Abokina da abokin aikinmu, Geoff Morrison, sun karbi hankali a kan lokaci don sake dubawa na Bose QC-15 a kan murya-muryar murya akan Wirecutter da kuma Bose QC-20 a cikin murya-sokewa a kan Forbes. Masu amfani da kyauta suna neman samfuran da suka fi dacewa, yawancin masu karatu na Geoff sun buƙaci ginshiƙi wanda ya kwatanta aikin ƙwaƙwalwa na kunne na Bose QC-15 a cikin Bose QC-20. Bisa sanannun bukatun, Ina tsammanin zai taimaka wajen sanya daya tare.
An gwada gwaji ta amfani da GRAS 43AG kunne / kullin na'urar kwaikwayo, kwamfutar tafi-da-gidanka da ke gudana software na TrueRTA da kuma M-Audio MobilePre Kebul na Intanet. Dukansu Bose QC-15 da Bose QC-20 an auna su ta amfani da tashar mai ji dadi. Ma'aikatan da aka yi amfani da wannan gwajin sun kasance daga 20 Hz zuwa 20 kHz, wanda shine kayan aiki na kowa don yawancin na'urorin mai jiwuwa akan kasuwa. Matakan da ke ƙasa 75 dB suna nuna alamar muryar waje (watau 65 dB a kan ginshiƙi yana nufin rage -10 dB a waje da sautuna a wannan sautin mota).
An nuna alamar Bose QC-15 a cikin wani wuri kore, yayin da Bose QC-20 aka nuna a cikin launi mai launi. Don haka kamar yadda ka dubi mai zane, gane cewa ƙananan layin a kan zane, mafi mahimmancin ƙwanƙwasawa ga ƙwararrun mita.
Idan yazo da "jet engine engine" a tsakanin kimanin 80 Hz da 300 Hz, Bose QC-20 yana da kyau sosai - kamar yadda 23 dB mafi alhẽri - zuwa QC-15. Wannan yana nufin cewa shirin na Bose QC-20 yana da tasiri sosai wajen rage hawan giraben ruwa, kamar waɗanda suke fitowa daga motar jirgin sama. Wannan rukunin mita yana kuma rufe maganganun ɗan adam na al'ada (maɓalli na musamman), wanda zai iya yin kyakkyawan shiri na Bose QC-20 ga waɗanda za su so su tsai da tattaunawa a kusa.
Kodayake, Bose QC-15 ya nuna cewa QC-20 a tsakanin mahimmanci tsakanin 300-800 Hz kuma ya fi 2 kHz. Wannan yana nuna cewa Bose QC-15 yana da ikon yin sauti da sauti mafi girma, irin su nau'in ƙyamar da aka samo daga tsarin dumama ko tsarin kwandishan a kan jiragen sama. Wadannan rukunin jeri sun hada da matsakaicin tsakiya da babba na maganganun mutum, ko da yake fiye da 2 kHz zai kasance tare da layin mutane (misali ƙananan yara) raira waƙa ko karnuka ke yin ta.
Zaɓan tsakanin Bose QC-20 da QC-15 na iya dogara ne akan fifiko / biyan kuɗi (a cikin kunnen da kunne) da kuma inda mutum yayi niyya don amfani dashi. Zai iya zama da wuya a ce wanda zai yi aiki mafi kyau na yanke fitar da waƙa da kuma bayanan sirri a Duka, a kalla daga kallon kawai kawai.