Acoustics. Determination of sound immission from sound sources placed close to the ear. Part 1: Technique using a microphone in a real ear (MIRE technique) (ISO 11904-1:2002)
Tuote ladattavissa hetiToimitusaika on noin 1 - 2 työpäivääToimitusaika on 3 - 5 työpäivää.
ISO 11904-1:2002 specifies basic framework measurement methods for sound immissions from sound sources placed close to the ear. These measurements are carried out with miniature or probe microphones inserted in the ear canals of human subjects. The measured values are subsequently converted into corresponding free-field or diffuse-field levels. The results can be given as free-field related or diffuse-field related equivalent continuous A-weighted sound pressure levels. The technique is denoted the microphone-in-real-ear technique (MIRE technique). ISO 11904-1:2002 is applicable to exposure from sources close to the ear, for example during equipment tests or at the workplace by earphones or hearing protectors with audio communication facilities. ISO 11904-1:2002 is applicable in the frequency range from 20 Hz to 16 000 Hz.
Tämän julkaisun valmistelusta Suomessa vastaa Metalliteollisuuden Standardisointiyhdistys ry, puh. 09 19 231 (vaihde).
Sisällysluettelo
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 Example of sources of measurement uncertainty (informative)
Annex B Example of an uncertainty analysis (informative)
IEC 60065:2001
IEC 60268-7:2010
IEC 60601-1:2005
IEC 60942:1997
IEC 61094-1:2000
IEC 61260:1995
IEC 61672-1:2002
ISO 8253-2:1992 Acoustics -- Audiometric test methods -- Part 2: Sound field audiometry with pure tone and narrow-band test signals