Welcome!  This site will some day contain descriptions of my research and contain many examples of acoustic demos I have made and code that I have written.   But right now there is much work left to be done.  In the meantime, you can find my past publications, codes and my résumé at www.jamestraervi.com but please note that this is somewhat dated:  I no longer work in San Diego and I am no longer an oceanographer studying acoustic reverberation and noise in the ocean.

I am now a post-doc working in the McDermott Computational Audition Lab in the Brain and Cognitive Sciences Department at MIT studying acoustic reverberation and noise in the spaces in which humans live.  I am developing a technique to measure the reverberant impulse response (IR) of real-world spaces using low-cost apparatus and low-volume sources that allow me to make measurements outdoors and in crowded public spaces.  With this I am building a database of acoustic IR recordings from which I hope to estimate the features and statistics of the most commonly encountered IRs.

From my preliminary measurements I have developed a model of real-world reverberant filters that includes the diffuse tail of late-arriving reflections.  I am conducting perceptual experiments to determine how the parameters and statistics of the diffuse reflections affect speech comprehension and the auditory perception of “reverb”.  From these, and my real-world measurements, I hope to infer what prior assumptions the human auditory system makes about reverberation, and how it is that human listeners are so remarkably robust to significant acoustic distortion.

I am applying these insights to the development of computational dereverberation algorithms with application to automated speech recognition, telecommunications and improved design of hearing aids.  Watch this space for more info....