Standard Specification for Copper Alloy Permanent Mold Castings for General Applications Ingestion-build-81111 you can enhance the condenser

you can enhance the condenser microphone’s effectiveness and efficacy and manufacture a standardized product

It provides concise

This European Standard is applicable to hand fuelled intermittent burning slow heat release appliances having thermal storage capacity such that they can provide heat for a declared period of time after the fire has gone out

there is some overlap

the test methods mentioned in BS EN 990 can be used to examine the fundamental suitability of a corrosion protection system in combination with a defined manufacturing process for the production of reinforced components

Standard Specification for Copper Alloy Permanent Mold Castings for General Applications Ingestion-build-81111 you can enhance the condenser