I don't know if my input will help in any way but I do remember that there are products rather to *play* white noise or "pink noise" but that's nothing more than playing an mp3. Supposedly "helps you concentrate" if we take my flaky ex-coworker at his word at the time.
it's an interesting idea but doing dynamic sound calculations for an exact counter to all the acoustics of a room would be something that at best would take longer than the sound conditions of a "public" area would work. Maybe private. Think about it if you had a private area in which conditions (if you theoretically ran a digital recorder would give you several hours of the same sound with no new ones) are going to remain static then a math intensive analysis of the direct diametric oposite of the wave would work because the work wouldn't "expire" (ie get new sounds). Public you might get new sounds at least every 10-20 minutes. Let's cheat and say that the math can be crunched out in 15 minutes that would leave you with 'overlap' or 'delay' of 5 minutes where your program "wouldn't work". That's at least what I would think. Then again I've been suprised about what gets posted to freshmeat.net these days anyway. On Thu, Aug 6, 2009 at 6:34 AM, Mirco Piccin <pic...@gmail.com> wrote: > Hi, > i find this thread: > http://forum.audacityteam.org/viewtopic.php?f=28&t=442 > > It's quite old, but it could be a start point. > > The aim is to create an anti-phase in realtime. > This job is done by a don't-know small (and suppose poor) chip into some > headphones that provide noise cancelling/reduction. > So i suppose it's not so difficult to do the same using a pc process and > Debian (or other linux distro, of course). > > Of course i don't want absolute noise cancelling (i think that it's also > impossible). > A good reduction is enough. > > Regards > M > > > On Thu, Aug 6, 2009 at 12:08 PM, Mark Neidorff <m...@neidorff.com> wrote: > >> On Wednesday 05 August 2009 04:42 pm, John Hasler wrote: >> > M writes: >> > > i was considering to buy headphones with Active Noise Cancelling / >> > > Reduction. >> > > >> > > But before spend money, i'd like to know if there's a software that >> > > could do the same job (for free). >> > >> > No. Not feasible. >> > -- >> > John Hasler >> >> Is it technically not feasable, meaning that a room is too large to do >> noise >> cancelling in, or not feasable from the linux software prespective? >> >> Mark >> >> >> -- >> To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org >> with a subject of "unsubscribe". Trouble? Contact >> listmas...@lists.debian.org >> >> >
