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  • DD4WH's Avatar
    07-15-2019, 05:56 AM
    As far as I can see, there is no need for such a large (and processor-intense) FFT. Of course the T4 could help you, but I am pretty sure that by reducing the load you can do that on a T3.6 Your visualization only...
    35 replies | 9331 view(s)
  • DD4WH's Avatar
    07-08-2019, 08:42 AM
    Hi gohlhausen, thanks for your work! Did you test, how your FFT performs if applied to audio? In my experience, when used for convolution (FFT --> complex-multiply with filter mask --> inverse FFT), the fixed...
    35 replies | 9331 view(s)
  • DD4WH's Avatar
    06-25-2019, 03:48 PM
    We now use a total of 12 microSoundRecorders for recording nocturnal Crex crex (corn crake). Thank you again, Walter, for providing us with this Teensy 3.6 recording tool with your software! Our hardware setup now...
    126 replies | 12056 view(s)
  • DD4WH's Avatar
    06-22-2019, 09:18 AM
    DD4WH replied to a thread Bat detector in Audio Projects
    deleted due to browser error.
    347 replies | 28817 view(s)
  • DD4WH's Avatar
    06-22-2019, 09:16 AM
    DD4WH replied to a thread Bat detector in Audio Projects
    Hi Edwin, what an impressive amount of microphones!!! Looks like a lot of soldering fun ;-). This is wrong for single ended mode and is not stated in the datasheet, that is what my posts in the last days were...
    347 replies | 28817 view(s)
  • DD4WH's Avatar
    06-21-2019, 01:36 PM
    DD4WH replied to a thread Bat detector in Audio Projects
    Hi Edwin, I feel that there are several people having problems to understand how to use the ICS40730 in single ended mode for maximum performance ;-). Here is the <magic> with that MIC: GND --> connect to GND...
    347 replies | 28817 view(s)
  • DD4WH's Avatar
    06-19-2019, 12:14 PM
    DD4WH replied to a thread Bat detector in Audio Projects
    I initially thought you were looking for people reporting about their experience with the ICS40730. Thats what I did. I can highly recommend the ICS40730 which has proved to be of excellent performance in our...
    347 replies | 28817 view(s)
  • DD4WH's Avatar
    06-19-2019, 07:32 AM
    DD4WH replied to a thread Bat detector in Audio Projects
    Well, that is odd. How would you explain that we use the ICS40730 in many devices with great sucess and in your setup the output is not clean? I am not sure what you mean with two outputs? The ICS 40730 has only...
    347 replies | 28817 view(s)
  • DD4WH's Avatar
    06-18-2019, 09:35 PM
    DD4WH replied to a thread Bat detector in Audio Projects
    Hi Remis, we use the ICS40730 as a standard ultrasound microphone for our semiprofessional bat recorders (in single ended mode !): * it has a sensational frequency response up to 160kHz * it has the highest SNR I...
    347 replies | 28817 view(s)
  • DD4WH's Avatar
    06-18-2019, 07:23 AM
    Hi Holger, give this a try also, its a very nice filter designer and also plots the response and gives you the coefficients. Also helpful is the possibility to test the filters with different accuracies of your...
    7 replies | 403 view(s)
  • DD4WH's Avatar
    06-02-2019, 09:38 AM
    Hi Valery, 1.) sample rate: yes, that is already implemented in the newest version of the software! 2.) yes, that is also possible, but you would have to alter the function setfreq according to your specific...
    204 replies | 51380 view(s)
  • DD4WH's Avatar
    06-02-2019, 09:29 AM
    Hi Frank, I have no experience with PIN diode switching, but they are said to have low resistance against IM3, which means that high signal levels can seriously distort your reception. Could be that you can improve...
    204 replies | 51380 view(s)
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About DD4WH

Basic Information

About DD4WH
Location:
Central Europe
Interests:
Software Defined Radio, Digital Signal Processing, Bat detection & bioacoustics

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Last Post
Audio Library and 4096 point FFT on Teensy 3.6 07-15-2019 05:56 AM
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07-15-2019 12:04 PM
Join Date
10-25-2015