acoustics
National Laboratory of Acoustics
Acoustics at primary level
DFM is the national laboratory for free-field calibrations and one of the best laboratories in the world. We offer many different measurements and calibrations within acoustics and we provide traceability to a large number of manufacturers and laboratories around the world.
We work constant to develop new services that are in demand by Danish companies but also to improve existing services.
We offer services in the following areas:
- Calibration of pressure sensitivity
- Calibration of free-field sensitivity
- HF calibrations
- Reciprocity calibrations
- Comparison calibrations
- Calibration of pistonphones
- Calibration of sound calibrators
- Calibration of ear simulators
- Acoustic software
If you have questions, are looking for guidance or can not find what you are looking for on our website then contact us.
Calibration of absolute pressure sensitivity of microphones
DFM offers accredited calibration of absolute pressure sensitivity of microphones both as reciprocity, comparison and actuator response.
We offer calibrations of all types of microphones over a wide frequency range from 2 Hz to 200 kHz.
All calibrations are performed in our accredited laboratory at DTU in Lyngby.
Accredited calibration in the area:
Calibration pressure pressure calibration:
Frequency range (LS1 and selected WS): 2 Hz – 12.5 kHz
Frequency range (LS2): 2 Hz – 31.5 kHz
Datasheet
Actuator response:
Frequency range (WS1, WS2, WS3): 2 Hz – 100 kHz
Calibration outside accreditation in the area:
Actuator response:
Frequency range (WS1, WS2, WS3): 100 kHz – 200 kHz
If you want calibration outside these areas, contact us for more information.
Accredited calibrations are performed in accordance with DANAK Accreditation Reg. Nr. 255 as well as our internally ISO 9001 certified quality system.
Calibration of free-field sensitivity
DFM offers calibration of absolute free field sensitivity of microphones, both as reciprocity and comparison.
We offer calibrations over a wide frequency range.
Accredited calibration in the area:
Free field reciprocity calibration:
Frequency range (LS1): 250 Hz – 21 kHz
Frequency range (LS2): 250 Hz – 31.5 kHz
Free field comparison calibration:
Frequency range (LS1, WS1): 250 Hz – 25 kHz
Frequency range (LS2, WS2): 250 Hz – 30 kHz
Frequency range (WS3): 250 Hz – 100 kHz
If you want calibration outside these areas, contact us for more information.
Accredited calibrations are performed in accordance with DANAK Accreditation Reg. Nr. 255 as well as our internally ISO 9001 certified quality system.
Datasheet
Calibration of piston phone, calibrator and simulator
DFM offers calibration of piston phones, sound calibrators, multifunction calibrators and ear simulators.
Accredited calibration in the area:
Pistonphone calibration
Sound calibrator and multifunction calibrator
Ear simulator:
Frequency range: 20 Hz – 16 kHz
If you want calibration outside these areas, contact us for more information.
Datasheet
Accredited calibrations are performed in accordance with DANAK Accreditation Reg. Nr. 255 as well as our internally ISO 9001 certified quality system.