Hello!
1. You should take the samples you suppose "to see" inside the sound file.
2. Compare this samples to the first block of sound data (get
Convolution coefficient or to get an
Euclidean distance).
3. Slide "comparative samples" through the "target samples" (where you would like to find the comparatives) and perform the same (as in item 2) operation.
In the result you will have a set of coefficients.
For the case of Euclidean distance the minimum value will show you the place "comparative samples" are located. To have an satisfactory results you should play with threshold value.
For the convolution the max value will tell you the location of the sound you are looking for.
Good luck!
Viktor Signaievskyi