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Vibration measurements on buildings - Structural vibrations
Building dynamics measurements & monitoring

Measuring Infrasound - Measuring Humming Sound - Structure-borne Sound Measurement

Structure-borne sound measurement in buildings

In this presentation, I will demonstrate how infrasound and low-frequency building vibrations can be measured using a seismic accelerometer.

The measured structure-borne sound source, with a frequency of 80 Hz * 60 seconds is a fan, with 4800 rpm, of a NAS located in the corner of a building.

Structural Dynamics Vibration Measurement System

Vibration measurements on buildings - Structural vibrations - Building dynamics measurements & monitoring
  • Price: 6560 €

Modal hammer – accelerometer Sensor DAQ
NVH-IMP software for FRF measurement

Application areas include scientific research, industrial monitoring, and construction.

The modal hammer is connected to the first channel, and the accelerometer to the second channel, enabling structural investigations, for example, of bridge or building structures.

The measurement is performed using the NVH-IMP software, which is pre-configured for impact hammer test measurements with an FRF transfer function.

The sensor sensitivity of the modal hammer in N and the sensitivity of the accelerometer in m/s² are entered into the software before the test. The size of the sensors can vary depending on the object’s size and mass.

All important measurement results are displayed by the software. Double impacts are immediately visible.

Triaxial Seismic Accelerometer

triaxial low frequency accelerometer
  • Price: 2778 €

KS48C-3 + 729 Tripod floor plate Set

The triaxial seismic accelerometer set is designed for measuring low-frequency vibrations. Its high sensitivity makes it ideal for a wide range of applications. 
 
The highly sensitive accelerometer has a measuring range of 6g and can therefore detect even the smallest vibrations. 

KS48C Specifications

  • High Sensitivity Accelerometer
  • Suitable for seismic measurements and structural investigations at low frequencies
  • Highly sensitive sensor system without internal amplification thus excellent resolution and lowest noise
  • Particularly good sensitivity/ mass ratio
  • IEPE voltage output
  • Frequency response 0.07 Hz – 4000 Hz (-3dB)
  • Sensitivity 1000 mV/g
  • Residual noise wide band; <14 µg RMS (0,5 – 10000 Hz)
  • Mass 165 grams
  • Measuring range ± 6 g
  • Robust design with M12 connector
  • Protection grade IP67 

KB12VD/01 + 729 Tripod floor plate Set

High Sensitivity Vibration Sensor Seismic Accelerometer
  • Price: 1260 €

The seismic accelerometer set is designed to measure low-frequency vibrations. Its high sensitivity makes it ideal for a wide range of applications. 

The highly sensitive accelerometer has a measuring range of 10 V/g, allowing it to detect even the smallest vibrations. 

KB12VD Specifications

  • High Sensitivity Accelerometer
  • Suitable for seismic measurements and structural investigations at low frequencies
  • Highly sensitive sensor system without internal amplification thus excellent resolution and lowest noise
  • Particularly good sensitivity/ mass ratio
  • Air-damped resonance and overload protection by friction coupling
  • IEPE voltage output
  • Frequency response 0.05 Hz – 260 Hz
  • Sensitivity 10 000 mV/g
  • Mass 150 grams
  • Measuring range ± 0.6 g