Measurements

The SAM department uses common methods of experimental machine acoustics. These include sound pressure measurements with microphones as well as the recording of structure-borne sound with acceleration sensors or laser vibrometers. The recording of the various signals can be used to create noise maps, to determine sound power, for condition monitoring or to measure the STI in components. Various loudspeakers, electrodynamic shakers of different power classes and impulse hammers of different sizes are available as excitation sources. We use hardware-in-the-loop systems to investigate active systems. Our new acoustics laboratory offers an ideal environment for measurements of all kinds.

Below you will find an overview of the measurements typically offered at SAM. If you cannot find what you are looking for in the services listed, please do not hesitate to contact us.

Determination of modal values (natural frequencies, eigenvectors, modal damping) of structures of different sizes

  • Evaluation of existing constructions, weak point analysis from a structural dynamic perspective, recommendations for possible design modifications
  • Excitation by means of electrodynamic shakers or impact hammers of various sizes
  • Sound pressure level measurement by means of ½” and ¼” microphones
  • Sound power measurement by means of the reference sound source method, reverberation room technique, and free-field method up to an accuracy class of 2
  • Noise source identification by means of an acoustic camera (ring array, spheric array, and 3D array)
  • Sound intensity measurement by means of a p-p sound intensity probe (3D) or a p-u sound intensity probe (1D)
  • Creation of noise maps
  • Acceleration measurement with uniaxial and tri-axial accelerometers
  • Measurement of the surface velocity by means of (scanning-) laser vibrometers

Measurement of samples using 2-microphone methods as corresponding to the DIN 10534-2 standard “Determination of the sound absorption coefficient and impedance in a standing wave tube – part 2: methods with transfer function”

  • Measuring range: 150 Hz – 1250 Hz
  • Probe thickness maximum 190 mm

contact person:

  Name Working area(s) Contact
Ali Movahed M.Sc.
+49 6151 16-23653
L1|01 262