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The following publications are directly linked to the projects EMRP HLT01 Ears and EMPIR 15HLT03 Ears II:

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Datasets of high spatial resolution scans of the airborne ultrasound field of an ultrasonic welding machine either with or without an artificial head at a worker’s sedentary position

Author(s):R. Schöneweiß, Christoph Kling, Christian Koch
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Abstract:This dataset contains measuring data which are the result of investigations of the influence of a person on an airborne ultrasound field. These investigations have been conducted within the scope of the EMPIR project 15HLT03: “Ears II - Metrology for modern hearing assessment and protecting public health from emerging noise sources”. In the context of “Ears II”, they served gaining knowledge for occupational safety and health. Here, the aim was to investigate the influence of a worker on the airborne ultrasound field at his or her workplace. Therefore, a reference workstation was set up in the laboratory of the Physikalisch-Technische Bundesanstalt (PTB). The airborne ultrasound field of a typical industrial source of airborne ultrasound (an ultrasonic welding machine) was measured with a scanning microphone system with a high spatial resolution. 2 measurements have been performed with an artificial head in front of the ultrasonic welding machine at a worker’s sedentary position. Those 2 measurements have been performed at a vertical surface with dimensions 24 cm x 27 cm (width x height) in the same plane as the ear canal of the artificial head, one measurement each at the left and the right side of the artificial head. For comparison with an uninfluenced sound field, these measurements have been repeated at the same surfaces without the artificial head in front of the ultrasonic welding machine. The measuring data is the discrete Fourier transform of the squared signal voltage re 1 V^2 represented in the frequency domain, converted by fast Fourier transform, in the frequency range 0 – 100 kHz with a resolution bandwidth of 15.625 Hz. The data can be converted to sound pressure levels (SPL) using the given calibration values. DOI: 10.7795/720.20190606

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