Isikhulumi se-PA vs Isikhulumi se-Horn: Umehluko Obalulekile
Embonini yomsindo wezohwebo kanye nezaziso eziningi, amagama aphathelene nama-transducer e-acoustic avame ukuba umthombo wokudideka. Igama elithi “isikhulumi se-PA” (Isikhulumi Senkulumo Yomphakathi) ivame ukusetshenziswa njengegama eliphelele lanoma yisiphi isikhulumi esixhunywe ohlelweni lomsindo olusatshalaliswe. Ngenkathi imboni yomsindo yochwepheshe ebanzi ivame ukusebenzisa “isipikha se-PA” ukuchaza noma yisiphi isivikelo sokuqinisa umsindo—kufaka phakathi ama-rig ekhonsathi agcwele uphondo—kumsindo osatshalaliswe kwezentengiselwano, ngokuvamile ibhekisela kusipikha esikhipha uphondo esiqondile. Ukuqonda umehluko phakathi kwesipikha se-PA esikhipha uphondo esiqondile kanye nesipikha esikhipha uphondo kubalulekile kubahlanganisi be-AV, izazi ze-acoustic, kanye nabaphathi bezikhungo abanomsebenzi wokuklama izinhlelo ezihlangabezana nokuzwakala okuthile (ngokuvamile okuqondiswe ku-Speech Transmission Index engu->0.50), ukumbozwa, kanye nezidingo zemvelo.
Umehluko omkhulu phakathi kwalezi zobuchwepheshe ezimbili usendleleni yazo yokudlulisa umsindo nge-electro-acoustic kanye nokuxhumanisa i-acoustic emoyeni ozungezile. Isikhulumi se-PA esijwayelekile ngokuvamile sisebenzisa umshayeli wekhoyili ohambayo ofakwe ngaphakathi kwendawo evalekile noma evalekile. Lo mklamo ukhipha umsindo ngqo endaweni ezungezile, ubeka phambili impendulo yemvamisa ebanzi (ngokuvamile kusuka ku-60 Hz kuya ku-20,000 Hz) kanye nebhalansi yemvelo yethoni. Ngokuphambene nalokho, isikhulumi se-horn sisebenzisa umshayeli wokucindezela okhethekile ohlanganiswe ne-flared acoustic waveguide (uphondo). Lokhu kulungiselelwa kusebenza njenge-transformer ye-acoustic, efanisa i-impedance ephezulu yomshini we-diaphragm yomshayeli ne-impedance ephansi ye-acoustic yomoya ozungezile. Lokhu kukhulisa ukusebenza kahle kwe-electro-acoustic, yize ngokuvamile kubiza ukukhiqizwa kwemvamisa ephansi (ngokuvamile kugoba ngaphansi kuka-300 Hz).
Kubaklami bezinhlelo, ukukhetha phakathi kwesipikha se-PA nesipikha se-horn kubalwa ngokusekelwe emikhawulweni ebonakalayo yesikhala sokufakwa. Isinqumo sincike ku-Sound Pressure Level edingekayo (SPL), umsindo ozungezile, ibanga lokuphonsa elidingekayo, kanye nokuqukethwe okuyinhloko okusakazwayo—kungakhathaliseki ukuthi umculo wangemuva ophelele, ukuqoshwa kwezwi okubucayi, noma amathoni okuphuma okuphuthumayo.
Inhloso eyinhloko kanye nokumbozwa komsindo
Inhloso eyinhloko yesipikha sendabuko se-PA ukuletha umsindo osezingeni eliphezulu kuwo wonke amaza amaningi. Lokhu kusenza sikwazi ukuphinda sikhiqize kokubili izici zomculo oqoshiwe kanye nomsindo wemvelo wezwi lomuntu. Ngenxa yokuthi izipikha ezijwayelekile ze-PA zithembele kumakhoni akhipha imisebe ngqo, ukumbozwa komsindo wazo kuvame ukuba banzi futhi kube yi-conical, ngokuvamile kusakaze umsindo ngama-engeli aphakathi kuka-90° no-120°. Lokhu kusabalala okubanzi kusebenza kahle kakhulu ekumbozeni indawo ngomsindo ofanayo, uma nje ukuphakama kophahla (okungcono kakhulu ngamafidi angu-8 kuya kwangu-14) kanye nokubonakaliswa kwe-acoustic kulawulwa ngendlela efanele.
Izipikha ze-Horn, ngokuphambene nalokho, zenzelwe ukuzwakala kahle nokungena okuphezulu. Umsebenzi wazo oyinhloko ukuletha umsindo oqondakala kahle, onebhendi encane ebangeni elide noma ezindaweni ezinomsindo omkhulu we-ambient. Ukuqhuma kwe-horn kunquma iphethini yokusabalala, evame ukuba mncane kakhulu futhi ilawulwa kakhulu—ngokuvamile ikhawulelwe ku-60° ngo-40° noma iqine kakhulu, okunikeza i-Directivity (Q) factor ephezulu ka-10 kuya ku-15. Lokhu kuqondisa okugxilile kugxila amandla e-acoustic abe yi-beam ethile, kunciphisa ukuchitheka kwe-acoustic ezindaweni ezingafuneki futhi kunciphisa ukucasuka kwamasimu aphindaphindayo ezindaweni ezibonisa kakhulu.
Izicelo ezijwayelekile zekheli lomphakathi kanye ne-paging
Ekusetshenzisweni okusebenzayo, izikhulumi ze-PA ezijwayelekile ngokuvamile ziyisinqumo esizenzakalelayo sezindawo lapho ikhwalithi yomsindo, ukuhlanganiswa kobuhle, kanye nokumbozwa okufanayo komsindo wevolumu ephansi kuya kwephakathi (ngokuvamile okungu-70 kuya ku-85 dB) kuyimigomo eyinhloko. Izihlanganisi zisebenzisa izikhulumi ze-PA ezifakwe ngaphezulu, ezilengayo, kanye nezimbozwe uphahla kakhulu ezitolo zokuthengisa, emagumbini ebhodi ezinkampani, ezindaweni zokungenisa izihambi, nasezikhungweni zemfundo. Kulezi zilungiselelo, uhlelo kumele lushintshe kalula phakathi kokuhlinzeka ngomculo wangemuva ongabonakali (i-BGM) kanye nokubhala kwezwi okucacile, okuzwakala ngokwemvelo.
Izipikha ze-Horn zivame ukucaciswa ngezinhlelo zokusebenza zezimboni, zangaphandle, kanye nezokuphepha empilweni lapho ukukhishwa kwe-acoustic okuluhlaza kanye nokusinda kuthatha indawo yokwethembeka komculo. Zijwayelekile emagcekeni ezitimela, phansi kokukhiqiza, ezinkundleni zemidlalo, kanye nezinhlelo zesexwayiso eziphuthumayo zikamasipala. Efektri yokukhiqiza enomsindo ophansi ophakathi kuka-85 kuya ku-90 dB(A), isikhulumi se-PA esijwayelekile ngokuvamile singaminza noma siqhutshwe sihluleke sizama ukunqoba umsindo. Nokho, isikhulumi se-horn singakhiqiza kalula ukukhishwa okuphezulu okungu-105 kuya ku-115 dB(A) okudingekayo ukuze kufezwe isilinganiso esidingekayo sesignali-kuya-kumsindo esingu-+10 dB kuya ku-+15 dB ukuze kuqondwe kahle.ukufometha okuphuthumayo. Kubalulekile ukuqaphela ukuthi lokhu kuhlukana kwangaphakathi/ngaphandle akulona iqiniso; izikhulumi ze-PA ezikhipha imisebe eqondile ezingamelani nesimo sezulu zivame ukusetshenziswa ngaphandle ukuze zithole umsindo osezingeni eliphezulu, kuyilapho izikhulumi ze-horn zivame ukufakwa ngaphakathi ezindaweni ezinomsindo, ezinamasango njengezindawo zokuphumula noma izindawo zokugcina impahla.
Uyini Isikhulumi se-PA
Isikhulumi se-PA, ngokomongo womsindo osatshalaliswa kwezentengiselwano, sibhekisela kusipikha esikhipha imisebe eqondile esenzelwe ukukhiqiza izinhlobo eziningi zamaza omsindo ukuze kusakazwe ngenhloso evamile. Izipikha ze-PA zezentengiselwano ezifakiwe zivame ukwakheka ukuze zisebenze ngokuqhubekayo ngaphakathi kwamanethiwekhi okusabalalisa ama-voltage angaguquki angu-70V noma angu-100V. Lokhu kuvumela amashumi noma amakhulu ezipikha ukuthi ziboshwe ngezintambo ezinde endaweni enkulu kusetshenziswa intambo encane kakhulu (ngokuvamile engu-16 kuya ku-18 AWG), zinqobe ukulahleka okukhulu kwesiginali okungenzeka ngezintambo ezijwayelekile eziphansi (8-ohm) phezu kokugijima kwekhebula okungaphezu kwamamitha ayi-100 kuya kwangu-200.
Ukwakhiwa okungokoqobo kwesipikha se-PA sezentengiselwano kuvame ukuhilela indawo evalekile eqinile eyenziwe ngepulasitiki ye-ABS ebunjiwe nge-injection, i-medium-density fiberboard (MDF), noma insimbi. Ngaphakathi kwendawo evalekile, i-transducer eyodwa noma ngaphezulu ye-moving-coil ifakwe ku-baffle yangaphambili. Indawo evalekile ivimbela amaza omsindo angaphandle kwesigaba akhiqizwa yi-backer ye-speaker ukuthi azungeze futhi akhansele amaza omsindo akhiqizwa yi-front, okubalulekile ekukhiqizeni amaza aphansi naphansi aphakathi nendawo.
Ukuze kuhlanganiswe namanethiwekhi omsindo asakazwe, izikhulumi ze-PA zezentengiselwano zihlonyiswe ngama-transformer ahlanganisiwe afana ne-step-down line. Lawa ma-transformer afaka ama-tap amaningi ayinhloko (isb., 1.5W, 3W, 6W, 15W, 30W), okuvumela i-integrator yesistimu ukuthi ilungise amandla e-wattage adonswa yisikhulumi ngasinye. Leli khono libalulekile ekulinganiseni amazinga e-SPL kuzo zonke izindawo ezahlukene zesakhiwo.
Indlela izikhulumi ze-PA ezikhiqiza ngayo inkulumo nomculo
Ukuze kufezwe impendulo ebanzi neyisicaba yemvamisa, izikhulumi ze-PA zezentengiselwano zivame ukusebenzisa umklamo we-acoustic onezindlela ezimbili. Lokhu kulungiselelwa kuhlukanisa isignali yomsindo ibe amabhendi amabili ahlukene emvamisa kusetshenziswa inethiwekhi yangaphakathi ye-passive crossover (ngokuvamile ewela phakathi kuka-2.5 kHz no-3.5 kHz). Amaza aphansi naphakathi nendawo adluliselwa kwikhoni enkulu ye-woofer (ngokuvamile amasentimitha angu-4 kuya kwangu-8 ububanzi), kuyilapho amaza aphezulu eqondiswa kwi-tweeter encane (ngokuvamile i-intshi engu-0.75 kuya ku-1).
Ngokuhlukanisa umsebenzi phakathi kwama-transducer alungiselelwe amazinga awo emvamisa, izikhulumi ze-PA ezinezindlela ezimbili zingaphinda zikhiqize amanothi e-bass ajulile adingekayo kumculo wangaphambili kanye nemisindo eqondile yongwaqa edingekayo ukuze izwi lizwakale kahle. Inethiwekhi ye-crossover iqinisekisa ukuguquka okubushelelezi phakathi kwabashayeli, igcina umsindo wezwi wemvelo ovimbela ukukhathala kwabalaleli ngesikhathi sokudlala isikhathi eside.
Ukusetshenziswa kwangaphakathi nakwezebhizinisi okulungele kakhulu
Ngenxa yokuthi ziphumelela kakhulu ekukhiqizeni i-spectrum egcwele yemvamisa enokusabalalisa okubanzi, izikhulumi ze-PA ziyindlela engcono kakhulu ezindaweni zezentengiselwano lapho umsindo ophansi uphansi khona (ngokuvamile ungaphansi kuka-65 kuya ku-70 dB(A)). Izindawo zokuthengisa zithembele kakhulu kulezi zikhulumi ukudala isimo somkhiqizo esijulile ngomculo wangemuva osezingeni eliphezulu, ngenkathi zisetshenziswa ngesikhathi esifanayo ekubhaleni izikhala zabasebenzi. Izindawo zezinkampani zisebenzisa izikhulumi ze-PA ezifakwe ophahleni ezindaweni zokuphumula kanye nezindawo zokuphumula ukuze zinikeze ulwazi oluhle lokuzwa.
Ngaphezu kwalokho, izikhulumi ze-PA zakhiwe ngokucabangela ukuhlanganiswa kwezakhiwo. Abakhiqizi banikeza la mayunithi ngefomethi ephansi efakwe ophahleni, ama-pendant sphere ophahleni lwezakhiwo ezivulekile, kanye namakhabethe acwebezelayo afakwe phezulu. Nakuba ngokuvamile kubhekwa njengezixazululo zangaphakathi, izikhulumi eziningi ze-PA zanamuhla zinezingxenye eziguquguqukayo, okwenza zifaneleke kuma-patio okudlela angaphandle kanye namapaki etimu lapho ukuthembeka komsindo kuhlala kuyinto eza kuqala.
Iyini Isikhulumi Sesigodlo
Isikhulumi se-horn siyi-transducer ekhethekile ye-electro-acoustic eyenzelwe ukwandisa ukuphuma kwe-acoustic, ukuvela, kanye nokusebenza kahle. Esikhundleni sokuthembela kukhoni enkulu, ekhipha imisebe ngqo, isikhulumi se-horn sisebenzisa i-diaphragm encane, eqinile egcinwe ngaphakathi komshayeli wokucindezela. Lo mshayeli uhlanganiswe ngomshini nomphimbo omncane we-acoustic waveguide (ngokuvamile ububanzi bokuphuma obuyi-intshi eyodwa noma ezimbili)—isakhiwo se-horn esivuthayo esinika idivayisi igama layo.
Isici esichazayo sesipikha se-horn yikhono laso lokwenza ukufanisa i-acoustic impedance. Umshayeli wokucindezela udala amaza omsindo ngokucindezela okuphezulu kakhulu ngaphakathi komphimbo omncane we-horn. Njengoba amaza omsindo ehamba ngaphandle ngokuvuleka okwandayo, ingcindezi iyancipha ngenkathi ijubane lezinhlayiya likhuphuka, lihambisana kahle ne-impedance yomoya ovulekile. Lesi senzo esifana ne-transformer sivimbela ukubonakaliswa okukhulu kwe-acoustic, okuvumela cishe wonke amandla e-acoustic ukuthi akhishwe phambili.
Ngenxa yalokhu kusebenza kahle okukhulu, izipikha ze-horn zidinga amandla kagesi amancane kakhulu ukuze zikhiqize amazinga aphezulu okucindezela komsindo uma kuqhathaniswa nezipikha ze-PA zendabuko. Isipikha se-horn esijwayelekile singavame ukukhiqiza i-105 dB kuya ku-110 dB yokukhipha kusuka ku-watt eyodwa yamandla e-amplifier alinganiswa kumitha elilodwa, uma kuqhathaniswa ne-85 kuya ku-90 dB kuphela yesipikha se-cone esijwayelekile. Kodwa-ke, imvamisa ephansi kakhulu uphondo olungayikhiqiza ngempumelelo inqunywa ukujikeleza komlomo walo. Ngenxa yalokho, izipikha eziningi ze-paging zezentengiselwano azikwazi ukukhiqiza imvamisa ephansi ye-bass, okuholela kuphrofayili yomsindo egxile kumaza aphakathi nendawo kanye namaza aphezulu (ngokuvamile angu-300 Hz kuya ku-8,000 Hz).
Indlela umthwalo wempondo okhulisa ngayo ukubikezela
Ukufakwa kwempondo kushintsha kakhulu indlela igagasi lomsindo eliqondiswa ngayo. Ngenkathi umshayeli wekhoni elingenalutho echitha amandla e-acoustic kuzo zonke izinhlangothi, izindonga eziqinile zegagasi lempondo zivimba igagasi lomsindo, ziliphoqa ukuba libe iphethini ethile yokumboza ebikezelwayo. Ngokuvimbela amandla omsindo ukuthi ahlakazeke ngokuqondile noma eceleni ezindaweni eziseduze, uphondo lugxila wonke amandla e-acoustic atholakalayo aqonde phambili nge-axis yalo eyinhloko.
Lokhu kuqongelela kwamandla kuvumela izikhulumi ze-horn ukuthi zifinyelele amabanga amakhulu okuphonsa, ngokuvamile ziveza inkulumo eqondakalayo amamitha angu-50 kuya kwangu-150 noma ngaphezulu. Umklamo ongokoqobo uqinisekisa ukuthi amaza omsindo avame kakhulu ahlala ehambisana, okuvumela imvamisa yokukhuluma ebalulekile yenkulumo yomuntu (2 kHz kuya ku-4 kHz) ukuthi idlule ezindaweni ezixineneyo nezinomsindo ngempumelelo enkulu kunomthombo womsindo osakazeka kabanzi.
Ukusetshenziswa kwangaphandle kanye nezimboni okulungele kangcono
Izakhiwo ze-acoustic zezikhulumi ze-horn zizenza zibe ukukhetha okuhamba phambili ezindaweni zangaphandle kanyeizicelo zezimboni ezisindayoEzindaweni ezifana neziteshi zesitimela, amachweba okuthumela izimpahla, kanye namagceke okhuni, ukumemezela isimemezelo ebangeni elide kuyimfuneko yokusebenza. Ibhendi elincane lemvamisa yesipikha se-horn lihlunga ngokwemvelo umsindo ophansi wezinjini zedizili kanye nemishini esindayo, okuqinisekisa ukuthi isignali ye-paging yezwi ithatha isikhala esicacile nesizwakalayo ku-spectrum ye-acoustic.
Ngaphezu kwalokho, izipikha ze-horn ziqinile ngokwemvelo. Ngenxa yokuthi i-diaphragm ethambile ivalwe ngokuphephile ngaphakathi kwebhokisi elisindayo lomshayeli wokucindezela, ivikelwe ezintweni zezulu. Izipikha eziningi ze-horn zezentengiselwano zakhiwe ngepulasitiki ye-ABS engamelana ne-UV, i-aluminium ephothiwe, noma i-fiberglass, zithola kalula izilinganiso ze-IP66 noma ze-IP67 futhi zisebenza kuma-band okushisa aphezulu (isb., -40°C kuya ku-+60°C). Lokhu kuzenza zilungele izindawo zasolwandle, ukufakwa kwesimo sezulu esibi kakhulu, kanyeizindawo zokukhiqiza eziyingozi.
Ukuqhathaniswa Kwemininingwane
Uma kuhlolwa izikhulumi ze-PA uma kuqhathaniswa nezikhulumi ze-horn zomklamo womsindo wezentengiselwano, izihlanganisi ze-AV zithembele kusethi ejwayelekile yezincazelo ze-electro-acoustic ukubikezela ukusebenza kwesistimu. Isofthiwe yokumodela i-acoustic, njenge-EASE (Enhanced Acoustic Simulator for Engineers), isebenzisa lezi zincazelo ukukhiqiza amamephu okushisa amazinga okucindezela komsindo kanye namaphuzu okuzwakala kuwo wonke imodeli yedijithali ye-3D yendawo.
Izilinganiso ezibaluleke kakhulu zifaka phakathi impendulo yemvamisa, ukuzwela (i-SPL ku-1W/1m), i-nominal coverage angle, kanye ne-Speech Transmission Index (STI) ephumela lapho. Ngaphezu kwalokho, imininingwane ebonakalayo nekagesi inquma ukusinda kwehadiwe kanye nezindleko eziphelele zobunikazi phakathi nesikhathi sayo sokusebenza.
| Ukucaciswa Ubukhulu | Isipikha Esijwayelekile se-PA (Ubuso/Uphahla) | Isipikha Se-Horn (Ukuhlela Amakhasi/Imboni) |
|---|---|---|
| Impendulo Yokuvama | 60 Hz – 20,000 Hz (Ububanzi Obugcwele) | 250 Hz – 10,000 Hz (Ibhendi Yezwi) |
| Ukuzwela (1W/1m) | 85 dB kuya ku-95 dB | 105 dB kuya ku-115 dB |
| I-engela Yokumboza Okujwayelekile | 90° kuya ku-120° (Iyindilinga/Ibanzi) | 40° kuya ku-60° (Iqondisa Kakhulu) |
| Ama-Power Tap ajwayelekile | 1.5W, 3W, 6W, 15W, 30W | 7.5W, 15W, 30W, 60W, 100W |
| Icala Lokusetshenziswa Okuyinhloko | I-BGM, i-FGM, i-Paging yangaphakathi | Isaziso Esiphuthumayo Sokwanda, Ngaphandle |
| Isilinganiso se-IP esijwayelekile | I-IP20 kuya ku-IP44 (Engaphakathi/Embozwe) | I-IP66 kuya ku-IP67 (Isimo Sezulu Esibi) |
| Izinto Zokufaka | I-MDF, i-ABS elula, amathini angemuva ensimbi | I-ABS enamandla, i-Aluminium, i-Fiberglass |
Impendulo yemvamisa, i-SPL, kanye ne-angle yokumboza
Njengoba kuchaziwe ekuqhathanisweni kwemininingwane, impendulo ebanzi yemvamisa yesipikha esijwayelekile se-PA ivumela ukukhiqizwa komculo okucebile, kodwa leli khono eliphelele lidinga amandla e-amplifier engeziwe (ngokuvamile kusuka ku-15W kuya ku-30W ngesipikha ngasinye) ukuze kufezwe ama-SPL aphezulu. I-engeli yayo ebanzi yokumboza isho ukuthi umsindo unyamalala ngokushesha ebangeni, kulandelwa umthetho wesikwele ophambene (-6 dB ngokuphindwe kabili kwebanga).
Izikhulumi ze-Horn zisebenza ngezilinganiso zezibalo ezihluke ngokuphelele. Impendulo yazo yemvamisa encishisiwe ihlanganisa kahle ububanzi bezwi lomuntu. Ngenxa yokuthi amandla awachithwa aphinde akhiqize amaza aphansi adinga amandla, ukuzwela kuphezulu kakhulu. Uma kuhambisana ne-engeli yokumboza eqinile, le SPL esendaweni iqondiswa ngqo lapho idingeka khona ngokudonsa amandla okuncane (ngokuvamile ifinyelela ama-SPL aqondiwe ngamandla aphakathi kuka-2W kuya ku-5W kuphela).
Ukuqondakala, ibanga lokuphonsa, kanye nekhwalithi yomculo
Ukuzwakala komsindo wezentengiselwano kulinganiswa ngokulingana kusetshenziswa i-Speech Transmission Index (STI), isikali esisuka ku-0.0 kuya ku-1.0. Amakhodi okuphepha kokuphila (njenge-NFPA 72 noma i-EN 54-24) ngokuvamile adinga okungenani i-STI engu-0.45 kuya ku-0.50 kuma-alamu ezwi aphuthumayo. Emabangeni amafushane emakamelweni aphathwe nge-acoustic, izikhulumi ze-PA zithola amaphuzu amahle kakhulu e-STI (ngokuvamile >0.60). Kodwa-ke, ezindaweni ezinkulu, eziphindaphindayo, ukusabalala okubanzi kwesipikha se-PA kujabulisa insimu yokuphindaphindayo yegumbi, okubangela ukuphindaphindeka okufana okonakalisa kakhulu i-STI.
Izipikha ze-Horn ziphumelela kakhulu ekugcineni amaphuzu aphezulu e-STI ebangeni elide lokuphonsa ezindaweni ezinolaka ze-acoustic. Ngokubeka amandla e-acoustic emsebeni omncane, isipikha se-horn sinciphisa ukubonakaliswa ophahleni nasezindongeni eziseceleni. Kodwa-ke, le phrofayili efanayo ye-acoustic yenza izipikha ze-horn zingafaneleki ukudlala umculo wekhwalithi ephezulu, njengoba ukuntuleka kwe-bass kanye ne-middlerange egcizelelwe ngokweqile kungabangela ukukhathala kwabalaleli uma kusetshenziselwa umculo wangemuva oqhubekayo.
Izindleko, ukuqina, kanye nenani lomjikelezo wokuphila
Ngokombono wezindleko ezinkulu (i-CAPEX), izikhulumi ze-PA zezentengiselwano ezijwayelekile ngokuvamile zishibhile ngeyunithi ngayinye (ngokuvamile zibiza u-$40 kuya ku-$150 USD) kunezikhulumi ze-horn zezimboni ezisebenza kanzima. Kodwa-ke, inani lazo lomjikelezo wokuphila lincike kakhulu emvelweni; ukusebenzisa izikhulumi ze-PA zangaphakathi ezijwayelekile ezindaweni ezinomswakama ophezulu noma ezingaphandle kuzodinga ukushintshwa njalo (ngokuvamile kwehluleka phakathi neminyaka emi-2 kuya kwemi-3).
Izipikha ze-Horn zimelela utshalomali lokuqala oluphezulu ($100 kuya ku-$400+ USD) kodwa zinikeza ukuqina okuphezulu kakhulu kanye nenani lomjikelezo wokuphila ezindaweni ezidinga kakhulu, ngokuvamile zinesikhathi sokusebenza seminyaka eyi-15 kuya kwengama-20. Izinto ezifana ne-UV-stabilized polycarbonate kanye ne-spun aluminium zimelana kakhulu nokuwohloka kwemvelo. Ngaphezu kwalokho, izishayeli eziningi zokucindezela eziphezulu zine-diaphragm ye-voice coil engashintshwa ensimini, okuvumela ochwepheshe ukulungisa umshayeli oqhumile ngentengo encane kunezipikha ezintsha.
Indlela Yokukhetha Isikhulumi Esifanele
Ukukhetha ubuchwepheshe besipikha esifanele kuyinqubo ehlanganisa imikhakha eminingi edinga ukuhlola imisindo yezakhiwo, imikhawulo yobunjiniyela kagesi, kanye namakhodi okuhambisana nokuphepha kokuphila. Abahlanganisi kumele baklame i-array esatshalaliswe enikeza ukumbozwa okufanayo, ehlangabezana nesilinganiso esidingekayo sesiginali-kuya-kumsindo (inhloso ejwayelekile ingu-+10 dB kuya ku-+15 dB ngaphezu komsindo ozungezile), futhi ihlanganiswe ngokuphephile nengqalasizinda ekhona yesikhungo.
Isigaba sokuklama kufanele siqale ngokuhlola indawo ngokucophelela noma ukuhlaziywa kwemidwebo yezakhiwo. Ukumodela kwe-acoustic kunconywa kakhulu ezindaweni eziyinkimbinkimbi ukubikezela ukuthi ukuqondiswa kwe-horn noma ukusabalala okubanzi kwesipikha se-PA kuzosebenzisana kanjani nemingcele ebonakalayo yegumbi.
Qondanisa uhlobo lwesipikha nendawo kanye nezithameli
I-matrix yokuqala yesinqumo esibucayi ihilela ukufanisa i-transducer nomsindo wendawo ezungezile kanye nomsebenzi oyinhloko wezilaleli. Abahlanganisi kumele balinganise amazinga omsindo wendawo aphakathi nendawo kanye naphezulu (ku-dB-A) wendawo.
| Indawo ezungezile | Umsindo Ojwayelekile Wendawo (dB-A) | Uhlobo Lwesipikha Esinconyiwe | I-Target Paging SPL (dB-A) |
|---|---|---|---|
| Ihhovisi Lenkampani / Umtapo Wezincwadi | 40 dB – 50 dB | Uphahla/Umphezulu we-PA | 55 dB – 65 dB |
| Isitolo Sokuthengisa / Indawo Yokudlela | 60 dB – 70 dB | Isilingi/Iphendanti PA | 75 dB – 85 dB |
| Igalaji Lokupaka Likamasipala | 75 dB – 85 dB | Uphondo Oluqondisayo | 90 dB – 100 dB |
| Ukukhiqiza / Igceke Lesitimela | 85 dB – 95+ dB | Uphondo Olukhipha Kakhulu | 100 dB – 110+ dB |
Uma indawo iyindawo yokuthengisa enomsindo ozungezile ongu-65 dB, inethiwekhi yezikhulumi ze-PA ezifakwe ophahleni izohlinzeka kalula nge-paging ecacile ngenkathi igcina impendulo ebanzi yemvamisa edingekayo kumculo wangemuva osezingeni eliphezulu.
Ngakolunye uhlangothi, uma indawo iyindawo yokupaka kamasipala enezinga lomsindo ozungezile elingu-85 dB ngenxa yethrafikhi yezimoto, isikhulumi se-PA esijwayelekile cishe sizohluleka ukuletha imiyalezo ecacile. Uhlelo kufanele lusebenzise izikhulumi eziqondiswe phansi emizileni yokushayela ukuze zinqamule umsindo wenjini futhi zilawule amandla e-acoustic, zivimbele ukuthi zingagxumi ngokungapheli kuma-slab ekhonkrithi. Kulesi simo, izethameli zidinga kuphela ukuzwa imiyalelo yokuphuma noma izixwayiso zokuphepha.
Hlola amandla, impedance, isilinganiso sezulu,
kanye nezidingo zokufaka ukuqinisekisa ukuthembeka kwesikhathi eside. Uma izidingo ze-acoustic sezihlangatsheziwe, qinisekisa ukuthi isikhulumi esikhethiwe sihambisana namakhono wamandla we-amplifier (ukugcina umkhawulo we-headroom okungenani ongu-20%) kanye nesakhiwo se-impedance yesistimu (isb., 70V/100V vs. 8-ohm). Ngaphezu kwalokho, buyekeza ngokucophelela isilinganiso se-IP (Ingress Protection). Ngenkathi izikhulumi ze-horn ziphumelela ngokwemvelo ezimweni ezinzima, abakhiqizi abaningi manje banikeza izikhulumi ze-PA eziqondile ezimelana nesimo sezulu, ezinesilinganiso se-IP55 ezindaweni zangaphandle. Ngokuphambene nalokho, izikhulumi ze-horn zivame ukufakwa ngaphakathi ezikhaleni ezinomsindo, eziphindaphindayo njengezitshalo zokukhiqiza. Ekugcineni, ukukhetha phakathi kwesipika se-PA nesipika se-horn kwehlela ekulinganiseni ukuthembeka komsindo ngokumelene nokukhishwa okungavuthiwe kanye nokuqondisa. Ngokuhlola umsindo ozungezile, ibanga elidingekayo lokuphonsa, kanye nokuqukethwe komsindo okuyinhloko, abaklami besistimu bangasebenzisa ubuchwepheshe obufanele bokuxhumana okucacile nokuthembekile.
Izinto Ezibalulekile Okufanele Uzicabangele
- Sebenzisa izipikha ze-PA ezikhipha imisebe ngqo uma udinga ukumbozwa okubanzi nokwemvelo kwezwi nomculo ebangeni elibanzi lemvamisa, ngokuvamile cishe phakathi kuka-60 Hz kuya ku-20,000 Hz.
- Sebenzisa izipikha ze-horn lapho okubaluleke kakhulu kuwukuzwakala kwezwi okusebenzayo kakhulu ebangeni elikude, ikakhulukazi ezindaweni ezinomsindo, zangaphandle, noma zezimboni.
- Hlela ukumbozwa ngokuhlakazeka: izikhulumi eziningi ze-PA zisakaza umsindo cishe ngo-90° kuya ku-120°, kuyilapho izikhulumi ze-horn zingagxila umphumela cishe ku-60° ngo-40° noma ziqine kakhulu.
- Ngezicelo zesaziso esiphuthumayo kanye nesaziso esikhulu, klama uzungeze izinhloso zokuzwakala njenge-STI engaphezu kuka-0.50 kunomsindo wodwa.
- Gwema ukusebenzisa izipikha ze-horn njengezipikha zomculo eziphelele ngoba amamodeli amaningi alahlekelwa amandla okukhipha imvamisa ephansi kakhulu ngaphansi kwama-300 Hz.
- Qondanisa uhlobo lwesipikha nezimo zendawo, okuhlanganisa umsindo ozungezile, ibanga lokuphonsa, ukuphakama kophahla, ukuchayeka esimweni sezulu, kanye nezidingo zendawo eyingozi.
imibuzo ejwayelekile ukubuzwa
Ingabe isikhulumi se-PA sifana nesikhulumi se-horn?
Akuyona ngempela. Isipikha se-PA sivame ukuba yigama elibanzi, kodwa emsindweni osatshalaliswe ngokuvamile sisho isipikha esikhipha imisebe ngqo. Isipikha se-horn sisebenzisa umshayeli wokucindezela kanye ne-horn evuthayo ukuze siveze umsindo kude nangendlela ephumelelayo.
Kufanele ngikhethe nini isikhulumi se-horn?
Khetha isipikha se-horn sokubhala amakhasi akude, izaziso eziphuthumayo, izindawo zangaphandle, noma izindawo zezimboni ezinomsindo lapho ukuqondakala kwenkulumo kanye nokuqoshwa kwayo kubaluleke kakhulu kunekhwalithi yomculo.
Kunini lapho isikhulumi se-PA esijwayelekile singcono khona?
Isipikha se-PA esijwayelekile singcono kakhulu ekumbozweni komsindo obanzi nowemvelo, ikakhulukazi lapho umculo, izimemezelo, kanye nokukhiqizwa kwezwi okulinganiselayo kudingeka khona emahhovisi, emakhampasi, ezitolo, noma ezindaweni zangaphakathi.
Kungani izikhulumi ze-horn zivame ezindaweni zezimboni?
Izipikha ze-Horn zisebenza kahle, ziqondisa, futhi ziyakwazi ukudlula umsindo ophakeme. Lokhu kuzenza zibe usizo ezimayini, uwoyela negesi, ezokuthutha, ezokwakha, ezolwandle, nakwezinye izindawo ezinzima.
Ingabe izikhulumi ze-horn zizalisa kahle i-bass?
Ngokuvamile cha. Izipikha ze-Horn zilungiselelwe ukuzwakala kwezwi futhi zivame ukugoba ngokucijile ngaphansi kwama-300 Hz, kuyilapho izipikha eziningi ze-PA zingamboza ububanzi obubanzi, ngokuvamile zizungeze ama-60 Hz kuya kuma-20,000 Hz.
Isikhathi sokuthunyelwe: Juni-18-2026