TECHNICAL ACOUSTICS
TECHNICAL ACOUSTICS
Technical acoustics and vibration engineering deals with the physical generation of sound and vibrations and their propagation in air and solid media. With the help of our PAK software, all sound-specific characteristics can be precisely recorded, clearly displayed and evaluated according to your compliance with the standards.
Sound power
An important parameter for the source strength of a sound generator is the sound power. The PAK software supports the user in determining the sound power in accordance with DIN EN ISO 3740 ff. in low-reflection rooms or half-rooms (envelope surface method), in accordance with DIN EN ISO 3744 and under DIN EN ISO 3745. It is also possible to determine the sound power in a reverberation room of known reverberation time or to determine it from a comparison with a reference sound source of known sound power (comparison method). For example, the following analyses are available: sound power level, sound pressure level curve, vibration level curve, third-octave band spectra, FFT time-frequency analyses.
FAZUA - Der e-Bike-Sound
Schallleistungsmessungen am eBike von FAZUA in Zusammenarbeit mit Müller-BBM GmbH, Planegg (Deutschland)
Wir zeigen Ihnen, wie FAZUA und Müller-BBM zusammengearbeitet haben, um Geräusche von verschiedenen eBikes in den Testeinrichtungen von Müller-BBM in Planegg, Deutschland, zu messen.
Sie sehen, wie Schallleistungsmessungen im reflexionsarmen Halbraum mit der leistungsstarken NVH-Software-Suite PAK® einfach durchgeführt werden können.
Sound intensity
If no special measuring room is available, the sound power can also be determined by measuring the sound intensity. The PAK software supports the use of different probes (pressure/pressure and pressure/velocity) and continuously checks all important sound field indicators. In addition, the radiation behavior of the test object is graphically visualized (sound field mapping).
Sound source localization
An imaging method is the sound source localization through a microphone array. The sound-radiating surface of the test object is "scanned" (beamforming) and the measured values are color-coded via a live video image. The PAK software thus enables the graphic representation of time-varying sound emissions.
