Acoustics. Reference zero for the calibration of audiometric equipment - Reference equivalent threshold sound pressure levels for pure tones and supra-aural earphones Ingestion-build-82061 it is recommended to use

it is recommended to use a test method to determine MN for the gas

BS EN 50625-2-1 also applies to all facilities including those whose treatment operations use mobile equipment

5 kPa when surcharged

Operational requirements – the need for “safe distance” – the need to be on “safe leash” at all times

BS EN 14033-2 covers standard references that help prevent track failure and derailment

Acoustics. Reference zero for the calibration of audiometric equipment - Reference equivalent threshold sound pressure levels for pure tones and supra-aural earphones Ingestion-build-82061 it is recommended to use1 Scope This document specifies a standard reference zero for the scale of hearing threshold level applicable to pure tone air conduction audiometers, to promote agreement and uniformity in the expression of hearing threshold level measurements throughout the world. It states the information in a form suitable for direct application to the calibration of audiometers, that is, in terms of the reference equivalent threshold sound pressure levels of