Electroacoustics. Measurement microphones -- Methods for determining the free-field sensitivity of working standard microphones by comparison
This part of the IECÂ 61094 series is applicable to working standard microphones meeting the requirements of IECÂ 61094-4. It describes methods of determining the free-field sensitivity by comparison with a laboratory standard microphone or working standard microphone (where applicable) that has been calibrated according to either:
IECÂ 61094-3,
IECÂ 61094-2 or IECÂ 61094-5, and where factors given in IEC/TSÂ 61094-7 have been applied,
IECÂ 61094-6,
this part of IECÂ 61094.
Methods performed in an acoustical environment that is a good approximation to an ideal free-field (e.g. a high quality free-field chamber), and methods that use post processing of results to minimise the effect of imperfections in the acoustical environment, to simulate free-field conditions, are both covered by this part of IECÂ 61094. Comparison methods based on the principles described in IECÂ 61094-3 are also possible but beyond the scope of this part of IECÂ 61094.
NOTE 1 This part of IECÂ 61094 is also applicable to laboratory standard microphones meeting the requirements of IECÂ 61094-1, noting that these microphones also meet the electroacoustic specifications for working standard microphones.
NOTE 2 This part of IECÂ 61094 is also applicable to combinations of microphone and preamplifier where the determined sensitivity is referred to the unloaded output voltage of the preamplifier.
NOTE 3 Other devices, for example, sound level meters can be calibrated using the principles of this part of IECÂ 61094, but are not within the scope of this standard.
| SDO | BSI: British Standards Institution |
| Document Number | EN 61094-8 |
| Publication Date | May 31, 2013 |
| Language | en - English |
| Page Count | 34 |
| Revision Level | |
| Supercedes | |
| Committee | EPL/29 |