Calibration Service - Acoustics

Trust a competent and DAkkS-accredited partner when it comes to the calibration of your acoustic measuring instruments. We calibrate your measuring microphones, sound level meters, sound level calibrators, pistonphones as well as a wide range of acoustic devices quickly and reliably.

In order to perform reliable measurements, your measuring equipment must be traced back or calibrated at regular intervals. This way you can ensure that you make reproducible measurements and improve their quality.

Sound level meters/
measurement chains

Calibration in accordance with IEC 61672-3:2013 and DIN 45657:2014

• Free-field calibration
  125 Hz…20 kHz (sound pressure level 75 dB...94 dB)
• Pressure calibration (in an electroacoustic coupler)
  31.5 Hz…16 kHz (64 dB…114 dB)
• Pressure calibration (two-point with pistonphone and calibrator)
  250 Hz (94 dB, 114 dB or 124 dB) and 1 kHz (94 dB or 114 dB)
• Pressure chamber, low frequency (only factory calibration possible)
  0.1 Hz…31.5 Hz (124 dB)
• Full electrical calibration

Sound calibrators, pistonphones
and multi-tone calibrators

• Pressure calibration (in an electroacoustic coupler)
  31.5 Hz…16 kHz (60 dB…130 dB)
• Pressure calibration (two-point with pistonphone)
  250 Hz (94 dB, 114 dB or 124 dB) and 1 kHz (94 dB or 114 dB)

Outdoor microphones

• Free-field calibration
  125 Hz...20 kHz (74 dB…94 dB)
• Pressure calibration (in an electroacoustic coupler)
  31.5 Hz…16 kHz (64 dB…124 dB)
• Pressure calibration (two-point with pistonphone and calibrator)
  250 Hz (94 dB, 114 dB or 124 dB) and 1 kHz (94 dB or 114 dB)

Sound intensity probes

• Calibration of the relative free field frequency response of each microphone: 125 Hz...20 kHz
• Including two-point pressure chamber calibration: 250 Hz (124 dB) and 1 kHz (94 dB or 114 dB)
• Calibration of the phase frequency response in the pressure chamber to determine the residual intensity of the probe
• Conformity testing of the frequency response and the residual intensity against the limits defined in the standard DIN EN 61043:1994

By means of a two-channel technology, sound intensity probes enable, in addition to sound pressure level measurement, the recording of the sound pressure gradient and thus the calculation of the sound intensity.

Frequency range

• Free field: 125 Hz...20 kHz
• Pressure chamber: 31.5 Hz...16 kHz (DAkkS-accredited, from 0.1 Hz as factory calibration)

Amplitude range

• Free field: 74 dB...94 dB
• Pressure chamber: 64 dB...124 dB

Calibration in accordance with

• IEC 61672-3:2013
• IEC 61094-8:2012
• IEC 60942:2004
• IEC 61094-5:2016