Research > Faculty Projects
Coherent Modulation Frequency Representation and Filtering
Principal Investigator
Les Atlas
Sponsor(s)
Air Force Office of Scientific Research (AFOSR)
Award Period
02/01/2006 - 11/30/2008
Abstract
Modulation frequency analysis offers the potential to
analyze and modify a signal’s dynamics. Building upon
decades of work by others, we have come up with new
principles for well-founded analysis and design of
modulation frequency systems. Moreover, recent
breakthroughs, which include our discovery that modulation
envelopes are usually complex, allows us to filter in
modulation with no added artifact and to meet powerfully
general superposition constraints. Our modulation
representations offer a close to complete foundation for a
new form of signal analysis and filtering. This new form of
filtering has applications in a wide variety of problems
including, for example, single-channel talker separation
and enhancement of noisy speech. Our proposed research has
three objectives: 1) to carefully define coherent
modulation spectra and modulation filters, 2) to
disseminate easy-to-use modulation spectral tools to other
scientists and 3) to work closely with other researchers to
investigate novel approaches to several open problems in
auditory science. These open problems include novel
explanations for auditory streaming effects, quantitative
models for informational masking, and modulation frequency
impact on auditory resolution and selectivity.
Updates or corrections to this page should be sent to gheaton@u.washington.edu.
