej zaum yuav tau tsim qhov no kom dim nws cov tsiaj nyeg loj-bats.
| Nkauj Npauj Npaim: | 300,000 Hz |
| Human: | 20,000 Hz |
| Dog: | 45,000 Hz |
| Cat: | 64,000 Hz |
| Mouse: | 91,000 Hz |
| Ferret: | 44,000 Hz |
| Beluga Whale: | 123,000 Hz |
| Elephant: | 12,000 Hz |
Conclusion
Dog 'pob ntseg yog intricately tsim kom hnov suab ntawm lub siab frequencies thiab tsawg decibels. Qhov no yuav pab kom lawv ntes tau tsiaj txhu thiab ceeb toom rau lawv kom muaj kev phom sij. Peb cov phooj ywg furry tuaj yeem hnov cov suab uas nyob deb li plaub npaug tshaj li cov suab uas peb hnov. Yog li, lwm zaus koj pom lawv pob ntseg twitch lossis perk, paub tias tej zaum muaj qee yam tshwm sim uas koj tsis tuaj yeem hnov!
