Running Title: Corrected high-speed anchored ultrasound

The CHAUSA (Corrected High-speed Anchored Ultrasound with Software Alignment) computer system architecture for collection of high-speed ultrasound (US) used in the investigation of speech articulation, integrates existing hardware and software components. A method for using this architecture for speech data processing is presented. The architecture and method increase the frame-rate for data analysis from the standard NTSC video rate (29.97) to the US internal machine rate, in this case 124 FPS, by using DICOM data transfer. CHAUSA data are presented with alignment of the acoustic and articulatory signals to the correct high-speed frame (8 ms at 124 FPS). The method controls and reduces head position uncertainty by using a combined head stabilization and head movement correction paradigm. Techniques that export the US video through the VGA or S-Video port introduce spatio-temporal inaccuracies that are avoided with CHAUSA. Preliminary US data of the production of one speaker’s alveolar click in IsiXhosa reveal tongue dorsum retraction during the posterior release, and tongue tip recoil following the anterior release. These effects were invisible at lower frame-rates. The CHAUSA architecture and method enable the study of dynamics of rapid lingual speech events as they unfold in time, with incremental resolutions of 8 ms.