Niaj hnub no, muaj ntau yam tshiab settlers, txhais chav tsev, yuam kom ua hauj lwm ntxiv, nrog rau cov rwb thaiv tsev ntawm lawv cov tsev vim hais tias txheem ntaub ntawv siv cia tsuas yog cov nkaum dab tsi yog yuav mus nyob rau nyob rau hauv koj tus kheej lub tsev, thiab tsis xav nyob rau hauv com tiv thaiv qhov yuav ntawm lawv cov neeg nyob ze.
Thaum cov kev ceev ntawm lub suab nyob rau hauv cov khib nyiab muaj feem xyuam rau tsawg kawg tus ceev thiab elasticity ntawm cov khoom, rau qia tom tsim. Yog li ntawd, nyob rau hauv cov khoom qhov chaw txheej nyob ib sab mus rau lub ceev phab ntsa, ua soundproof nrog "overlap" los ntawm saum toj no thiab hauv qab no. Nws tso cai rau koj los txo lub suab nrov theem nyob rau hauv decibels, tej zaum kuj ntau tshaj li 10 lub sij hawm. Ces nteg basalt mats, thiab nyob rau sab saum toj - gypsum boards, uas muaj kev cuam tshuam lub suab sab nraud los ntawm cov tsev apartment. Thaum ib lub suab yoj "yoov" mus xws li ib yig, nws yuav ploj mus rau hauv lub insulator khaubncaws sab nraud povtseg uas yog ntxeem tau thiab mos mos. Yog hais tias lub suab muaj ib tug loj dag zog yuam, cov ntaub ntawv nqus nws, txawm sov txog li kom.
Elastic tib yeeb tshuaj, xws li dej, ntoo, hlau, zoo kis suab tsis, li ntawd, peb hnov cov zoo "hu nkauj" ntawm cov suab paj nruas seev. Ib txhia neeg nyob rau hauv lub yav dhau los mus txiav txim qhov mus kom ze, piv txwv li, tus caij, muab nws lub pob ntseg mus rau hauv av, uas yog tseem txaus elastic.
Cov kev ceev ntawm lub suab nyob rau hauv km nyob ntawm tus yam ntxwv ntawm qhov chaw nyob rau hauv uas nws extends. Nyob rau hauv kev, cov txheej txheem yuav cuam tshuam nws siab, tshuaj muaj pes tsawg leeg, kub thiab txias, elasticity, ceev thiab lwm yam tsis. Piv txwv li, cov hlau ntawv kis suab tsis rau tus ceev ntawm 5100 meters ib ob, lub iav - txog 5000 m / s, thiab granite nyob rau hauv lub tsob ntoo - txog 4000 m / s. Yuav kom hloov ceev nyob rau hauv kilometers ib teev yuav tsum Coob nuj nqis rau 3600 (vib nas this tauj ib teev) thiab faib los ntawm 1000 (meters ib kilometer).
Cov kev ceev ntawm lub suab nyob rau hauv km nyob rau hauv ib tug aqueous nruab nrab yog txawv rau tshuaj nrog txawv salinities. Rau cov dej tshiab ntawm ib tug kub ntawm 10 degrees Celsius, nws yog hais txog 1450 m / s thiab nyob ib tug kub ntawm 20 degrees Celsius thiab tib siab - yog hais txog 1490 m / s.
Nyoj tib ib puag ncig yog kom meej meej dua ceev kis tau tus mob ntawm lub suab deeg.
Cov hais tawm ntawm lub suab nyob rau hauv cov huab cua yog tseem kub nyob. Yog hais tias tus nqi ntawm no parameter yog sib npaug zos rau 20 degrees Celsius, lub suab tsis dhau nrog ib tug tshaj tawm los ntawm hais txog 340 m / s, uas yog hais txog 1200 km / teev. Ib tug xoom degrees ntawm ceev slows rau 332 m / s. Rov qab mus rau peb insulators rau lub qhov, peb yuav pom tias nyob rau hauv xws li ib tug khoom, xws li cork, uas yog feem ntau siv los txo cov theem ntawm sab nraud suab nrov, lub suab tshaj tawm nyob rau hauv kilometers yog tsuas 1800 km / h (500 meters ib ob). Qhov no yog kaum lub sij hawm tsawg dua uas ntawm steel yam ntxwv nyob rau hauv kom meej.
Lub suab yoj yog ib tug longitudinal oscillation ntawm qhov chaw nyob rau hauv uas nws extends. Thaum dhau, piv txwv li, ib daim ntawm cov suab paj nruag suab los ntawm tej yam khuam siab, lub theem ntawm nws volume yog txo, vim hais tias hloov lub oscillation amplitude. Lub zaus tseem tib yam, yog li ntawd peb hnov tau tus poj niam lub suab raws li ib tug poj niam thiab ib tug txiv neej - raws li ib tug txiv neej. Cov feem nthuav yog qhov chaw uas lub suab ceev nyob rau hauv km yog nyob ze rau zero. Qhov no - lub tshuab nqus tsev nyob rau hauv uas no hom tsis muaj tsis yog propagated. Yuav kom qhia tau tias yuav ua li cas no xwb, physicists muab tso rau ib tug ringing lub tswb moos nyob rau hauv ib tug hood, los ntawm cov huab cua yog pumped. Qhov ntau lub rarity ntawm huab cua, lub quieter hnov tus hu.