Active and passive noise cancellation

Bose has added a third model to its range of QuietComfort headphones. The QuietComfort 15s join the QuietComfort 2 and 3 in offering noise cancellation, but Bose reckons this is the “best noise cancelling headphone” that the company offers.

Aethetics-wise, they look almost identical to the QuietComfort2s – the only difference being that the “on” light is now green, where once it was red. However, internally they’re a little more complex. There’s now microphones both inside and outside of the ear cups, to better cancel incoming sounds.

We’re also assured that the proprietary algorithms that work out which sounds to block are more sophisticated, so you’ll hear more Slayer in your ears, and less of the drunk businessman leering at the female passengers on the tube.

Lastly, the ear cushions have been redesigned to provide a bit of additional passive attenuation of sound. The materials that the cushions are made of have been selected specially for their noise-blocking capabilities.

The QuietComfort 15s are powered by a single AAA battery, which should give you 35 hours of listening. The power indicator will start flashing when there’s less than five hours remaining, and the earcups fold flat for easy packaging.

They’ll go on sale in September, and will cost 280.

Related links:

• News – Bose launches QuietComfort 3 headphones
• Link – Bose Quietcomfort Headphones

Tags:
Audio Headphones Bose Bose Quietcomfort 15

Bose QuietComfort 15 launched originally appeared on Pocket-lint on Wed, 26 Aug 2009 15:06:11 +0100

Continue reading from the original source:
NEWS: Bose QuietComfort 15 launched

Bose has brought out its cool new offering, the QuietComfort 15 headphones. Along with advanced noise reduction technology these also have microphones placed both inside and outside the earcup for better treatment of ambient and atmospheric sounds

Go here to see the original: 
Bose QuietComfort 15 headphones are a sequel to the QuietComfort 2

Well, there are very few things that Apple holds back from its fans when it comes to the iPhone. With the 3GS model displaying traits that have proved to overcome more than a single disadvantage of the original phone, we can see a new dimension of thought being put into play. There’s word that the 3GS may just be capable of playing back 1080p HD videos.

See the rest here:
Is the iPhone 3GS HD ready? Maybe!