ISO 16283-2:2020
Acoustics — Field measurement of sound insulation in buildings and of building elements — Part 2: Impact sound insulation
This document specifies procedures to determine the impact sound insulation using sound pressure measurements with an impact source operating on a floor or stairs in a building. These procedures are intended for room volumes in the range from 10 m3 to 250 m3 in the frequency range from 50 Hz to 5 000 Hz. The test results can be used to quantify, assess and compare the impact sound insulation in unfurnished or furnished rooms where the sound field may or may not approximate to a diffuse field.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Instrumentation
4.1 General
4.2 Calibration
4.3 Verification
5 Frequency range
5.1 Tapping machine as the impact source
5.2 Rubber ball as the impact source
6 General
7 Default procedure for sound pressure level measurement
7.1 General
7.2 Generation of sound field
7.2.1 General
7.2.2 Impact source positions for the tapping machine as impact source
7.2.3 Impact source positions for the rubber ball as impact source
7.3 Fixed microphone positions for the tapping machine or rubber ball as impact source
7.3.1 General
7.3.2 Number of measurements
7.3.3 Tapping machine operated at more than one position
7.3.4 Rubber ball operated at more than one position
7.4 Mechanized continuously moving microphone for the tapping machine as impact source
7.4.1 General
7.4.2 Number of measurements
7.4.3 Tapping machine operated at more than one position
7.5 Manually scanned microphone for the tapping machine as impact source
7.5.1 General
7.5.2 Number of measurements
7.5.3 Tapping machine operated at more than one position
7.5.4 Circle
7.5.5 Helix
7.5.6 Cylindrical-type
7.5.7 Three semicircles
7.6 Minimum distances for microphone positions
7.7 Averaging times for the tapping machine as impact source
7.7.1 Fixed microphone positions
7.7.2 Mechanized continuously moving microphone
7.7.3 Manually scanned microphone
7.8 Calculation of energy-average sound pressure levels
7.8.1 Fixed microphone positions for the tapping machine as impact source
7.8.2 Mechanized continuously moving microphone and manually scanned microphone for the tapping machine as impact source
7.8.3 Fixed microphone positions for the rubber ball as impact source
8 Low-frequency procedure for sound pressure level measurement for the tapping machine as impact source
8.1 General
8.2 Generation of sound field
8.2.1 General
8.2.2 Impact source positions
8.3 Microphone positions
8.4 Averaging time
8.5 Calculation of low-frequency energy-average impact sound pressure levels
9 Background noise (default and low-frequency procedure)
9.1 General
9.2 Correction to the signal level for background noise
10 Reverberation time in the receiving room (default and low-frequency procedure)
10.1 General
10.2 Generation of sound field
10.3 Default procedure
10.4 Low-frequency procedure
10.5 Interrupted noise method
10.6 Integrated impulse response method
11 Conversion to octave bands
12 Expression of results
13 Uncertainty
14 Test report
Annex A (normative) Impact sources
Annex B (normative) Requirements for loudspeakers used for reverberation time measurements
Annex C (informative) Forms for the expression of results
Annex D (informative) Additional guidance
Annex E (informative) Horizontal measurements — Examples of suitable impact source and microphone positions
Annex F (informative) Vertical measurements — Examples of suitable impact source and microphone positions
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Instrumentation
4.1 General
4.2 Calibration
4.3 Verification
5 Frequency range
5.1 Tapping machine as the impact source
5.2 Rubber ball as the impact source
6 General
7 Default procedure for sound pressure level measurement
7.1 General
7.2 Generation of sound field
7.2.1 General
7.2.2 Impact source positions for the tapping machine as impact source
7.2.3 Impact source positions for the rubber ball as impact source
7.3 Fixed microphone positions for the tapping machine or rubber ball as impact source
7.3.1 General
7.3.2 Number of measurements
7.3.3 Tapping machine operated at more than one position
7.3.4 Rubber ball operated at more than one position
7.4 Mechanized continuously moving microphone for the tapping machine as impact source
7.4.1 General
7.4.2 Number of measurements
7.4.3 Tapping machine operated at more than one position
7.5 Manually scanned microphone for the tapping machine as impact source
7.5.1 General
7.5.2 Number of measurements
7.5.3 Tapping machine operated at more than one position
7.5.4 Circle
7.5.5 Helix
7.5.6 Cylindrical-type
7.5.7 Three semicircles
7.6 Minimum distances for microphone positions
7.7 Averaging times for the tapping machine as impact source
7.7.1 Fixed microphone positions
7.7.2 Mechanized continuously moving microphone
7.7.3 Manually scanned microphone
7.8 Calculation of energy-average sound pressure levels
7.8.1 Fixed microphone positions for the tapping machine as impact source
7.8.2 Mechanized continuously moving microphone and manually scanned microphone for the tapping machine as impact source
7.8.3 Fixed microphone positions for the rubber ball as impact source
8 Low-frequency procedure for sound pressure level measurement for the tapping machine as impact source
8.1 General
8.2 Generation of sound field
8.2.1 General
8.2.2 Impact source positions
8.3 Microphone positions
8.4 Averaging time
8.5 Calculation of low-frequency energy-average impact sound pressure levels
9 Background noise (default and low-frequency procedure)
9.1 General
9.2 Correction to the signal level for background noise
10 Reverberation time in the receiving room (default and low-frequency procedure)
10.1 General
10.2 Generation of sound field
10.3 Default procedure
10.4 Low-frequency procedure
10.5 Interrupted noise method
10.6 Integrated impulse response method
11 Conversion to octave bands
12 Expression of results
13 Uncertainty
14 Test report
Annex A (normative) Impact sources
Annex B (normative) Requirements for loudspeakers used for reverberation time measurements
Annex C (informative) Forms for the expression of results
Annex D (informative) Additional guidance
Annex E (informative) Horizontal measurements — Examples of suitable impact source and microphone positions
Annex F (informative) Vertical measurements — Examples of suitable impact source and microphone positions
Bibliography