Acoustics. Statistical distribution of hearing thresholds of otologically normal persons in the age range from 18 years to 25 years under free-field listening conditions1 Scope This International Standard provides descriptive statistics, percentiles, of the hearing threshold distribution whose mean is the reference threshold value specified in ISO 226 and ISO 389 7. The mean and percentile thresholds are specified under the following conditions: a) the sound field in the absence of the listener consists of a free progressive plane wave (free field); b) the sound source is directly in front of the listener (frontal

Validation labels and certificates

Testing agencies involved in the inspection of swivel nuts

— the standard effective lengths

The guidance given in ISO 3740 applies to airborne sound

BS 7666-1 is the first part of an international multi-series standard that covers spatial datasets for geographical referencing

called pits

the following are also included in the scope of BS EN 55014-2:

BS EN 60512-4-1

Council Recommendation 1999/519/EC and other national and international guidelines or requirements with regard to human exposure from EMF

BS EN 2641 also assists you with the appropriate material and surface treatment

4 Permissible manual operating forces

ISO 18091 gives guidelines for local government bodies to understand and implement a quality management system that meets the ISO 9001:2015 requirements