原文： On my search for an active noise cancelling headphone, I have tried: Bose QC3, Bose QC15, Sennheiser PXC 450, AKG K495, Audio Technica ATH-ANC27, Audio Technica ATH-ANC7b, and Audio Technica ATH-ANC9. Out of all the above here are some of my opinions. Please note that I am not even anywhere close
to being an expert in this field but I really enjoy listening to music of all kinds.
Bose QC3 and QC15: Best noise cancelling technology as you will read on just about every review. The QC15 was especially comfortable and lightweight but both felt cheaply made and seems like they may break easy. The other reason I didn't keep them was I would do a sound test (low volume, then do a max volume) using different kinds of music (electronica, classical, rap, techno, instrumental, acapella, jazz, etc.). Both of them failed on the bass when turned to max, became very distorted and ugly, like broken speakers.
Sennheiser PXC 450: was my favorite as I love the features (mute to talk to people around you, very very very comfortable). I may have received a defective one because with the noise cancelling feature on, it distorts the bass on high volumes, with it off, everything sounds perfect. Nice that it also folds flat in a thin case. Returned because why would I buy a noise cancelling headphone and not use that feature. Also, I tried it inside bus/train/car and when I talk while the music is off but the NC feature on, it does a "motorboating" sound.
AKG K495: The best sounding one and loudest one also. Super cool design with the headphones folding flat, rechargeable battery through USB, cool way to turn on NC (by twisting the headset), and SOUNDS AWESOME! Why didn't I keep it.... it HURTS my ears after 15-20 min. It's an on-the-ear type so it rests on your ear. They said it will get comfortable over time but I tried it everyday for 3 weeks and it didn't feel better. The material is comfortable to the touch but I couldn't get over the pain.
Audio-Technica ANC27, ANC7b, ANC9: Sound-wise, ANC9 blows all of them away. Much better than the 27, better than the 7b. Comfort wise, I can sleep with this on - super soft memory foam around your ears. Nice 3 way NC feature although I almost always use 1st and 2nd settings. ANC9 does not distort on high volumes even on the bass (there's a bass tester on YouTube). Sound is clearer with NC on than off. I love the feature of being able to still use it with the batteries dead unlike the Bose. I normally use it on a train ride but also used it for a flight from SF to NY. Peacefully quiet. You'll still hear a faint distant engine hum but if you take it off, you will see how loud that hum really is! No wonder NC headphones are so popular with the folks that fly often.
My only complaint is I am probably one of the very few unlucky ones who got a bad unit. After exactly 40 days, the left side started to have this slight distorted, motorboating sound. If I shake my head, I can hear clicking on the left ear. With bass heavy music, the left ear gets this slight, but still annoying, distortion. Right side is perfect. The nice folks I bought it from couldn't help me on the return due to it being over 30 days. Too bad and just my luck but I understand. I contacted Audio Technica and this is the best part. You call the number, and a live person answers. She gave me directions on how to send it back (I have to pay for shipping). I called them after a few days they confirmed receipt (live person again!) and said that they already sent me a brand new replacement. Audio Technica's service is great!! They really do back up their products and just made me look for more AT products in the future.
Sorry about the long review but I hope this helps you on your decision. I know my family was going nuts on seeing me with a new headphone almost every week during my search.
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译文： 在我寻找一个主动降噪耳机的时候，我试过：Bose QC3，Bose QC15，Sennheiser PXC 450，AKG K495，Audio Technica ATH-ANC27，Audio Technica ATH-ANC7b和Audio Technica ATH-ANC9。 以上这些都是我的一些意见。 请注意，我甚至不是这个领域的专家，但我真的很喜欢听各种音乐。
Bose QC3和QC15：最好的噪音消除技术，您将会在每一篇评论中读到。 QC15特别舒适轻便，但都感觉到价格便宜，看起来好像很容易破裂。 我没有保留的另一个原因是我会使用不同种类的音乐（电子音乐、古典音乐、说唱乐、电子乐、乐器、阿卡波拉、爵士乐等等）进行声音测试（小音量，然后到大音量）。在低音变成高音时，这两个都失败了，变得非常扭曲和难听，就像破碎的扬声器。
SennheiserPXC 450：是我最喜欢的，因为我喜欢的功能（静音与周围的人谈话，非常非常舒适）。 我可能收到了一个有问题的，因为噪音消除功能，它会在高音量下失真低音，随着它的关闭，一切听起来都很完美。 很好，它可以在薄的情况下平折。 返还的原因是，我为什么会买一个降噪耳机，而不是使用那个功能。 此外，我在公共汽车/火车/汽车里试了一下，当我播放音乐又说话时，它发出了一个“摩托艇”的声音。
AKG K495：最好的一个，也是最响亮的。 超酷的设计，耳机可折叠，通过USB充电，很酷的方式打开NC（通过扭转耳机）和SOUNDS AWESOME！ 为什么我没有保留它.... 15-20分钟后我的耳朵就疼了。 这是放在耳朵上的所以取决于你的耳朵。他们说，随着时间的推移，这种感觉会越来越好，但我都试三周了，感觉不太好 。这种料子摸起来很舒服，但我无法克服疼痛。
Audio-Technica ANC27，ANC7b，ANC9：ANC9听起来最好，ANC9把它们都吹走了。 比27更好，也比7b好。 最舒适的，我可以睡觉戴着这个，超软的记忆泡沫包裹着耳朵。 不错的三种NC功能，虽然我几乎总是使用第一和第二种设置。 即使在低音下，ANC9在高音上不会扭曲（YouTube上有一个低音测试仪）。 声音比NC更清晰。 我喜欢能够使用电池死亡的这一功能，不像Bose。 我通常在火车上使用它，但也用于从SF到纽约的航班。非常安静。你仍然会听到一个微弱的发动机嗡嗡声，但如果你把它关掉，你会听到真正的嗡声是多么的大声！难怪NC耳机在那些经常坐飞机的人中备受欢迎。
我唯一的抱怨是，我可能是少数几个倒霉的人之一。 在整整40天后，左侧开始出现轻微的扭曲，发出摩托艇的声音。 如果我摇头，我可以听到左耳声音。在低音重的音乐中，左耳有一点轻微的扭曲，但仍然令人讨厌。 右边是完美的。 我从一个挺善良的人那买的都不帮助我退换，因为它超过了30天。 太糟糕了，只是我的运气，但我明白。 我接触了Audio Technica，这是最好的部分。 你打号码，一个现场人员回答。 她给了我如何寄回的方法（我必须支付运费）。 我打电话给他们几天后，确认收据（又是那个人），并表示他们已经寄给我一个全新的替代品。 Audio Technica的服务是伟大的！ 他们真的做了他们的产品备份，并让我在未来能寻找更多的产品。
对于长期评论很抱歉，但我希望这可以帮助您做出决定。我知道我的家人在我的搜索过程中几乎每周都会带着新的耳机去看我.
