08-25-2015, 09:46 AM
08-29-2015, 04:59 PM
There isn't. There is a spike at approximately the same place, but it's only a peak in the ultrasonic, because everything else is being filtered out. Also keep in mind that you may be getting environment al audio intermixing, since I don't have that spike on the masked.
![[Image: gj3u4ote.jpg]](http://fs1.directupload.net/images/150825/gj3u4ote.jpg)
![[Image: japksrno.jpg]](http://fs1.directupload.net/images/150825/japksrno.jpg)