DESIGN OF A HUMAN HEAD SIMULATOR (HHS) FOR STUDYING THE SPEECH TRANSMISSION CHRACTERISTICS OF PROTECTIVE MASKS AND TRANSDUCER SYSTEMS

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Authors
  1. Racansky, D.
  2. Kunov, H.
Corporate Authors
Defence and Civil Inst of Environmental Medicine, Downsview ONT (CAN);Toronto Univ, Toronto ONT (CAN) Inst of Biomedical Engineering
Abstract
The Human Head Simulator (HHS) was developed under contract with the Defence and Civil Institute of Environmental Medicine. The HHS was designed for studying the speech transmisison properties of respiratory protective devices and transducer systems, but will find applications in other fields where accurate mechanical and acoustic models of the head and face are important. The HHS consists of three major parts: an anthropometrically correct headform, a breath simulation system and a voice simulation system. The headform representing a North American male adult Caucasian was designed with a three-dimensional CAD package. It is composed of a hollow hard structure covered with artificial skin simulating the mechanical properties of human skin. The headform has the correct dynamic mass and a compliant neck. It is mounted on a commercially available torso (KEMAR). The removable back of the headform allows access to mounting surfaces around the mouth and nasal openings. A microphone is positioned with its tip between the lips of the mouth opening. The breath simulation system consisting of a programmable, electronically controlled pump was designed to cover the whole range of airflows and airflow patterns associated with respiratory activity of humans under different conditions: resting, exercise, speaking and their combinations. TRUNCATED
Keywords
Waveform generators;Speech representation
Date of publication
01 May 1990
Number of Pages
274
DSTKIM No
97-00609
CANDIS No
500892
Format(s):
Hardcopy;Document Image stored on Optical Disk

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