Shamwari yangu uye mushandi pamwe naye, Geoff Morrison, akagamuchira nguva yakawanda pamusoro penguva yekuti aongorore Bose QC-15 pamusoro-nzeve-kuchema musoro pamusoro paThe Wirecutter pamwe neBose QC-20 in-ear-annelling headphone paForbes. Vashandi vaSevvy vanogara vachitsvaka nzira dzakanakisisa dzinoda, saka vazhinji vevaverengi vaGeoff vakakumbira chati yechipimo inofanidza rwiyo-kubvisa basa rekunze-nzeve Bose QC-15 pamwe ne-inzwa Bose QC-20. Zvichibva pakuzivikanwa kwechikumbiro, ndakafunga kuti zvingabatsira kuisa pamwe chete.
Kuedzwa kwakaitwa kuburikidza ne GRAS 43AG nzeve / cheek simulator, computer yePareRTA software uye M-Audio MobilePre USB audio interface. Vose Bose QC-15 uye Bose QC-20 vakaenzaniswa vachishandisa nzira yakakodzera yehurukuro. Nharaunda dzakashandiswa kuedza dzakabva kubva paHz 20 kusvika ku20 kHz, iyo inowanzobudiswa yezviridzwa zvakawanda zvemazwi pamusika. Nhamba dziri pasi pe75 dB dzinoratidza kucheneswa kwekunze kweruzha (kureva, 65 dB pane chati zvinoreva -10 dB kuderedza mumanzwi emunharaunda panguva iyoyo inzwi rukuru).
Kuvhara kwechiso kweBose QC-15 kunoratidzwa mumutsetse wakaoma, nepo Bose QC-20 inoratidzwa mumutsara wepepuru. Saka apo iwe unotarisa pamifananidzo, unzwisise kuti iyo yakaderera mutsetse pane chati, zviri nani ruzha-kurambidza kune imwe nguva bhenji.
Kana iri kuuya kune "jet injini band" pakati peinenge 80 Hz ne300 Hz, Bose QC-20 inonyanya kukunda - yakawanda se 23 dB zviri nani-ku QC-15. Izvi zvinoreva kuti mu-nzeve kugadzirwa kweBose QC-20 inonyanya kubudirira pakudzikisa zvakadzama droning / kutinhira mhere-mhere, dzakadai saiyo inobva kumajini engoro. Izvi zvinotarisana nehutano hwepasi hwehutano hwevanhu hunowanikwa (manzwi manzwi kunyanya), izvo zvinogona kuita kuti Bose QC-20 inakire kune avo vangada kudzivisa kunze kukurukurirana.
Zvisinei, iyo-inoteve-nzeve Bose QC-15 inoparadzanisa QC-20 pamagetsi pakati pe 300-800 Hz uye kupfuura 2 kHz. Izvi zvinoratidza kuti Bose QC-15 inonyanya kukwanisa kudonha mhere-yepamusoro-soro, zvakadai semhando dzekutengesa dzinobva kune inotonhora kana mamiriro ekudzivirira mhepo pane ndege. Izvi zvinowanzoitawo mapurisa ari pakati nepakati kumusoro, kunyange zvakawanda kupfuura 2 kHz zvingave zviri pamiganhu yevanhu (semuenzaniso vana vaduku) kuimba kana imbwa kuputika.
Kusarudza pakati peBose QC-20 uye QC-15 kunogona kuvimba nemutauro / kutaridzika (in-ear versus over-ear) pamwe chete apo munhu anoronga kuishandisa. Zvinogona kuva zvakaoma kutaura kuti ndiani achaita basa rakanaka rekuchera mimhanzi uye mhemberero yakasununguka pa Starbucks, kubva pane kungotarisa zviyero.