Strong modal behavior can produce undesirable acoustical effects, particularly in recording studios and other small rooms. Although closed-form solutions exist to predict modes in rectangular rooms with parallel walls, such solutions are typically not available for rooms with even modest geometrical complexity. This work explores a method to identify multiple decaying modes in experimentally me...

Near-field acoustical holography (NAH) is used to reconstruct three-dimensional acoustic fields from a two-dimensional planar measurement. During previous work at BYU, a method has been developed called energy based near-field acoustical holography which reduced the number of needed measurements by 75%. Other recent advances have expanded the theory to interior spaces where multiple sources and...

Guillaume Barbier, Pascal Perrier, Lucie Ménard, Mark Tiede, Joseph Perkell. Token-to-token variability and anticipatory coarticulation as indicators of maturity of speech motor control in 4-year-old children. 21st International Congress on Acoustics (ICA 2013) 165th Meeting of the Acoustical Society of America, Jun 2013, Montréal, Canada. Acoustical Society of America, Vol. 19, Paper 2aSC22, 2...

Computer simulations can be used to generate the spatial and temporal data describing the acoustical behavior of performance halls, but typically the analytical results are difficult to assimilate and compare. By using c o m p u t e r graphics to display the multi-dimensional data, substantially greater amounts of information than that conveyed by standard techniques can he communicated to the ...

This article presents a method of estimation of the vocal-tract cross-sectional area, considered as a function of time and position along the tract length. The estimation is based on the speech formant frequencies, and uses a priori information about natural tract con gurations. In general lines, the method is as follows: First, the cross-sectional area is represented by a two-dimensional Fouri...