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CESA2019:比車載揚聲器數量還多的,是Bose展示降噪新科技

分類:科技智慧 瀏覽數:31 2019-06-30 01:59 愛活網 penylo 編輯: 厚學

40多年前,Amar G. Bose博士對飛機噪音很不滿,在回到公司后組織了一幫MIT技術宅發明了一套主動降噪系統,并率先運用到飛行人員與地勤人員的耳機中,Bose降噪與聲音技術從此聞名。

從軍事、工業降噪到消費品,對于Bose而言,消費級降噪完全就是降維打擊。QC系列降噪耳機一直存在于男女朋友的送禮榜單前列,豪車選配,甚至是助眠產品中。

說到車載音質,那可就是Bose強項之一了,十幾個揚聲器布滿全車,還能確保低頻澎湃高頻清晰,買車的時候不將其列入選配列表,多少還有點虧了的感覺。但Bose認為揚聲器多還遠遠不夠,在CESA2019上,他們又秀了一波來自MIT的技術宅精神,沒錯,是很硬核那種技術。

胎噪,也是能主動降噪的

在發動機主動降噪技術之后,Bose把注意力放到了胎噪上。在今年初,他們就宣布了這套名為Bose QuietComfort主動路噪消減(RNC)技術,并向全球汽車制造商開放。這意味著,Bose旗下已經推出了包含發動機諧波降噪(EHC)技術和Bose發動機諧波增強(EHE)技術在內的三套車載主動降噪技術。是的,Bose車載揚聲器就算不放音樂,也很有用處的樣子。

這是一套依靠加速傳感器、專有信號處理軟件、麥克風和車載音響系統的降噪技術,Bose通過安裝在車內的麥克風與傳感器,持續測量噪聲源頭的振動。這些信息隨即被用于計算與噪聲信號反相的聲學信號,并通過汽車揚聲器播放,以有效消減目標噪聲。

有意思的是,Bose表示這套QuietComfort主動路噪消減技術并非一定要搭載Bose高級音響系統。只要在開發周期中與Bose協作,加入主動路噪消減系統的方案,通過測試調節,就能獲得車輛全壽命周期內的自動調整降噪效果。

現在Bose已經與主機廠展開合作,最快這套技術會在2021年底開始投產。

比高端更高端,Performance至臻參上

沒有什么比在車內塞入更多車載揚聲器,能更直接的獲得音響效果。凱迪拉克XT6就這么做了,并且一步到位,用上了Bose Performance至臻系列音響系統,Logo不僅更長,也更豪華。換而言之,這是Bose專門針對豪華車型打造的全新系統。

在凱迪拉克XT6上,一共搭載了14個揚聲器,硬件、軟件和工業設計都使用了Bose最高階的水準,并包含了多項Bose特有的數字信號處理技術。

引用Bose的官方介紹:

車艙前部的中高頻單元包括儀表臺中央一只9厘米Bose Twiddler中高頻揚聲器、兩側前門上部各一只8厘米Twiddler釹磁鐵中高頻揚聲器和兩側A柱內各一只2.5厘米釹磁鐵高頻揚聲器,保證了車艙前部中高頻段的最佳音質。低頻單元由兩側前門內各一只強勁的15×23厘米長沖程低頻揚聲器和前排座椅底部10.5升箱體內的一只Richbass低頻揚聲器組成,可獲得震撼的低音效果。在車艙后部,兩側后門均內置一只2.5厘米釹磁鐵高頻揚聲器和一只13厘米寬頻揚聲器,另有兩只6厘米Twiddler中高頻揚聲器分裝于兩側D柱內,滿足車艙后部的全頻音域和寬廣聲場。

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