EUROCAE ED-18 PDF

INTRODUCTION

The task assignment included the consideration of the overall system audio response characteristics affecting the intelligibility of air-ground speech communication, and the review and evaluation, to the extent feasible, of all design measures giving promise of improvement. While the assignment specifically applied to characteristics, it became evident, as the problems were reviewed, that environmental conditions and practices of communicators create not only a need for improvements in the system, but seriously limit improvements attainable by design changes alone. Other limitations are imposed by regulatory agencies and international agreements. In view of this, it was considered important, in the interest of aviation, to emphasize these related aspects in this Document and to point out that control of environmental conditions and user practices require action by other than communication equipment designers.