市面上的真无线耳机越出越多，很多人也追求主动降噪功能。不过，每个人的耳道状况、对声音的灵敏度都不同。所以耳机的降噪效果是否恰度好处？会否带来闷局感觉？这些因素都会影响用户的体验。Bose 新推出的 QuietComfort Earbuds II，以自家智能耳内音场调校技术 CustomTune 作为卖点，为用户提供真正个人化降噪体验。
何謂CustomTune？當用戶戴上耳機後，會聽到一種獨特的音效。耳機內置的麥克風會收集耳道內反射的音效數據，根據每個人獨特的耳道結構計算出最適合的音質和降噪設定。所有調節都在不到半秒內完成。經過調校後，音樂不僅表現出更多細節，降噪效果也顯著提升。以往難以消除的噪音，如近距離的人聲或巴士上孩子的哭鬧聲，在用戶意識到之前逐漸淡出。同時，系統會即時感應用戶周圍環境的噪音變化，始終保持降噪效果。
In addition, the newly designed Fit Kit earbuds also enhance the noise-canceling ability of the headphones. In order to ensure a high level of fit between the headphones and the ears, the earbuds have changed from the traditional one-piece design to replaceable umbrella-shaped silicone earbuds and stabilizing rings. There are 3 sizes to choose from for both the earbuds and stabilizing rings, allowing for free combinations between different sizes. Even users with slight differences between their left and right ears can find the most suitable combination to ensure a secure and snug fit when wearing.
而 Bose Music App 也新增了耳机佩戴测试功能，系统通过播放特殊音效来测试耳机有无漏音，确保音质及消噪的表现。
