Great concept, but.... The delay in the phone is enough that it can be clearly distinguished between the source and the headphone output. In my case over 1 second of delay. There is no way, even with 359 degrees of phase adjustment that this app can cancel sound. It is not necessarily the app but the delay produced in the phones circuitry. This app will only work on a phone with no delay.
Good idea but doesn’t work Noise Canceller app: I would pay if the app works. It replays the conversation as an echo. It doesn't cancel. the background noise, as I hope for. The developer also mistakes phase shifting with delay adjustment. Adjusting the phase of the output does nothing to the delay. I hope he would let the app sample background noise, and allow delay, phase, and volume adjustment of thr output. I would like to use this to reduce driving noise in a car someday. Thanks.
I was hoping the bad reviews were wrong I wanted it to work but it does not. I hoped that people thought it didn't work cause it didn't cancel out sudden noises like voices or keyboards but it doesn't work for me to cancel out the constant noise of fans in my server room. It actually makes the problem worse. I tried slowly moving through different amplitudes and phase offsets but no luck. Its a shame but I expect it is partially the fault of the microphone. It isn't really designed to pick up background noise with enough clarity to do the trick.
HTC One Couldn't get it to work on my phone. However, the HTC One has a built-in noise canceling mic for in call use. On the back of the handset at the top right. The HTC One, LG G2, Galaxy S4 & S5 all use the Qualcomm Fluence technology specifically designed for this purpose. This app can really work and work well, it has the potential. Sadly, only with the right phone I think. To have a mobile noise canceling device would be awesome :). This can really work Haowen, and I will happily pay for it when it does :)
I wish it worked The big problem I found is that it was too slow inverting the sounds. All it really did was create a echo that was usually louder than the source. It might work on some constiant noises but the ones I tested (airplane, bus, fan, and a/c) it just made it worse. If the app could process the sounds as fast as the mic is picking them up it might work. There is also a clicking noise that starts from time to time. Thought it was from me tapping the screen at first but it happened other times too.
Beware Creates a high pitch sound sometimes while using the sliders which can startle you. Kudos to the developer for the idea. However does not work due to delays in sound processing - hardware / OS dependency.
Information about noise reduction after implementation of acoustic products.