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Technical Core

​​​​​​​The Technical Core, which is directed by Douglas Keefe Ph.D., has two main goals to support the research projects of investigators in the ​Center for Perception and Communication in Children (CPCC):

  • Provide laboratory computing and engineering support to individual projects by a staff skilled in real-time signal processing for experiments on hearing, ​speech perception and comprehension, language development, auditory-visual signal processing, and interactions of vestibular and visual function.
  • Develop an Auditory-Visual (AV) Core Facility for communications research in listeners with experimental control over spatial variability in auditory and visual stimuli.

The computer programmers and engineers (electrical, biomedical, media) in the Technical Core serve the needs of each project, and have the flexibility to support future projects from incoming junior researchers. The delivery of these services through a centralized core facility increases the efficiency of laboratory computing at lower overall cost to the budget. This allows both junior and senior investigators to utilize state-of-the-art computing and engineering staff in their individual projects.


Timothy Vallier, M.M. (Computer Music), Systems Analyst/Software Developer ​Timothy Vallier is a member of the CPCC Technical Core. He specializes in analyzing, designing, and implementing audio/visual information systems for grant supported research projects. As a software developer, Vallier creates tools and programs (Max, Python, C++, R) to display, record, and manipulate multimedia stimuli.

Auditory-Visual (AV) Core Facility

The Auditory-Visual (AV) Core Facility​ is ideal for research on spatial effects of auditory and visual sound sources on children’s speech perception and comprehension, with special emphasis on the listening needs in children with hearing loss. The AV Core Facility includes:

  • AV Booth: a large sound booth with precise experimental control over sound and visual stimuli
  • Control Room: equipped with computers, amplifiers ​and other peripherals with cabling into and out of the booth via two holes in the front wall of the booth (the holes include conductive fill material).
  • Waiting Room for the parents/guardians and other family ​members of children participating as human subjects. This waiting room is used for consent procedures with the human subject and fa​mily, and is used for technical meetings by hospital personnel during other times.
  • Office space for core personnel​