BS EN ISO 11904-1:2002
Current
The latest, up-to-date edition.
Acoustics. Determination of sound immission from sound sources placed close to the ear. Technique using a microphone in a real ear (MIRE technique)
Hardcopy , PDF
English
06-12-2002
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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
Gives basic framework measurement methods for sound immission 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.
| Committee |
EH/1/1
|
| DevelopmentNote |
Supersedes 00/561593 DC (11/2002)
|
| DocumentType |
Standard
|
| Pages |
32
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
| Supersedes |
This part of ISO 11904 specifies basic framework measurement methods for sound immission 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 are 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).
This part of ISO 11904 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.
This part of ISO 11904 is applicable in the frequency range from 20 Hz to 16 000 Hz.
| Standards | Relationship |
| NF EN ISO 11904-1 : 2003 | Identical |
| I.S. EN ISO 11904-1:2002 | Identical |
| UNI EN ISO 11904-1 : 2006 | Identical |
| EN ISO 11904-1:2002 | Identical |
| NBN EN ISO 11904-1 : 2002 | Identical |
| SN EN ISO 11904-1 : 2003 | Identical |
| NS EN ISO 11904-1 : 1ED 2002 | Identical |
| UNE-EN ISO 11904-1:2003 | Identical |
| DIN EN ISO 11904-1:2003-02 | Identical |
| NEN EN ISO 11904-1 : 2002 | Identical |
| ISO 11904-1:2002 | Identical |
| BS 8469:2007 | Personal protective equipment for firefighters. Assessment of ergonomic performance and compatibility. Requirements and test methods |
| PD 6545:2005 | Intended use of human head and ear simulators-guide |
| IEC 60601-1:2005+AMD1:2012 CSV | Medical electrical equipment - Part 1: General requirements for basic safety and essential performance |
| IEC 60942:2003 | Electroacoustics - Sound calibrators |
| IEC 61094-1:2000 | Measurement microphones - Part 1: Specifications for laboratory standard microphones |
| ISO 11904-2:2004 | Acoustics Determination of sound immission from sound sources placed close to the ear Part 2: Technique using a manikin |
| IEC 60268-7:2010 | Sound system equipment - Part 7: Headphones and earphones |
| EN 50332-1:2013 | Sound system equipment: Headphones and earphones associated with personal music players - Maximum sound pressure level measurement methodology - Part 1: General method for "one package equipment" |
| IEC 60268-1:1985 | Sound system equipment. Part 1: General |
| IEC 61260:1995 | Electroacoustics - Octave-band and fractional-octave-band filters |
| ISO 8253-2:2009 | Acoustics Audiometric test methods Part 2: Sound field audiometry with pure-tone and narrow-band test signals |
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