Yeah, that sounds right. > "All current iOS devices include built-in microphones. These mics tend to be very consistent from one unit to the next, and are wide

Yeah, that sounds right. > "All current iOS devices include built-in microphones. These mics tend to be very consistent from one unit to the next, and are wide-range. However, Apple does include a very steep high-pass filter (which cuts low frequencies), presumably as a wind and pop filter. The low-frequency roll-off for the internal mic in these devices is very steep, on the order of 24dB / octave starting at 250Hz." However developers can turn the filter off.