WildSpectra Mobile is an adaptation of my desktop application by the same name, WildSpectra (a collaborative effort with Dr. R. Haven Wiley), to the Android operating system. It provides real-time scrolling audio spectrograms (sonograms) on handheld computing devices. It also provides waveform and spectrum views, as well as a level meter. Once a recording has been made and resides in memory, a number of post-processing operations can be performed and the resulting recording can be saved or images of the spectrogram can be saved for later use.
WildSpectra Mobile is provided in a lite and a pro version. The lite version is free but has a few limitations. The pro version is quite affordable and can be found on the Android Market in the Multimedia section.
Note that in order to install Android applications over the web instead of through the Market, you must tell your phone to trust such downloads. Developers do this all the time so they can test their own applications before uploading them to the Market. To do this, go into the main phone Settings and choose the Applications subsettings. On that page you must check the Unknown sources checkbox. You can always uncheck it after downloading and installing the .apk file.
Download WildSpectra Mobile v1.1 Lite (AndroidOS required)