IEC/TS 61994-2:2011 is a technical specification that gives the terms and definitions for piezoelectric and dielectric filters representing the present state of the art, which are intended for use in the standards and documents of IEC technical committee 49. The main changes with respect to the previous edition are listed below:
- definitions updated,
- terminology given in orderly sequence,
- new terminologies are added,
- drawings inserted for easier understanding.