scope:

This document describes the aircraft industry recommendations for a headset with integral boom microphone suitable for pilot use in all types of aircraft using conventional radio installations. This document, ARINC Characteristic 535B, is in addition to and does not supersede the older ARINC Characteristic 535A: Lightweight Headset and Boom Microphone, dated March 3, 1972.

Microphones and headsets of many design variations are widely used by the pilot community with satisfactory performance. This document does not prescribe a particular design, nor does it imply that the standards outlined herein constitute the only characteristics of a satisfactory headset and microphone. Headset providers are encouraged to develop innovative products that meet and exceed customer expectations.

It is recognized that loudspeakers are widely used in modern flight decks. This ARINC Standard does not address the installation and use of loudspeakers.