On Tue, Jan 7, 2025 at 08:05 PM, Ivano Pelicella wrote:
.... Unfortunately, I have personally found through experimental testing that datasheets often report completely invented data, especially in the ultrasonic range.?
I did wonder about that with the curves published on the Knowles app. notes I found for the SPU1410 (see here: )
The noise response follows the signal frequency response curve farily closely , so recording the noise from the mic (in as quiet an environment as I could find!) should produce a noise file that follows the same response curve. .... which it does!
So in this case it's possible to apply corrective EQ fairly acurately -- I prepared a script to do that in my DAW (Adobe Audition) and that allows for the recordings made on my Zoom F3 to have fairly accurate frequency resposne correction made up to around 75KHz.? Above that, the F3 frequency itself response tends to be a bit erratic!
I'm hoping the next generation of field recorders - using the 32 bit float file format - will enable the higher sampling rates available from the latest A/D converters to be enabled??
