Electroacoustics. Sound calibrators Ingestion-build-48183 the Standards within this suite

the Standards within this suite are interoperable and non-interfering

BS EN 61146-3 defines test patterns and measurement conditions so as to enable the comparison of the results of measurements

BS EN 50494 provides a purpose that is to introduce a complete system for distributing via a single coaxial cable signals issued from different bands and polarizations to several satellite receivers

It also covers the requirements for the connectors and stiffeners

Knowledge and understanding of the material evidence of built cultural heritage and the information on its current state is important as it helps to specify measures necessary to preserve structures in an appropriate condition and ensure that the maintenance required to keep them at this level is well defined

Electroacoustics. Sound calibrators Ingestion-build-48183 the Standards within this suite1 Scope This document specifies the performance requirements for three classes of sound calibrator: class LS (Laboratory Standard), class 1 and class 2. Acceptance limits are smallest for class LS and greatest for class 2 instruments. Class LS sound calibrators are normally used only in the laboratory; class 1 and class 2 are considered as sound calibrators for field use. A class 1 sound calibrator is primarily intended for use with a class 1 sound