ISO/TS 16976-4:2012 Respiratory protective devices - Human factors. Part 4: Work of breathing and breathing resistance: Physiologically based limits

First edition. ISO/TS 16976-4 was prepared by Technical Committee ISO/TC 94, Personal Safety — Protective clothing and equipment, Subcommittee SC 15, Respiratory protective devices. — 24 p.
This Technical Specification describes how to calculate the work performed by a person’s respiratory muscles with and without the external respiratory impediments that are imposed by RPD of all kinds, except diving equipment. This Technical Specification describes how much additional impediment people can tolerate and contains values that can be used to judge the acceptability of an RPD.