Hello,

We need a very simple iPhone app.
The app will have one previously stored sound file (wav file, for instance). That file will have a length of about 1, 2 or 3 seconds.

The app has to continuously listen what is received from the microphone and show in the screen a number indicating the "similarity" of what is hearing with the previously stored sound file, in a scale from 0% to 100%.
In case it is very close to what is prerecorded, the screen will show a high number ("86%" for instance). If it does not have similarity, it will show "0%".

We are not searching for exactness but approximation in different grades.

The developer does not have to worry about the graphics and the interface design. We understand that this has to be developed by someone that understands sound waves and how to sample them.

The code has to be of good quality and not use APIs not approved by Apple.More specifications:

The prerecorded sound file be very short (1 or 2 seconds max) because it will have only one or two words maximum. For example: "Twenty-two".

As soon as the app is launched, the mic is turn on. The app will only show a percentage in the screen, indicating the similarity of what is hearing with the prerecorded sound file.

If, for instance, someone says "Twenty-two", the app should display a high degree of similarity (50%-100%).
We don't mind if the app gives some false positives, as long as it is not a high ratio.

We need something that works on an iPhone and iPod touch, so I understand that the comparison should be light enough to allow the iPhone CPU to do the work.

File format of your choice (wav, mp3, ogg, avi, ...).
No additional feature needed.