Hi all -- just a caveat that I have zero experience with radio communications, but I haven't come across anywhere else with people likely to have the expertise for this question.
I'm a birder with audio production experience. I recently got an outdoor recording device to record bird calls at dawn. I just tested it out for the first time, and when I opened the recording in Adobe Audition, in addition to bird calls I noticed fast repeating tones at 26 kHz. By fast repeating I mean two instances of a .01 sec tone about .02 secs apart, with each pair repeating about .014 seconds apart. This pattern was present for all three hours I recorded. I've attached a screen capture of how it looks in Audition; I added arrows because the tones are so faint...they might not be visible on small screens.
I'm just wondering if anyone might have a guess as to what the tones are. This is a suburban environment, all single-family homes. I haven't found any documentation that the device itself makes this tone, but if it's relevant, the device uses three AA batteries and writes to a mini SD card.
From what I gather from reading through RadioReference, something in the 26 kHz range may not be relevant to what y'all work with. But I'm so curious I thought I'd ask anyway. Thanks in advance.
I'm a birder with audio production experience. I recently got an outdoor recording device to record bird calls at dawn. I just tested it out for the first time, and when I opened the recording in Adobe Audition, in addition to bird calls I noticed fast repeating tones at 26 kHz. By fast repeating I mean two instances of a .01 sec tone about .02 secs apart, with each pair repeating about .014 seconds apart. This pattern was present for all three hours I recorded. I've attached a screen capture of how it looks in Audition; I added arrows because the tones are so faint...they might not be visible on small screens.
I'm just wondering if anyone might have a guess as to what the tones are. This is a suburban environment, all single-family homes. I haven't found any documentation that the device itself makes this tone, but if it's relevant, the device uses three AA batteries and writes to a mini SD card.
From what I gather from reading through RadioReference, something in the 26 kHz range may not be relevant to what y'all work with. But I'm so curious I thought I'd ask anyway. Thanks in advance.
