Acoustics. Measurements on silencers in situ1 Scope 1. 1 This International Standard specifies measurements on silencers in situ. It is applicable to measurements on silencers in practical applications for acoustic analysis, acceptance tests and similar evaluations. Results obtained in accordance with this International Standard cannot be compared to performance data obtained from laboratory measurements on ducted silencers in accordance with ISO 7235, partly because of different test

2 - Particle size distribution in aggregates by gravimetric method

Method B is applicable to twistless combed slivers and prepared rovings of a type used in the woollen and worsted systems

BS 4434 gives explanatory notes on refrigerant compressor lubricants and is for information only

• Reference model for quality metrics

This standard is applicable to resins of the following types:

for fixed installations

This International Standard specifies a method for determining the resistance to external blows of thermoplastic pipes of circular Cross-section

BS 2838-2 also does not apply to couches for use in conditions of high humidity and high temperatures such as Turkish baths and swimming pools

• Provide a comprehensive evaluation of all possible factors that could affect the performance of these systems

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