Equipment

Device/Manufacturer:

• Students

Physical quantities:

• Determination of the impulse response of model-scale rooms
• Software based on MATLAB algorithms

Areas of application:

• 3D room acoustic modelling and measurement
• Auralisation (simulation of sound) of rooms

Device/Manufacturer:

• EASE software from ADA Acoustic Design Ahnert

Physical parameters:

• Calculation of the impulse response of rooms
• Software based on ray-tracing algorithms

Areas of application:

• 3D room acoustic simulations
• Auralisation (visualisation of sound) of rooms

Device/Manufacturer:

• BMW

Description:

• Experiment: Order analysis during engine start-up
• Hardware: National Instruments
• Software: MATLAB

Device/Manufacturer:

• Dodecahedron loudspeaker and power amplifier
• Norsonic standard hammer mechanism
• Rotating microphone boom
• SAMURAI measurement system with SAMBA option from SINUS Messtechnik

Physical parameters:

• Reverberation time of rooms
• Structure-borne sound insulation index of walls, doors and windows
• Impact sound

Areas of application:

• Building physics/building acoustics: complex building acoustics investigations in real buildings

Device/Manufacturer:

• COMSOL Multiphysics software from COMSOL

Physical quantities:

• Description of physical processes using differential equations
• The software is based on the finite element method.

Areas of application:

• 1D, 2D and 3D simulations
• Coupling of different physical problems (multiphysics) is possible

Device/Manufacturer:

• AED 7000 – AcoustiCam® from Gesellschaft für Akustikforschung Dresden mbH
• Hardware – NI PXIe-4496 AD/DA converter from National Instruments
• SoundCam 2.0, CAE Software und Systems GmbH

Physical parameters:

• Localisation and separation of sound sources in the frequency range from approx. 500 Hz to 20 kHz. Any sound situation can be represented as coloured, two-dimensional, absolute sound pressure distributions using a single measurement or by continuous
• measurement along any scan area as coloured, two-dimensional, absolute sound pressure distributions. To visualise the sound situation, the
• localisation result is overlaid onto a video recording of the object under investigation. 

Device/Manufacturer:

• BASTIAN software / Company: DataKustik GmbH

Physical parameters:

• Acoustic design of building components in accordance with DIN EN 12354

Areas of application:

• Calculation of airborne sound insulation between rooms in accordance with DIN EN 12354-1 (in third-octave bands or using single figures)
• Calculation of impact sound insulation between rooms in accordance with DIN EN 12354-2 (in third-octave bands or using single-number values)

Device/Manufacturer:

• Polytec

Physical quantities:

• Surface sound velocity

Areas of application:

• optical vibration measurement
• Structure-borne sound measurement technology
• Modal analysis

Device/Manufacturer:

• LMS Virtual.Lab software / LMS

Physical parameters:

• LMS Virtual.Lab is a software suite for the simulation and optimisation of mechanical systems with regard to their structure, acoustics, dynamics and service life

Areas of application:

• 1D/3D simulations

Device/Manufacturer:

• KA 350 high-frequency audiometer,
• AT 235h tympanometer

Physical parameters:

• Human air- and bone-conduction hearing thresholds in the range 125 Hz … 16 kHz (delta L < 2.5 dB)
• Supra-threshold audiometry
• Tympanic membrane compliance, stapedius reflex

Applications:

• Assessment of hearing ability in test subjects
• Detection of hearing damage

Device/Manufacturer:

• LMS Pimento dual-channel analyser and Pimento software for frequency analysis and modal analysis, LMS
• Impact hammer, accelerometer and charge amplifier, Brüel & Kjaer

Physical quantities:

• Vibration acceleration, velocity and displacement of machine structures
• Frequency analysis
• Natural modes of structures (shape, frequency, amplitude)

Areas of application:

• Vibration analysis in the field of machinery acoustics: Analysis of plant and components
• Visualisation and animation of vibration modes (natural modes)

Device/Manufacturer:

• Measurement systems from SINUS and National Instruments
• Various function generators (e.g. HAMEG)
• HM 407 oscilloscope (HAMEG)

Physical quantities:

• Signal spectra (filtering, FFT)
• Auto- and cross-spectra
• Transfer functions
• Sound pressure level

Areas of application:

• Analysis of time-varying voltage signals (e.g. also as output signals from various sensors such as microphones or accelerometers)
• Noise analysis

Equipment/Manufacturer:

• Artificial head, headband microphones, DAT recorder, ARTEMIS and unSQLab analysis systems (portable), 8 headphone playback stations from HEAD Acoustics

Physical parameters:

• Sound pressure level (various frequency and time weightings)
• Spectra (filter, FFT, wavelet)
• Correlation functions, transfer functions
• Statistical parameters (percentiles, etc.)
• Psychoacoustic parameters (loudness, roughness, sharpness, tonality, etc.)
• Modulation spectra

Areas of application:

• monaural and binaural recording
• Noise measurement and analysis
• Signal analysis; psychoacoustic analysis
• Auditory comparisons
• Sound design (e.g. filtering using various editable filters); investigations into noise quality and annoyance

Equipment/Manufacturer:

• B&K 4206 dual-microphone impedance tube, including analyser and computer with control and evaluation software

Physical quantity:

• Acoustic absorption coefficient alpha of materials
• Complex reflection factor
• Complex impedance
• Measurement for perpendicular sound incidence in the frequency range 50 Hz to 6.4 kHz

Areas of application:

• Investigation of materials used as acoustic absorbers in the fields of building acoustics and machinery acoustics

Equipment/Manufacturer:

• Various handheld sound level metres, noise dosimeters, vibration meters and analysers
  • 6 NTI Audio XL2 handheld sound level metres
  • 3 ‘Optimus’ handheld sound level metres, Class 1 and Class 2, manufactured by CIRRUS
  • 2 CEL-281 computing dosimeters from CEL, and a VA 10 analyser and vibration meter from RION
  • CEL 593 sound analyser, including modules for building acoustics and transient signals, manufactured by CEL
  • Brüel & Kjaer 225 sound analyser
  •  
• Impedance measurement probe
• Various measuring microphones and accelerometers

Physical quantities:

• Sound pressure level (various time and frequency weightings)
• Averaged levels
• Spectra

Areas of application:

• Investigation of noise emissions, e.g. industrial noise in the neighbourhood (TA Lärm)
• Noise in the workplace, traffic noise and much more

Equipment/Manufacturer:

• B&K 3541 sound intensity calibrator, B&K 4205 controllable and calibratable sound power source from Brüel & Kjaer

Physical quantities:

• Sound intensity, pressure and velocity
• Spectra

Areas of application:

• General sound analysis
• Determination of sound power from machinery and plant, sound source localisation
• Verification of the calibration of sound intensity measurement systems

Device/Manufacturer:

• IMMI noise emission prediction software from WÖLFEL

Physical parameters:

• Calculation values for noise levels, e.g. in accordance with DIN 18005, VDI 2714, RLS 90/19, XPS, Schall 03

Areas of application:

• Noise emission prediction for outdoor sound propagation across varying topography, built-up areas and different types of noise sources (road traffic, rail traffic, point and area sources for industrial noise, etc.)
• Production of noise contour maps
• Comparison with limit and guideline values for areas with different types of building use