Mhlawumbi uye waphawula ukuba kukho ininzi yentloko ye-headphones kwi-market . Ngelishwa ukuba umthengi, nangona kunjalo, ukuphumelela kwesiphaluka-ukukhansela isiphaluka kuyahluka ngokubanzi kwi-headphone ukuya kwisikhwama. Eminye yabo iphumelela kakhulu unokucinga ukuba into ephosakeleyo ngeendlebe zakho. Kodwa ezinye zazo zikhansela kuphela i-decibel eyingxolo. Okubi nakakhulu, ezinye zazo zongeza i-audible yakhe, ngoko ngelixa zinciphisa ingxolo kwii-frequencies eziphantsi, ziyakhula kwiindawo eziphezulu.
Ngethamsanqa, ukulinganisa isandi-ukukhansela umsebenzi kwi-casphone kuyinto elula. Inkqubo ibandakanya ukuvelisa isandi sepinki ngokusebenzisa isethi yezithethi, ngoko ulinganisa ukuba isandi siphumelela njani kwi-headphones kwiindlebe zakho.
01 ngo 04
Inyathelo 1: Ukubeka i-Gear
Inxalenye yesilinganiselo ifuna isofthiwe esisisiseko sokuhlaziya i-spectrum, njenge-True RTA; I-USB microphone interface, efana ne-Blue Microphones Icicle; kunye nendlebe / itekisi isimulator njenge-GRAS 43AG endiyisebenzisayo, okanye i-maniphone yesilinganiselo somlinganiselo njenge-GRAS KEMAR.
Ungabona ukusekwa okuyisiseko kwisithombe esingentla. Yiyo 43AG ngasezantsi ngakwesobunxele, ifakwe ngophawu lwe-rubber emele i-earlobe efana nabantu abadala, oko kukuthi, amadoda aseMerika naseYurophu. Ama-earpieces atholakala kwiindidi ezahlukeneyo kunye nee-durometers ezahlukeneyo.
02 we 04
Inyathelo 2: Ukwenza ezinye izandi
Ukuvelisa iimpawu zokuvavanya ngokwenene kunzima xa uhamba yincwadi. Umgangatho we-IEC 60268-7 umlinganiselo wesithloko ubeka ukuba umthombo ozwakalayo lo vavanyo kufuneka ube ziithethi ezisibhozo ezibekwe kwiikona zegumbi, ngasinye sidlala umthombo womsindo ongahambelaniyo. Ukungahambelananga kuthetha ukuba isithethi ngasinye sinomqondiso wesandi esingenangqondo, ngoko ke akukho nanye impawu ezifanayo.
Kulo mzekelo, ukusetha kwabandakanya izithethi ezimbini ezine-Genelec HT205 kumacandelo ahlukeneyo eofisini / ibhabhu, elowo liqhubela ekhoneni ukuze lisasaze ngakumbi isandi sayo. Ezi zimbini zithethi zithola iimpawu zengxolo ezingenanto. I-Sunfire TS-SJ8 i-subwoofer kwikona enye yongeza ezinye iziseko.
Uyakubona ukuseta kumzobo ongentla. Izikwere ezincinci ezithintela kumacangca yi-Genelecs, ixande elikhulu elingaphantsi kwesigxina se-Sunfire, kwaye ixande elimnyama liyi-bench yokuhlola apho ndiyenza khona.
03 we 04
Inyathelo lesi-3: Ukuqhuba iMilinganiselo
Ukuqala ukulinganisa, fumana ukudlala kwengxolo, uze usethe izinga lezandi ukwenzela ukuba lilinganise i-75 dB kufuphi nomnyango we-earphone ye-rubber ye-43AG, ekulinganiselwe usebenzisa umgangatho we-sound-level sound (SPL). Ukufumana isiseko santoni esingaphandle kwendlebe yenkohliso ukuze ukwazi ukuyisebenzisa njengendlela yokubhekisela, cofa iqhosha le REF kwi-TrueRTA. Oku kukunika umgca wecala kwigrafu ngqo kwi-75 dB. (Uyakubona oku kumfanekiso olandelayo.)
Emva koko, faka iphonephone kwindlebe / itekisi simulator. Umgangatho wam ebhentshini wam vavanyo uhlanganiswe ngamabloko eenkuni ukwenzela ukuba umgama ukusuka kwiplani ephezulu ye-43AG ukuya ngasezantsi kweebhloko zokhuni kuyafana nokulinganisa kwentloko yam ezindlebeni zam. (Andikwazi ukukhumbula kanye into endiyiyo, kodwa i-intshi ezingama-7.) Oku kugcina ingcinezelo efanelekileyo yesikrini sekhanda ngokumelene nendlebe / itekisi simulator.
Ngama-IEC 60268-7, ndibeka i-TrueRTA ye-1/3-octave elula kunye nokuyibeka kwisilinganiso seesampuli ezili-12. Nangona kunjalo, njengawo nawuphi na umlinganiselo obandakanya ingxolo, akunakwenzeka ukuba ufumane i-100% echanekileyo ngenxa yokuba ingxolo iyakhawuleza.
04 we 04
Inyathelo 4: Ukuqinisekisa iSiphumo
Le tshathi ibonisa umphumo wesilinganiselo sephonephone ye-Phiaton Chord MC 530. Umgca we-cyan ungumgca-siseko, yintoni umlomo / isithende simulator "uva" xa kungekho mkhwaphulo apho. Umgca oluhlaza ngumphumo ngenxa yokukhishwa kwengxolo. Umgca obomvu ungumphumo wokukhutshwa komsindo-ukukhansela.
Qaphela ukuba isiphaluka sokucima isandi sinomphumo onamandla kakhulu phakathi kwe-70 ne-500 Hz. Oku kuqhelekileyo, kwaye yinto entle kuba yiyo ibhanzana apho ingxolo yenjini ye-droning ngaphakathi kwekhenkethi ye-airliner ihlala khona. Qaphela kwakhona ukuba isiphaluli sokurhoxisa isandi sinokwandisa izinga lezandi kumazinga aphakamileyo, njengoko sibona kule tstshi apho ingxolo iphezulu phakathi kwe-1 ne-2.5 kHz kunye nokukhutshwa komsindo.
Kodwa uvavanyo alugqityiwe kude luqinisekiswe ngendlebe. Ukwenza oku, ndisebenzisa isimiso sam stereo ukuba ndidlale ukurekhoda endiyenziwe ngomsindo ngaphakathi kwekhenkethi yezindiza. Ndenza ukurekhoda kwam enye yeendawo zokuhlala ze-MD-80 jet, enye yeyona ndlela indala kunye neyesandi kunazo zonke okwangoku enkonzweni yezorhwebo e-US Emva koko ndibona-okanye ndive-indlela enhle ngayo umsebenzi umkhono wesihenqo onokuyenza ukunciphisa nje ingxolo yejet, kodwa isandi saziso kunye nabanye abagibeli.
Ndenza le milinganiselo iminyaka emininzi ngoku, kunye nokulungelelanisa phakathi kokulinganisa kunye nokukhwabanisa kwenzalo endiye ndazifumana kwiiplani kunye neebhasi zihle kakhulu ngeentloko ze-ear ear and ear-ear. Imilinganiselo ayilungile kakuhle kwi-earphones ye-ear-ear, kuba kunye nalawo ndiqhele ukuba ndisuse iplani yesitramu kwi simulator kwaye sebenzisa ikhamera ye-GRAS RA0045 yokulinganisa. Ngaloo ndlela, enye yempembelelo yokugcina (ukukhutshwa) kwimizekelo emikhulu ye-ear-ear is lost. Kodwa isalathisi esihle kakhulu sokuba isiphaluka sokucima isandi ngokwawo sisasebenza.
Qaphela ukuba njengemilinganiselo yonke yomsindo, lo awuphelelanga. Nangona i- subwoofer ibekwa kude kakhulu kunokwenzeka ukusuka kwibhentshini yokuvavanya, ibhenki yokuhlola ifakwe kwiinyawo eziziwayo, kunye ne-ear / cheek simulator inezinyawo zerabhagi ezihambelanayo, ubuncinane ubuncinane bezinye izitshixo zebrabhu zixhamla ngqo kwi-microphone ngokuqhuba umzimba. Ndizame ukuphucula oku ngokufaka i-padding ngaphezulu ngaphantsi kwe simulator, kodwa akukho nto iyenzayo, mhlawumbi ngenxa yokuba izibilini zomoya zinikezela isandi kumzimba we simulator.