AS/NZS IEC 61672.2:2019
Electroacoustics - Sound level meters - Part 2: Pattern evaluation tests
Provides details of the tests necessary to verify conformance to all mandatory specifications given in IEC 61672.1 for time-weighting sound level meters, integrating-averaging sound level meters, and integrating sound level meters. Pattern evaluation tests apply for each channel of a multi-channel sound level meter, as necessary. Tests and test methods are applicable to class 1 and class 2 sound level meters. The aim is to ensure that all laboratories use consistent methods to perform pattern evaluation tests. Identical with and reproduced from IEC 61672-2:2013 Ed 2.1.
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AS/NZS IEC 61672.2:2019 Sound level meters Pattern evaluation tests
CONTENTS
FOREWORD
1 Scope
2 Normative references
3 Terms and definitions
4 Submission for testing
5 Marking of the sound level meter and information in the Instruction Manual
6 Mandatory facilities and general requirements
7 Environmental, electrostatic, and radio-frequency tests
7.1 General
7.2 Uncertainties for measurements of environmental test conditions
7.3 Influence of static pressure
7.4 Limits on air temperature, relative humidity and static pressure
7.5 Acclimatization requirements for tests of the influence of air temperature and relative humidity
7.6 Abbreviated test of the combined influence of air temperature and relative humidity
7.7 Influence of air temperature
7.8 Influence of relative humidity
7.9 Influence of electrostatic discharges
7.10 Influence of a.c. power-frequency and radio-frequency fields
7.10.1 Sound signal
7.10.2 AC power-frequency tests
7.10.3 Radio-frequency tests
8 Radio-frequency emissions and public power supply disturbances
9 Electroacoustical performance tests
9.1 General
9.2 Indication at the calibration check frequency
9.3 Directional response
9.4 Tests of frequency weightings with acoustical signals
9.4.1 General
9.4.2 Windscreen corrections
9.4.3 Free-field tests
9.4.4 Comparison coupler tests
9.4.5 Conformance
9.4.6 Random incidence
9.5 Tests of frequency weightings with electrical signals
9.5.1 General
9.5.2 First alternative test procedure (variable input signal level)
9.5.3 Second alternative test procedure (constant input signal level)
9.5.4 Conformance
9.5.5 Frequency weightings C or Z at 1 kHz
9.6 Corrections for the effect of reflections from the case of a sound level meter and diffraction around a microphone
9.7 Corrections to obtain free-field or random-incidence sound levels
9.8 Level linearity
9.8.1 Tests at an air temperature near the reference air temperature
9.8.2 Tests at elevated air temperature
9.9 Under-range indication
9.10 Self-generated noise level
9.11 Decay time constants for time weightings F and S
9.12 Toneburst response for sound level meters that measure time-weighted sound level
9.13 Toneburst response for sound level meters that measure sound exposure level or time-averaged sound level
9.14 Response to sequences of repeated tonebursts for sound level meters that measure time-averaged sound level
9.15 Overload indication
9.16 C-weighted peak sound level
9.17 Reset
9.18 Electrical output
9.19 Timing facilities
9.20 Crosstalk in multi-channel sound level meter systems
9.21 Power supply
10 Pattern evaluation report
Bibliography
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AS/NZS IEC 61672.2:2019 Sound level meters Pattern evaluation tests
CONTENTS
FOREWORD
1 Scope
2 Normative references
3 Terms and definitions
4 Submission for testing
5 Marking of the sound level meter and information in the Instruction Manual
6 Mandatory facilities and general requirements
7 Environmental, electrostatic, and radio-frequency tests
7.1 General
7.2 Uncertainties for measurements of environmental test conditions
7.3 Influence of static pressure
7.4 Limits on air temperature, relative humidity and static pressure
7.5 Acclimatization requirements for tests of the influence of air temperature and relative humidity
7.6 Abbreviated test of the combined influence of air temperature and relative humidity
7.7 Influence of air temperature
7.8 Influence of relative humidity
7.9 Influence of electrostatic discharges
7.10 Influence of a.c. power-frequency and radio-frequency fields
7.10.1 Sound signal
7.10.2 AC power-frequency tests
7.10.3 Radio-frequency tests
8 Radio-frequency emissions and public power supply disturbances
9 Electroacoustical performance tests
9.1 General
9.2 Indication at the calibration check frequency
9.3 Directional response
9.4 Tests of frequency weightings with acoustical signals
9.4.1 General
9.4.2 Windscreen corrections
9.4.3 Free-field tests
9.4.4 Comparison coupler tests
9.4.5 Conformance
9.4.6 Random incidence
9.5 Tests of frequency weightings with electrical signals
9.5.1 General
9.5.2 First alternative test procedure (variable input signal level)
9.5.3 Second alternative test procedure (constant input signal level)
9.5.4 Conformance
9.5.5 Frequency weightings C or Z at 1 kHz
9.6 Corrections for the effect of reflections from the case of a sound level meter and diffraction around a microphone
9.7 Corrections to obtain free-field or random-incidence sound levels
9.8 Level linearity
9.8.1 Tests at an air temperature near the reference air temperature
9.8.2 Tests at elevated air temperature
9.9 Under-range indication
9.10 Self-generated noise level
9.11 Decay time constants for time weightings F and S
9.12 Toneburst response for sound level meters that measure time-weighted sound level
9.13 Toneburst response for sound level meters that measure sound exposure level or time-averaged sound level
9.14 Response to sequences of repeated tonebursts for sound level meters that measure time-averaged sound level
9.15 Overload indication
9.16 C-weighted peak sound level
9.17 Reset
9.18 Electrical output
9.19 Timing facilities
9.20 Crosstalk in multi-channel sound level meter systems
9.21 Power supply
10 Pattern evaluation report
Bibliography
AS/NZS IEC 61672.2:2019
Online Library subscription information
Online library subscriptions provide a cost-effective solution for organisations of any size to access the latest standards, offering 24/7 access to a personalised catalogue. The service ensures subscribers have have the most up-to-date version of selected standards, incluing automatic updates for any amendments or versions. Pricing is dependent on the chosen standards and the number of concurrent users, with discounts applied from the standards PDF price. For customised subscriptions or further inquiries, contact the Online Library team.