BS EN ISO 5577:2017

What is ISO 5577 on Ultrasonic testing about?  

ISO 5577 is an international standard that covers vocabulary for non-destructive testing.   
ISO 5577 defines the terms used in ultrasonic non-destructive testing and forms a common basis for standards and general use.   
ISO 5577 specifies technicalities like terms related to frequencies, waves, and pulses, terms related to sound, terms related to test equipment, and ultrasonic testing.  
Note 1: ISO 5577 does not cover terms used in ultrasonic testing w...