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By Andreas Raptopoulos

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"Best App for Creating Quiet Workspaces"
-, 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)


- Forbes:
- Tech Digest:
- Gizmodo:
- Macworld:
- T3 podcast:
- Pocket-lint:
- iphonic:


SoundCurtain is a new concept in sound control using "adaptive masking technology". It works better than Active Noise Cancellation or traditional (steady-state) masking for blocking-out fast-changing, information-rich noise, such as speech.

The app monitors noise in your environment through your headphones or device 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 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 'Minimum Volume', which sets the minimum playback level; and the overall volume through the side buttons of you iPhone, iPad, 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 the most accurate 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 'Minimum Volume' 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 presets use more emotive sounds and pleasant harmonics - they aim at increasing acoustic comfort in a noisy environment by partial masking, transforming noise into sound you control.

To learn more about the technology, visit

What's New in Version 1.5

- Background audio bug fix
- Updated UI for iOS 8
- Supports all modern iPhones
- Improved performance
- Stay tuned more on the way!

iPhone Screenshots

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Customer Reviews

Does what it says

This app listens to your background noise and then outputs some gentle white noise and a subtle remix of voices or specific noises in your environment. This helps keep the user from being distracted by conversations and voices since the remix of ambient sounds makes the voices sound more like babble, so that you can't focus on them intentionally or subconsciously. I use this app in addition to noise canceling headphones to keep nearby conversations from distracting me as much in my cubicle. Noise canceling apps & headphones don't cancel out human speech yet, so this is a great first step in the right direction.

Pretty but ineffective.

The lengthy marketing spiel in the description obfuscates what this app actually does. Simply put, it provides seven presets of base sound that increase in volume in response to sounds picked up by the microphone.

This doesn't provide silence, but trades external noise for headphone noise. There is a significant delay in responsiveness which isn't noticeable for constant sounds like the hum of conversation but very distracting for sound spikes, like a door closing.

I purchased it for use while reading in noisy environments, but I find that my older method of playing instrumental music is far more effective.

Glad for the update

I hadn't used the app in a while and had reason to reinstall it just a couple weeks ago. That's when I realized the last update was before even adapting to the iPhone 5 screen.

It still worked, which was impressive all things considered. It's great to see an update that covers all the modern devices.

View in iTunes
  • $4.99
  • Category: Productivity
  • Updated:
  • Version: 1.5
  • Size: 37.2 MB
  • Language: English
  • Seller:

Compatibility: Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.

Customer Ratings

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