SN EN ISO 11904-1 : 2003
Current
The latest, up-to-date edition.
ACOUSTICS - DETERMINATION OF SOUND IMMISSIONS FROM SOUND SOURCES PLACED CLOSED TO THE EAR - PART 1: TECHNIQUE USING A MICROPHONE IN REAL EAR (MIRE-TECHNIQUE)
01-12-2013
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Measurement principle
5 Instrumentation
5.1 Ear canal microphone
5.2 Reference field microphone
5.3 Check of calibration
5.4 Filters
6 Subjects
7 Use of ear canal microphone
7.1 Choice of ear canal measurement position
7.2 Mounting of microphones
7.3 Safety
8 Determination of free-field or diffuse-field
related equivalent continuous A-weighted sound
pressure level
8.1 Measurement of ear canal sound pressure level
8.2 Conversion to free-field or diffuse-field related
sound pressure level
8.3 A-weighting and summation
9 Free-field and diffuse-field frequency responses for
selected ear canal measurement positions
10 Determination of free-field or diffuse-field frequency
responses
10.1 General
10.2 Measurement principle
10.3 Establishment of a free reference sound field
10.4 Establishment of a quasi-free reference sound
field
10.5 Establishment of a diffuse reference sound field
10.6 Measurement of the reference sound field
10.7 Measurement of ear canal sound pressure level in
reference sound field
10.8 Determination of free-field or diffuse-field
frequency response
10.9 Simplifications in specific cases
10.10 Optional check of the measurement arrangement
11 Test report
Annex A (informative) Example of sources of measurement
uncertainty
Annex B (informative) Example of an uncertainty analysis
Bibliography
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