EN ISO 10140-4 Acoustics - Laboratory Measurement of Sound Insulation of Building Elements - Part 4: Measurement Procedures and Requirements

The EN ISO 10140-4 standard published by the International Standards Organization (ISO) includes basic measurement procedures for air and impact sound insulation in laboratory conditions.

This standard, published under the general title of "Acoustics - Laboratory measurement of sound insulation of building elements", actually consists of the following sections:

• Part 1: Application rules for specific products
• Part 2: Measurement of sound insulation in air
• Part 3: Measurement of impact sound insulation
• Part 4: Measurement procedures and requirements
• Part 5: Requirements for test facilities and equipment

The purpose of the EN ISO 10140-4 standard is to describe the procedures for carrying out measurements of airborne sound insulation (part 2) and impact sound insulation (part 3), as well as explain all basic measurement techniques and processes according to plant characteristics (part 5). The detailed content of this standard is as follows:

• Definitions
• Frequency range
• microphone positions
• Sound pressure level measurements
• Averaging, space and time
• Fix for background noise
• Reverberation time measurements
• Loss factor measurements
• Low frequency measurements
• Sound power emitted by velocity measurement

Some expressions used in the application of the standard have the following meanings:

• The energy average sound pressure level in an environment is expressed in decibels.
• Reverberation time is the time it takes for the sound pressure level in a room to decrease by 60 dB after the sound source has stopped.
• Structural reverberation time is the time required for the acceleration level in a building to decrease by 60 dB after the sound source from the structure has stopped.
• Background noise level is the sound pressure level measured in the receiving room from all sources other than the loudspeaker or listening machine in the source room.

Sound insulation generally includes measures taken to reduce the negative effects of noise on human health. Noise is a collection of disturbing and unwanted sounds that are emitted irregularly and at different frequencies.

Our organization also provides laboratory measurement services of sound insulation of building elements within the scope of EN ISO 10140-4 standard, with its trained and expert staff and advanced technological equipment, among the numerous test, measurement, analysis and evaluation studies it provides for businesses in various sectors.