Bose noise-masking sleepbuds

來自專欄 EE 科普5 人贊了文章

Bose 去年眾籌了一款睡眠降噪耳塞，就是希望人們睡覺的時候使用，播放白雜訊等聲音，從而代替傳統的海綿耳塞。當時看了介紹就非常喜歡，今年6.20號紐約發售，作為腦殘粉第一時間就購買（網上預購七月中旬才發貨，要去 WTC ，活著洛克菲勒中心的店裡購買），如果簡單就作購買指導，直接可以說：

Nap （0-120mins）時使用還是非常棒的；長時間使用絕對不推薦。

但這個 sleepbuds 在接觸和使用過後感觸頗多，還是值得寫文章去分享給大家的。

Bose noise-masking sleepbuds | Bose?

www.bose.com

PS：文中圖片版權歸bose所有，是本人直接從官網 『摘』下來的。

工藝&設計

雖然開蓋過程的燈有十足的未來感，但不流暢的開蓋的體驗（他會開一半卡住，我並不清楚這是設計理念還是設計失誤，我實在想不明白），真的太不應該了。

https://www.zhihu.com/video/997491541560115200

內部構造官網是這麼展示的：

Bose之前的產品在 工藝 上是從來沒有『大放光彩的』，而這次的設計真的是用心了

官方是這麼解釋原理的：

Bose sleepbuds are designed to help you sleep. Instead of streaming music, they deliver soothing sounds that cover up unwanted noise and help you fall asleep and stay asleep. Choose from 10 pre-loaded soothing sounds, some optimized for masking and others for relaxation.

這是一個很大的篇幅：

A better solution for unwanted noise

For many, Bose is synonymous with active noise reduction (ANR). Our Acoustic Noise Cancelling technology is found in many of our world-class headphones, like QuietComfort 35 headphones II and QuietControl 30 wireless headphones. However, even when combined with the way earbuds or headphones passively seal off sound from your ear, ANR can』t make unwanted sounds, particularly at voice frequencies, completely inaudible (like your partner snoring right in your ear). So we created a new solution using noise masking, which works because of the way different sound frequencies combine in your inner ears. If the different sounds have the right match of frequencies, and the masking sound is just enough louder than the disturbing sound, your inner ear and brain cannot detect the disturbing sound. It fades from your memory as you drift off to sleep.

Can you add your own sounds or stream music to achieve the same effect? No, but there』s a reason for that. First, streaming audio demands a bigger battery, which means we would need to create much bigger sleepbuds—not a great option when it comes to comfort. Instead, we store the sound files in the sleepbud, which dramatically extends the battery life. The result? Sleepbuds built for all-night comfort and performance. Plus, we』re confident in our technology focus on optimizing the masking and/or relaxation experience. Try them—we』re sure you』ll agree. And we』ll be adding more soothing sounds with future software updates.

我就不全文翻譯了，簡單介紹一下吧：

• 播放歌曲需要更大的電池，會影響舒適性。於是就設計了只能播放預置的白噪音了。
• 主動降噪技術在特定頻率聲波下（打呼嚕）是做不到的，只有去用白雜訊去「蓋」住外界噪音。

我覺得是這樣的：本來預計是 主動降噪 ANR 的，但是變成了masking，有很大原因是現在的降噪晶元能耗還是太高了，stream music 都帶不起來，那麼 ANR 是更天方夜譚了。

使用體驗：安靜+硬+憂慮

市面上比較好的海綿耳塞，標稱可以達到-33db，但如果把音量開這麼高，大概1/2？，那麼『遮蓋噪音』效果就完全比耳塞要更厲害。但這就是在用一個噪音去掩蓋另一個噪音。

有了白噪音，外界噪音會大量減少，但如果睡覺的時候根本就不愛聽白噪音，就希望盡量降低噪音，還是選擇一個合適的海綿耳塞吧！

舒適性：

官網是這麼介紹 tips 的：

「The tiny earbud nodule and soft StayHear+ Sleep tips (in three sizes, S/M/L) are designed with side sleepers and toss-and-turners in mind. They fit comfortably and snuggly in your ear for a good night』s rest.「

但實際體驗效果並不好，主要在翻身的時候，耳道會有異物感，我有天晚上半夜醒是因為耳道被咯疼醒的。本人長期睡覺使用耳塞，從來沒有疼醒（但是海綿耳塞一定要勤換，要不然會癢），可以說這個sleepbuds 所導致的異物感是因為材料硬所導致的。

安全性：

聽一夜白雜訊，會不會 損傷聽力！