TY - GEN AU - Barry A Bell AU - Arnold G Perrey AU - Marshall J Treado C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1990-01-01 05:01:00 DO - https://doi.org/10.6028/NIST.IR.90-4230 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1990 TI - Evaluation of hands-free communication systems: ER -