Laboratory for acoustics

• 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