Available from here
Each zip file contains 25 files:
The files are available in zip files, one for each of the 10 sites. Each file is approximately 500 MB.
The recordings were compressed from the original files (wav, mono, 16-bit, 44.1 kHz) to the lossless format FLAC. All recording were made with a Sennheiser ME-62 omni-directional microphone and K-6 module and a Marantz PMD-670 digital recorder. The file name indicates the date and time when the recording was made.
For more information on the FLAC format, see the FLAC homepage.
Please consult the Materials and Methods section of the paper for details on how the recordings were made and analyzed.
This data can be used for educational and research purposes. I'll appreciate if you let me know when and how you use this data.
Any commercial use is prohibited without the written authorization of the authors.

The recordings are released under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 License licence by the authors.
Miguel A. Acevedo and Luis J. Villanueva-Rivera
2006
ljvillanueva@coquipr.com