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The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Hi Edgar, It would be interesting to compare the spectra with the time- and frequency reassigned spectrogram. It is implemented in Spectrum Lab but needs a bit of tweeking (especially the FFT length). Details and a screenshot comparing the normal and reassigned spectrogram: [...] Content analysis details: (-1.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [195.4.92.92 listed in list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (dl4yhf[at]freenet.de) -1.0 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain X-Scan-Signature: 4e3b1488273adbbe9757d6bdd5adf219 Subject: Re: LF: An experiment Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false Hi Edgar, It would be interesting to compare the spectra with the time- and frequency reassigned spectrogram. It is implemented in Spectrum Lab but needs a bit of tweeking (especially the FFT length). Details and a screenshot comparing the normal and reassigned spectrogram: http://www.qsl.net/dl4yhf/speclab/ra_spectrogram.htm The algorithm itself is described at http://people.ece.cornell.edu/land/PROJECTS/ReassignFFT/index.html If you like, you can send me one of your wave recordings to experiment with... All the best, Wolf . Am 16.06.2014 04:19, schrieb edgar: > Hi, > > The attached file contains the results of an experiment in recording > signals of short duration. > > Comments welcomed. > > Regards, Edgar > Moonah, Tasmania.