Douglas Cross

Retired Associate Professor, Speech Language Pathology and Audiology


Description: The Speech Physiology and Acoustics Lab provides access to observation, measurement, and manipulation of speech production and perception proocesses. Measurement capabilities include electroencephalography (EEG), evoked potentials (EPs), electromyography (EMG), kinematics of the lip and jaw movement, respiration, and acoustic features of normal and disordered communication. The lab is open to faculty and students for a wide variety of teaching, research, and clinical assessment/intervention projects.   

Instrumentation: The lab is centered on a Mac G5 computer and an external instruNet Data Aquisition input-output converter and internal PCI bus controller card. Instrumentation is available for a variety of neurophysiological measurements including electroencephalography (EEG), evoked potentials (EPs), and electromyography (EMG). Analysis of vocal fold behavior (EGG) is accomoplished via an EG2-PC Electroglottograph with lip and jaw movement via a custom build head mount strain-gauge system. A Respitrace is usesd to assess respiratory behaviors. High quality analog and digital audio recording is available for input and analysis via a Sure studio microphone (model SM7B), six-channel audio mixer, and a Delta 66 sound card.   

Software: The GW Instruments SupereScope II and SoundScope software provide for data aquistion, display, and analysis . SuperScope II is a laboratory instrumentation design environment that can be used to build virtually any software laboratory instrument. It can digitize, analyze, display, calculate, graph and database waveform data. SoundScope is a speech and sound analysis software program that can record sound, perform extensive acoustic analysis, extract key values, and compute statistics on virtually any audio data set. Sound display capabilities are extensive and flexible including basic waveforms, spectrographics, two and three dimensional spectrums, Fo, intensity, etc.