When headphones that include a microphone are in use, the internal microphone on the iPhone or iPad is disabled. The microphones in headphones are designed to amplify voice and reduce background sounds (such as birds). This can affect your recordings and the species ID process negatively.
Wildlife Acoustics, Inc.
3 Mill and Main Place, Suite 210
Maynard, MA 01754-2657 USA
+1 (978) 369-5225
+1 (888) 733-0200