Thanks for the reply. I will take the question to the porting group also. To clear the situation up a bit I'm using a external source for the signal and using the headset microphone input. So I'm quite sure that the problem is somewhere in the phone.
larlin On May 1, 8:53 pm, Bob Kerns <[email protected]> wrote: > 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 [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
