Noise Canceller

Noise Canceller


1.0.2: Fix more FC bugs.
As the name suggest, this app will try to lower the environment noise by generating a phase-inverted wave of the noise. Due to a delay of sampling and playing(no realtime sound api in android), user will need to change the phase and amplitude manually to get the best effect.
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Free
30
1.5
User ratings
509
Installs
50,000+
Concerns
0
File size
31 kb
Screenshots
Screenshot of Noise Canceller Screenshot of Noise Canceller
About Noise Canceller
1.0.2: Fix more FC bugs.
As the name suggest, this app will try to lower the environment noise by generating a phase-inverted wave of the noise. Due to a delay of sampling and playing(no realtime sound api in android), user will need to change the phase and amplitude manually to get the best effect.

User reviews of Noise Canceller
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Android Market Comments
A Google User
Mar 26, 2015
Interesting concept It just doesnt work. I like the concept but the execution needs some work.
A Google User
Mar 16, 2015
WIll never work on most phones Good in principle, but sadly no application will work as intended in this regard due to the inherent latency within Android. Poor drivers, Poor OS, poor hardware all conspire to make what would otherwise need to be a real time operation, impossible to pull off successfully. To invert and correctly phase sound received by a microphone requires a dedicated hardware component (as of today's technology) to successfully be fast enough to invert the audio wave and play back via ear phones. Additional processing will be required to dull the secondary harmonics induced into your actual microphone by way of transmission though the wires / ear phone casing. Only a calibrated system working together can truly be effective, where the phone is able to read feedback from the earphone diaphragm, account for the introduction of associated harmonics then apply to the sum of the inverted external noise source. Alas, this requires dedicated hardware to be truly effective. If there were a phone and drivers optimized sufficiently to realise near zero phase between the source and the produced sound wave at the ear drum of the listener, perhaps your looking at a 3dB reduction at most.
A Google User
Feb 20, 2015
Does not work
A Google User
Feb 13, 2015
Sampling output is too slow Noise-cancelling needs to be timely. If it is slow, it can't cancel out sound waves, so what's the point?
A Google User
Feb 6, 2015
il ritardo è eccessivo inutile
Version 1000000
Version 1000000