Measurement microphones
In our facilities we have a variety of different microphone-types. The different types can be divided into three groups namely pressure, random/diffuse field (pf, ra) calibrated and free field (ff.) individually calibrated microphones. Further it is so that some microphones require 200V dc polarisation, and other absolutely not.
Hint: check specifications/manual before connecting equipment - thank you.
Hint II:"When selecting microphones it is important to first understand the measurement requirement and how this imposes demands on the performance of the microphone" (B&K SV)
Measurement Microphones available in lab.facilities
- B&K 4133 1/2" ff. - general purpose ~12.5mV/Pa
- B&K 4134 1/2" pp. - medium & high level measurements in audio & coupler measurements ~12.5mV/Pa
- B&K 4135 1/4" ff. - high level, high frequency measurements ~4mV/Pa
- B&K 4136 1/4" ff. - random incidence, couplerm high level, high frequency measurements ~1.6mV/Pa
- B&K 4144 1/1" pp. - coupler, low level, low frequency measurements, audiometer calibration ~50mV/Pa
- B&K 4145 1/1" ff. - general low level, low frequency measurements ~50mV/Pa
- B&K 4160 1/1" pp. - coupler measurements and laboratory standard ~50mV/Pa
- B&K 4155 1/2" ff. - general purpose, low level ~50mV/Pa
- B&K 4165 1/2" ff. - general purpose, low level ~50mV/Pa
- B&K 4166 1/2" pp. - general purpose, for random incidence ~50mV/Pa
- GRAS 40EN 1/1" pp. - coupler, low level, low frequency measurements, calibration ~50mV/Pa
- GRAS 40AE 1/2" ff. - general purpose ~50mV/Pa
- GRAS 40AD 1/2" pp. - general coupler purpose ~50mV/Pa (eg. used in Valdemar HATS/MP3)
- GRAS 40AZ 1/2" ff. - Low Frequency microphone ~50mV/Pa
- T-Bone MM-1 1/4" P-48 phantompowered measurement microphone ~20mV/Pa
We also have special microphones which are aimed for special measurements.
- B&K 4179 1/1" ff. - very low level measurements ~100mV/Pa
- B&K 41xx 1/2" & 1/4" - special microphones for intensity measurements
- B&K 4182 - probe microphone for measurements in narrow spaces
- B&K 4193 - infrasound measurements
- B&K 8104 - microphones/hydrophones
- Sennheiser KE4-211-2 - used for in-ear and other measurements/recordings
- Knowles FG23329 - used for in-ear measurements/recordings
and of course we also have a number of microphones aimed for recording use - please take a look at studiomicrophones
If you're looking for more background information on measurement microphones you can find some information in B&K microphone handbook [
] or eventually in some of the technical notes & handbooks available
You might also be interested to know a little about calibration procedures
Work allways in progress - page will be updated !
Tell us what info you expect to find here - please.