ISO/TS 16976-6:2014 provides information on the psycho-physiological effects related to the wearing of respiratory protective devices (RPD) and it is intended for the preparation of standards for selection and use of RPD.
It specifies for the writers of RPD standards, principles relating to

the interaction between RPD and the human physiological and psychological perception,
the acceptance by the wearer, and
the need for training to improve acceptance of the RPD by the wearer.

ISO/TS 16976-6:2014 does not cover requirements related to the specific hazard for which the RPD is designed.