Iimbini zethu ezibalulekileyo ezibalulekileyo kukubona nokuva. Ngeendlebe zethu, siyakwazi ukubona utshintsho olusuka kwi-softest whisper ukubetha okuduma kakhulu.
Indlela esiyiva ngayo
Nangona kunjalo, ngaphezu kwekhono lokuva, yindlela esiva ngayo.
Izandi (eziza kugxuma emoyeni, amanzi, okanye enye indlela ehambelanayo) ifinyelela kwingxenyana yangaphandle yeendlebe zethu, eziyidlala ngendlebe yomlomo kwi-eardrum.
Yintoni ecacisa Ukuphakama kweZandi
Isandi esikhulu esikhulu sichazwe yimiba emininzi, equka ukudibanisa kwindleko yomoya efikelela endlebeni evela kumsunguli wesandi, kunye nomgama weendlebe zethu ukusuka kwinqanaba lokuvela kwesandi.
I-Decibel Scale
Ukutolika inkqubo yokufumana izandi, isixa, esaziwa njenge-decibel, senziwe.
Iindlebe zethu zibona utshintsho kwivolumu ngendlela engafaniyo. I-decibel iyinqanaba le-logarithmic lokulila. Uhlu lo-1 lwe-decibel lubonwa njengenguqu encinci kumthamo, i-decibel 3 yinguqu echanekileyo, kwaye i-decibel ezili-10 ibonwa ngumphulaphuli ngokuphindwe kabini kwevolumu. I-Decibels ikhethwe ngamagama: dB.
0 dB ngumyinge weentetho - Ezinye izibonelo ziquka:
- I-Whisper: 15-25 dB
- Ingxolo yengemuva: malunga ne-35 dB
- Ikhaya eliqhelekileyo okanye umgangatho weeofisi: 40-60 dB
- Izwi eliqhelekileyo lokuthetha: 65-70 dB
- Ingqungquthela ye-orchestral: 105 dB
- Umculo woMlambo oPhila: 120 dB +
- I-Thinhold ye-Pain: 130 dB
- Iinqwelo ze-Jet: 140-180 dB
Indlela i-Decibel Scale isetyenziswa ngayo
Isilinganiselo se-decibel sisetyenziselwa kwimo yendawo yaseshashalazini kule ndlela elandelayo:
Ukulungiselela ama-amplifiers, i-decibels ibonisa umlinganiselo wendlela elithatha ngayo amandla ukuvelisa isandi esithile siphumo lesandi. Nangona kunjalo, kukho into enomdla ukubonisa.
Ukuze omnye umlenzeli okanye ummkeli aphinde abe ngelizwi eliphindwe kabini njengelinye, ufuna iimveliso ezili-10 ngaphezulu. I-Receiver nge-100 WPC ikwazi ukuphindwe kabini kwinqanaba levolumu ye-10 WPC amp. Umamkeli kunye ne-100 WPC kufuneka abe yi-1,000 WPC ukuba ibe kabini ngelizwi elikhulu. Ukufumana iinkcukacha ezingakumbi malunga nokulinganiswa kwamandla okukhulisa amandla, funda eli nqaku: Ukuqonda ukuphuma kwamandla okuphuma kwamandla .
Kwisicelo esicacile ngakumbi, i-decibel isetyenziswe ngokunxulumene nokukwazi ukuveliswa kweefowuni kunye ne-subwoofers kwii-frequencies ezithile, kumanqanaba athile. Ngokomzekelo, isithethi sinokukwazi ukuvelisa udidi lwe-20 Hz ukuya ku-20kHz, kodwa kwii-frequencies ezingaphantsi kwe-80 Hz, inqanaba lesiphumo sokuvakala lingaba - 3dB phantsi ngokwemveliso yomsindo. Oku kungenxa yokuba kuninzi ukuveliswa kwamandla okufunekayo kumaziko aphantsi ukwenzela ukuvelisa inqanaba elifanayo levolumu.
Kwakhona, isilinganisi seDB sisetyenziswe kwisakhono sokuveliswa kwezinga lesandi kwisithethi esithile xa sondla ithoni eqhutywe ngenye yamanzi.
Umzekelo, isithethi esinokuvelisa i-90 dB okanye ngaphezulu kwesiphumo somsindo xa sisondeza isignali yomsindo we-watt sithathwa njengento enobubele .
Nangona kunjalo, ngenxa yokuba isithethi sinobubele obuhle asiyizigqibo ngokuzenzekelayo ukuba isithethi "esihle". Isithethi esidinga amandla amaninzi ukuvelisa isandi kubonisa kuphela inani legunya elifunekayo ukuze isithethi sivelise isandi esivakalayo. Ezinye izinto, kuquka ukuphendula kwempendulo, ukuphazamiseka, ukuphathwa kwamandla, kunye nokwakhiwa kwesithethi, kubalulekile.
Ukongezelela, iiprojekti zevidiyo, isilinganisi se-decibel sisetyenziselwa umlinganiselo ukuba isandi siphumezwa njani ngumqhubi wokupholisa. Ngokomzekelo, ukuba iprojekti yevidiyo ineqondo lokuvakala kwengxolo ye-20dB okanye ngaphantsi, oku kucatshulwa kakhulu. Ngaphandle kokuba uhleli kufuphi, akufanele ukwazi ukuva umqhubi - kwaye ukuba wenza, akufanele ukuphazamise.
Indlela yokulinganisa i-Decibels
Kalokunje ukuba unengcamango yokuba yiyiphi i-decibel kunye nendlela abachaphazela ngayo kumculo nakwii-home listening ear, umbuzo othi "Ungayilinganisela njani?".
Kubathengi, i-decibel yeendlela enye ingalinganiswa kukusebenzisa imitha yemitha ephathekayo (efana neyayiboniswe kwisithunzi esingasentla esibandakanywe kule nqaku.
Ekubeni abaninzi abafumana iimidlalo zentlalo bazakhele-kwiimvumi zetekisi zokuvavanya, ungasebenzisa ezo toni ukuchonga inqanaba le-decibel ekwenziwe kwisithethi ngasinye kwi-level setting level. Emva kokuba unqume izinga le-decibel eliveliswe kwisithethi ngasinye, unokwenza ulungelelanise amanqanaba omgangatho wesithethi ngabanye ukwenzela ukuba yonke inkqubo yesithethi ifane. Xa zonke izithethi zakho zibhalisa izinga elifanayo le-decibel kwinqanaba levolumu elinikeziweyo, i-awa lakho lokuphulaphula ngokuvakalayo liya kulungelelaniswa.
Imizekelo yeeMitha eziPhakathi ziquka:
Iingoma zeReed Iimitha zomsindo - Thenga kwi-Amazon
I-BAFX Imveliso Yomgangatho weMixal Sound - Thenga kwi-Amazon
I-Extech 407730 Iimitha zomsindo - Thenga kwi-Amazon
Iinkcukacha ezithe vetshe
Kumele kuboniswe ukuba i-decibel ingumlinganiselo owodwa wendlela uveliso olwenziwa ngayo kwaye luphinde lwaveliswa ngokuzonwabisa kwekhaya. Ukujonga ngokubanzi ulwazi lwezobugcisa kwi-decibel kunye nokuveliswa kwesandi kwindawo yendawo yaseshashalazini, khangela iqaku: I-Decibel (dB) Imilinganiselo ye-Scale & Audio Audio 101 (Audioholics).
Kwakhona, fumana ukuba i-decibel isetyenziswa njani ekulinganiseni amandla e-Wifi .