Dear MARMAM, Recent work with a wavelet-based 'click detector' has advanced considerably-- so much so that I feel the results can now be shared with the general public. http://tinyurl.com/23slg8q These are detection spreadsheets that would be useful for anyone studying the sounds of Beaked whales -- and proficient with spreadsheet software, of course. As mentioned in an earlier post, 'echo flag' seems to be capable of marking whether a particular event is the original sound (values below approximately '1'), or a reflection (higher than '1'). If you are interested in snapshots of the detections themselves, images of the amplitude waveforms can be found in the associated '_jpegs' files [ compressed tar format ]. This project is starting with a couple of nice recordings of Blainville's Beaked whale, /Mesoplodon densirostris/, made in the Canary Isles and available on http://mobysound.org/. I am actively seeking other recordings for consideration. Minimum requirements at this time are 192000 samples per second and 16-bits per sample. Questions, comments, suggestions for additional fields in the spreadsheets are encouraged. Sincerely, Mark Fischer ~~~~~~~~~~~~~~~~~~~~~ http://aguasonic.com/