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  HEAD Visor - Third-generation beam-forming
HEAD Press Release Herzogenrath, March 25, 2013
HEAD Visor - Third-generation beam-forming
The new version 3.0.100 of the HEAD VISOR software provides you with additional high-resolution sound source localization methods. Depending on your application, you can enable special algorithms providing a much deeper insight into the acoustic behavior of your test object.
With the deconvolution algorithm, you can sharpen the images of emitting sound sources using a slider. Inaccuracies occurring when capturing the sound field with the microphone array can be removed mathematically. This is useful particularly in situations with multiple sound sources or large-area sources.
If multiple sound sources with different volumes occur simultaneously, stepping comes in handy. Simply click on the loud sources in the image to remove them from the measurement data. This reveals additional relevant lower level noise sources that the test object might have. You can remove up to six sound sources from the measurement at the same time, even in live view.
Magic Stick
The integrated Magic Stick option is an elegant solution for accurately localizing lowfrequency sources. It allows suitable probes to be used to acquire the required information from the near-field emissions of the measurement object. The probe is moved across the object before the “eyes” of the HEAD VISOR. With its three integrated cameras, the system continuously monitors the current position of the near-field probe and uses this information to calculate a complete acoustic image of the measurement object. After just one measurement, the user can evaluate the entire frequency range from 20 Hz to 20 kHz in detail (see figure below).
Main component separation
The new method called component separation is particularly suited for complex measurement objects with several sound sources close to each other (e.g. a combustion engine). In an intermediate step, you can first determine the main components forming the sound field. Afterwards, the individual components are auralized and visualized separately, allowing for a much deeper understanding of the measurement object with the maximum ease of operation.
Screenshot HEAD VISOR: 100 Hz hum of the 2nd engine order from the air intake at 3000 rpm
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HEAD acoustics has developed into one of the world's leading specialists in the fields of sound and vibration analyses and optimization. For more than 25 years HEAD acoustics has developed products and solutions for artificial head recording and playback technology, exceptional acquisition and analysis software and techniques, and communication measurement technology.
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