While these are good and interesting questions, this isn't a good group to ask them in, as this is at a lower level than the SDK.
This is so close to the hardware I think the porting group would be more likely to be able to assist. BTW, noise suppression isn't the same thing as a high-pass filter. Very different, in fact. It would not surprise me if it were the microphone itself that has the low-frequency rolloff. Even a microphone such as the Shure SM57 will roll off below 150 Hz -- just to pick one example I googled up for you. This is often considered a good thing, depending on the application. Low frequencies involve large excursions, which in turn lead to clipping or other distortion. So this may not be under control of the software at all. In any event -- you should expect a lot of variation between devices in this frequency range. If you're trying to make a high-quality SPL meter, I'd suggest specifying the use of an external microphone of known characteristics. -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
