It is the intention of these guidelines to provide a tool to increase the effectiveness and reliability of listening tests. The guidelines are also meant as a help in performing comparable listening tests. One of the essential items when performing listening tests is to distinguish between objective and subjective tests.
This matter is clarified in the guidelines. Since new concepts within acoustics are introduced, Section 4 Definitions and terms is rather comprehensive. For some topics in this guideline specific recommendations are given. For other topics the text has the character of a list of items for consideration because the relevant choices depend on the specific test situation.