🦈 Yileyo ndlela izilwane ezizwa ngayo

U-ushaka uzwa kanjani?

Negaprion brevirostris

Imisindo ephansi kuphela emthintayo: inhlanzi elimele ephithizela emamitheni angamakhulu.

Ngamafuphi

U-Ushaka uzwa cishe kusukela ku-10 Hz kuya ku-1 kHz, futhi ubamba kangcono eduze kuka-300 Hz. Nge-Animal Ears ungathatha noma yimuphi umsindo wakho bese uwuzwa ngendlela ayizwa ngayo.

Ushaka uhlala phansi ngqo emsindweni: kusukela ku-10 kuya ku-1 000 Hz, iphuzu lakhe elingcono kakhulu eduze kuka-300 Hz. Ayikho nhlobo imisindo ephakeme. Futhi empeleni “akayizwa” ingcindezi njengawe: uzwa ukunyakaza kwezinhlayiya zamanzi kuya phambili nemuva njengoba igagasi lidlula, into ephakathi kokuzwa nokuthinta. Lowo mkhakha omncane yiwona ngqo umsindo ongajwayelekile owenziwa yinhlanzi elimele lapho iphithizela, futhi angawulandela esekude. Dlulisa umsindo wakho endlebeni yakhe kusale ukuduma okufiphele: konke okunye, kuye, akukho.

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I-Hertz (Hz)

Yimiphi imisindo ayizwayo

I-hertz ibala ukuthi umsindo udlidliza kangaki ngomzuzwana. Ukudlidliza okuncane = ophansi (ukuduma kwezulu, cishe u-30 Hz). Ukudlidliza okuningi = ophakeme (ukukhala kwe-microwave, cishe u-3 000 Hz). Futhi u-“1 kHz” kuyindlela emfushane yokusho u-1 000 Hz. Wena uzwa, ngokujwayelekile, kusukela ku-20 Hz kuya ku-20 000 Hz.

🌩️ 🐘20 Hz

🗣️ 🎹3 kHz

🐭 🦇20+ kHz

Ushaka10 Hz – 1 kHz

Uzwa kacace kakhulu ku-300 Hz

Okuzwa wena20 Hz – 20 kHz

Umsindo ophansi uyaduma (cabanga ngokuduma kwezulu); umsindo ophakeme uyakhala kancane (cabanga ngomiyane). Lezi zinombolo ezintathu zikhombisa ukuthi lesi silwane sehla kangakanani, sikhuphuka kangakanani, futhi yiliphi izinga elizwa kacace kunazo zonke.

Izinombolo ezibalulekile: Ushaka
Umsindo ophansi kakhulu	10 Hz
Umsindo ophakeme kakhulu	1 kHz
Umsindo awuzwa kacace kunayo yonke	300 Hz
Okuzwa wena	20 Hz – 20 kHz

⇄

Izindlebe zakho vs. ezika-Ushaka

Yebo: ubamba ukuduma okuphansi kangangokuthi wena ungakuzwa esifubeni kuphela, kuze kube cishe 10 Hz. Phansi kwakho kungu-20 Hz. Ngakolunye uhlangothi uphuthelwa imisindo ephakeme oyizwayo wena: ngaphezu kuka-1 kHz, kuye akusekho lutho.

I-audiogram

I-Hertz (Hz)	Umkhawulo wokuzwa
10 Hz	95 dB
20 Hz	88 dB
40 Hz	82 dB
80 Hz	78 dB
100 Hz	76 dB
200 Hz	74 dB
300 Hz	73 dB
500 Hz	75 dB
600 Hz	79 dB
800 Hz	86 dB
1 kHz	95 dB

Low-frequency curve in dB re 1 µPa, but sharks have no swim bladder: they detect PARTICLE MOTION via otolithic organs. Pressure numbers are a tank-measured proxy; use for relative low-frequency EQ shape only.

👂

Ingabe u-Ushaka uzwa izinto ongenakuzizwa wena?

🦈 Ushaka

U-Ushaka ubamba konke kusukela ku-10 Hz (ophansi kakhulu) kuya ku-1 kHz (ophakeme kakhulu), futhi uzwa kacace kakhulu eduze kuka-300 Hz.

👤 Okuzwa wena

Imibuzo evamile

Yimiphi imisindo ezwiwa ngu-Ushaka?

U-Ushaka ubamba konke kusukela ku-10 Hz (ophansi kakhulu) kuya ku-1 kHz (ophakeme kakhulu), futhi uzwa kacace kakhulu eduze kuka-300 Hz.

Ingabe u-Ushaka uzwa izinto ongenakuzizwa wena?

I-Animal Ears yenza kanjani ukuthi umsindo uzwakale njengoba u-Ushaka ewuzwa?

Ososayensi balinganisile, izinga ngezinga, ukuthi umsindo kufanele ube mkhulu kangakanani ukuze u-Ushaka aqale ukuwuzwa. Sithatha lolo jikelele siluvise ekurekhodweni kwakho njenge-equalizer enkulu: sikhuphula amazinga isilwane esiwazwa kahle, sehlise noma sisuse lawo angekho nhlobo kuso. Umphumela usondela kulokho esikubamba... kodwa usazongena ngezindlebe zakho.

I-Hertz (Hz)

I-infrasound

Imisindo ephansi kangangokuthi indlebe yakho ayisayibhali: ngaphansi kuka-20 Hz. Esikhundleni sokuyizwa, ungezwa ukudlidliza esifubeni, njengalapho kudlula iloli elisindayo. Izindlovu namajuba kona ziyayibamba, ngisho namakhilomitha kude.

Zivelaphi lezi zinombolo

Nelson, D.R. (1967). Hearing thresholds… in the lemon shark. Bull. Marine Science, 17(3), 741–768.
Casper, B.M. & Mann, D.A. (2006). Evoked potential audiograms of the nurse shark and yellow stingray. Environ. Biol. Fishes, 76, 101–108. doi:10.1007/s10641-006-9012-9