Vibration Calibration

SPEKTRA Calibration Systems for Noise and Vibration

SPEKTRA is specialized in designing and manufacturing systems for:

The product group “Calibration Solutions” includes calibration systems as well as services

The SPEKTRA family of CS18 calibration systems offers the calibration for the following measurands:

  • Acceleration (0.05 Hz … 350 kHz)
  • Shock (few mm/s² … 2,000 km/s²)
  • Acoustics (0.1 Hz … 20 kHz, bis 124 dB)
  • Dynamic Force (10 Hz … 1 kHz, few mN … 20 kN)
  • Dynamic Pressure (up to 4,000 bar)


Calibration systems for amplitude-frequency response and displacement (sine) as well as a comparison of peak amplitudes (shock).

  • Devices under test: Accelerometers, Seismic Sensors, Geophones, Vibration Calibrators, Measuring Equipment, Analyzers, Laser-Vibrometer.

Our calibration products include complete calibration systems as well as various exciters and accessories to fit your specific demands.


  • Comparison Calibration by using the substitution method

    • Devices under test:
      Sound Level Meters, Microphones, Acoustical calibrators, Pistonphone, Measuring Equipment, Analyzers.

We offer solutions for sensor system-level testing in very small areas like development departments up to large-scale production.

Electrical Parameters

  • Comparison/Substitution Calibration for Amplitude-Frequency Response and Displacement Angle

    • Devices under test:
      Charge Amplifier, Voltage Amplifier, IEPE-Amplifiers, Calibration Systems, Analyzers.

Typical applications of those vibration exciters are modal tests of buildings, bridges and other large structures.

Accelerometer calibration and mounting effect

Transducer is a device that converts signal to another mostly to electrical signal. When a transducer being used in some specific purposes, it can be called as a “sensor”. A type of transducer that being used mostly for vibration measurement is an “Accelerometer” which is illustrated in the picture below.


Mounting conditions of a transducer to the test object are one of the most significant factors that can affect the vibration result. Different mounting makes different frequency response or that creating resonance frequency.

Examples of sensor mounting type

Accelerometer sensor mounting

The mounting of sensor to the surface of the test object is an important factor to be concerned. Choosing appropriate mounting type will help to improve the accuracy of the measurement. The mounting surface should be flat smooth surface. There shouldn’t be elasticity between the surface and the sensor. Handheld type may be used with survey method, but the measurement range or filtering should be considering to not exceed at 1000 Hz.

Mouting Sensor by Stud mounting in calibration laboratory
Mouting Sensor by Stud mounting in calibration laboratory 2

Example Mouting Sensor by Stud mounting in calibration laboratory

Acoustic Laboratory Thailand (ALT), we are proud to provide vibration sensor calibration services for any accelerometer in accordance with the ISO 16063-21: Calibration of vibration transducers by comparison to a reference transducer. The reference transducer is traceable to an international organization.