IEC 61094-8
Measurement microphones – Part 8: Methods for determining the free-field sensitivity of working standard microphones by comparison
Organization: | IEC |
Publication Date: | 1 September 2012 |
Status: | active |
Page Count: | 66 |
ICS Code (Electroacoustics): | 17.140.50 |
scope:
This part of the IEC 61094 series is applicable to working standard microphones meeting the requirements of IEC 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:
- IEC 61094-3,
- IEC 61094-2 or IEC 61094-5, and where factors given in IEC/TS 61094-7 have been applied,
- IEC 61094-6,
- this part of IEC 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 freefield conditions, are both covered by
this part of IEC 61094. Comparison methods based on the principles
described in IEC 61094-3 are also possible but beyond the scope of
this part of IEC 61094.
NOTE 1 This part of IEC 61094 is also applicable to laboratory
standard microphones meeting the requirements of IEC 61094-1,
noting that these microphones also meet the electroacoustic
specifications for working standard microphones.
NOTE 2 This part of IEC 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 IEC 61094, but are
not within the scope of this standard.
Document History
