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SoundCurtainCurrent Version: 1.3

"Best App for Creating Quiet Workspaces"
- Forbes.com, 10 Top iPhone Apps For Road Warriors

"Best App for Shutting Out Noise"
- O'Reilly, Best iPhone Apps

"If you struggle trying to concentrate with irritating noises going on all around you, try Soundcurtain"
- Tech Digest, The 101 best iPhone apps in the world today

"Struggling to complete a project, but distracted and distressed by noise? SoundCurtain may be just the tool you need to banish distracting noise while focusing on the task at hand."
- MacWorld


Do you ever find it difficult working with background noise? You find listening to music interferes with your concentration?

Sound Curtain is a unique application that masks distracting noise by automatically adapting its volume, pitch and tone in response to the noise around you.

Comes with seven generative tracks - featuring intelligent, self-adjusting white noise and harmonic sounds that listen and react to your environment.

Sound Curtain: keeping the outside world where it belongs - outside.

(Powered by FutureAcoustic a3 / Requires headset with mic)


REVIEWS

- Forbes: http://bit.ly/soundcurtain7
- Tech Digest: http://bit.ly/soundcurtain6
- Gizmodo: http://bit.ly/soundcurtain5
- Macworld: http://bit.ly/soundcurtain4
- T3 podcast: http://bit.ly/soundcurtain3
- Pocket-lint: http://bit.ly/soundcurtain2
- iphonic: http://bit.ly/soundcurtain1


SOUNDCURTAIN TECHNOLOGY

SoundCurtain is an entirely new concept in sound control using advanced adaptive masking technology, powered by FutureAcoustic's adaptive acoustic architecture (a3) engine. It works better than Active Noise Cancellation or traditional (steady-state) masking for blocking-out fast-changing, informationally-rich noises, such as speech.

The technology monitors noise in your environment through your headset mic and performs real-time spectral analysis to calculate the energy content across a number of perceptually-important frequency bands. Sound is then generated in response, with its spectral content optimized to mask ambient noise. The sound is generated through a generative sound engine, using probabilistic rules to ensure that it is varied subtly over time, so that it doesn't become tiring.

You are able to customize the generated sound by changing its 'Sensitivity', which sets how quickly it adapts to sensed noise; its 'Min level', which sets the minimum playback level even when there's no noise around you; and the overall volume through the side buttons of you iPhone or iPod touch.

SoundCurtain ships with a set of sounds which are optimized for masking, while (critically) staying in the background of your perception - allowing you to concentrate or relax.

The 'Noise masker' is scientifically extremely accurate and is the most advanced masker that exists in any platform or device today. To test it, use the standard iPhone headset and set the headset volume to maximum; set 'Sensitivity' to maximum and 'Min Level' to the minimum setting; ask someone to talk to you - you should not be able to understand them. The generated sound should match exactly the spectrum of the sensed speech, without any discernible delay.

The other maskers use more emotive sounds and pleasant harmonics - they aim at increasing acoustic comfort in a noisy environment by partial masking, effectively transforming noise into soothing sound.

To learn more about the technology, visit www.futureacoustic.com
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SoundCurtain Screenshots


SoundCurtain Review

Ambient noise app banishes distracting noise to help you focus

Struggling to complete a project, but distracted and distressed by noise? There’s always the Fortress of Solitude, but that’s too far to go. The Cone of Silence never seemed to work that well. And who really has ready access to an isolated sound-proof booth?


Harmonic Convergence: SoundCurtain also provides visual feedback, with a distinctive waveform indicator that bounces, slides, and jumps in response to incoming noises.

SoundCurtain from FutureAcoustic, may be just the tool you need to banish distracting noise while focusing on the task at hand.

The $4 app distinguishes itself from similar applications by incorporating an “adaptive masking technology.” SoundCurtain listens to and analyzes sounds in the environment, responding with content specifically designed to mask ambient noise. Changes in sound—pitch, volume, duration, and the like—prompt the application to respond with its own changes in output to best mask the noise.

My tests of SoundCurtain generally supported the developer’s claims, although results varied based on the type of headphones in use, the specific noise masker selected within the app, and the type of noise being combatted. SoundCurtain was especially effective at eliminating noises containing limited structure and variability—for example, a 40-decibel coffee house buzz slipped easily into the background. The more structured noise from a nearby video game, while just as loud, brought a bit of a challenge to SoundCurtain.

The app provides adjustments to help address these issues. A sensitivity setting instructs the application in how quickly it should respond to a noise. A minimum noise level keeps the sound from fading away to nothing in a quiet location.

SoundCurtain’s other major variables include the masking noise used and the type of headphones you’re using. Three noises currently ship with the app, with FutureAcoustic promising more in future updates. The Noise masker is reminiscent of traditional white noise generators, while a Harmonic masker uses musical tones to battle extraneous sound. The Rain masker provides a grab bag of sounds—white noise, music, and rain—and was frequently the most effective at eliminating unwanted noise, although its own structure could be distracting.

For headphones, the standard iPhone headset/microphone kit worked well. The application uses the headset-embedded microphone to monitor ambient noise—if you plug in headphones lacking a microphone, monitoring switches to the built-in mic. For the hard-core, switching to passive noise reduction headphones—employing a earbud inserted within the ear canal—adds a physical seal against noise that effectively complemented the aural barrier provided by SoundCurtain.

SoundCurtain is compatible with any iPhone or second-generation iPod touch running the iPhone 2.2 software update.

[Dale Gardner is a freelance writer and aspiring photographer who lives in Northern Virginia.]

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