So, iOS 6 has finally arrived and the biggest news for SoundMeter, SignalScope, and SignalScope Pro users may just be that the high-pass filter which used to plague the built-in microphone and headset microphone inputs now gets bypassed. This exciting improvement to iOS 6 will significantly improve the quality of acoustical measurements that can be made with the iPhone, iPad, or iPod touch, without requiring a dock connector accessory for audio input.
Below are 1/3-octave headset input frequency response comparisons for the various iOS devices that support iOS 6. More details regarding the headset input and built-in microphone will be presented in the days ahead.
Update (9/19/20120, 7:32 PM): It should be noted that these are electrical frequency response measurements. When making acoustical measurements, the overall frequency response will depend also on the microphone that is used.
iPhone 4S Before iOS 6/Now
iPhone 4 Before iOS 6/Now
iPhone 3GS Before iOS 6/Now
iPod touch 4 Before iOS 6/Now
iPad 3 Before iOS 6/Now
iPad 2 Before iOS 6/Now
iOS 6 is now highly recommended for all SoundMeter, SignalScope, and SignalScope Pro users.