Laboratory equipment and activities

  • Measurements of sound and vibration under standardized conditions in free field space
  • Investigation of sound sources via sound pressure level, intensity
  • Sound source location via the acoustic camera
  • Determination of absorption or sound power in a reverberation room
  • mobile airborne sound measurements for noise protection
  • mobile measurements of airborne and structure-borne noise in vehicles
  • Development of evaluation algorithms with focus on design of experiments, machine learning, statistical methods
  • Head and Torso Simulator for Sound Quality (Brüel&Kjaer, TYPE 4100, with human-like auricle and ear canal, microphone (20 Hz - 20 kHz) at the positions of the ears)
  • Acoustic camera (Bionic XS-56 microphone array; to make sound visible and locate sound source perfectly; optimized distribution of 56 MEMS microphones with sampling rate 48 kHz and frequency range 10 Hz - 24 kHz; measuring range: 33 dB - 120 dB with up to 40 dB dynamic range; from 800 Hz with the beamforming methods; diameter: 27 cm; 7 quickly removable array arms; integrated data acquisition)
  • Acoustic camera (Gfai Tech Ring32; measuring distance: 0.3 m - 5 m; 32 0.25 inch microphones; measuring range of sound level: maximum 130 dB (standard); application frequency range: 800 Hz - 20 kHz)
  • SQuadriga (from HEAD acoustics; 4 analog input channels (with adjustable measuring range) for different sensor types; separate pulse inputs for speed pulses and trigger signals; headphones with built-in microphones for aurally correct recording and playback)
  • B&K 4 channel measurement system with 0.5 inch microphones and dodecahedron loudspeaker (incl. measurement software PULSE; for acoustic measurements in reverberation rooms: reverberation time, sound power, sound insulation, absorption area, etc.)
  • Laser vibrometer Polytec PDV 100 with data acquisition VibSoft-20 (frequency range: 0.5 Hz - 22 kHz; working distance: 90 mm - 30 m; measuring range: 5 mm/s/V, 25 mm/s/V, 125 mm/s/V)
  • Sound level meter (NTI AL-1; measurement of the sound pressure level; analysis of acoustic signals: such as reverberation time and FFT; frequency range: 10 Hz - 20 kHz; dynamic range (with MiniSPL): 30 - 130 dB SPLA; filters: Flat, A, C, X-Curve-1, RLB (loudness in broadcasting)
  • Sound level meter with intensity probes (B&K 2260 Investigator with applications for sound intensity, sound analysis and FFT plus software for display and analysis)
  • Sound level meter (PCE-318; frequency weighting: A, C; time weighting: Fast, Slow; frequency range: 31.5 Hz to 8 kHz; measuring range: 26 - 130 dB)
  • various microphones, calibrators, loudspeakers, headphones and measuring antenna
  • LMS Test.Lab software (comprehensive applications for noise and vibration testing and simulation, data processing and analysis as well as result reporting and presentation: Modal Analysis, Jury Test, Sound Diagnosis, etc.)
  • Software Artemis (playback of recordings; modification of signals in the time domain; analysis with the help of various evaluation algorithms; different display formats; export of files in various formats)
  • Hallroom G114
  • Open space C008/C009​​​​​​​

Acoustics in Bachelor and Master, project studies in Bachelor, final theses

 

Student projects:

  •  Sound measurement at a wind turbine
  •  Insulation effect of PV modules in a scaled model test in free field space
  •  Development of an Active Noise Control System
  •  Sound reduction of a sun simulator at THI
  •  Improvement of room acoustics in schools
  •  Sound insulation certificate for residential buildings

Research:

  • Statistical noise elimination
  • Psychoacoustic noise characterization of electric vehicles
  • Noise pollution when riding a motorcycle
  • Determination of the wind noise component in passenger cars using a correlation method
  • Intercultural psychoacoustic evaluations
  • Noise classification via machine learning
  • Vibration-based Structural Health Monitoring

Laboratory management and team

Vice dean of the Faculty of Mechanical Engineering
Prof. Dr.-Ing. Jörg Bienert
Phone: +49 841 9348-7720
Room: A118
E-Mail:
Lab Engineer
Dr.-Ing. Xiaojing Zhao
Phone: +49 841 9348-2633
Room: C007
E-Mail: