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Datasets of high spatial resolution scans of the airborne ultrasound field at the front, back and left side of an ultrasonic welding machine

Schöneweiß, Robert; Kling, Christoph; Koch, Christian


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    <subfield code="a">This project has received funding from the EMPIR programmen co-financed by the Participating States and from the European Union's Horizon 2020 research and innovation programme.
Grant Number: 15HLT03
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    <subfield code="a">&lt;p&gt;This dataset contains measuring data which are the result of investigations of the&amp;nbsp;airborne ultrasound field of an ultrasonic welding machine. These investigations have been conducted within the scope of the EMPIR project 15HLT03: &amp;ldquo;Ears II - Metrology for modern hearing assessment and protecting public health from emerging noise sources&amp;rdquo;. In the context of &amp;ldquo;Ears II&amp;rdquo;, they served gaining knowledge for occupational safety and health. Here, the aim was to investigate the structure of&amp;nbsp;the airborne ultrasound field at ultrasound related workplaces. 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.&lt;/p&gt;

&lt;p&gt;The dataset contains data of 6 measurements:&lt;/p&gt;

&lt;ul&gt;
	&lt;li&gt;At the back of the ultrasonic welding machine at a vertical surface with dimensions 168 cm x 150 cm (width x height)&lt;/li&gt;
	&lt;li&gt;At the left side of the ultrasonic welding machine at a vertical surface with dimensions&amp;nbsp;168 cm x 150 cm (width x height)&lt;/li&gt;
	&lt;li&gt;At the front of the ultrasonic welding machine at a&amp;nbsp;horizontal surface with dimensions&amp;nbsp;168 cm x 75&amp;nbsp;cm (width x depth)&lt;/li&gt;
	&lt;li&gt;At the front of the ultrasonic welding machine at a vertical surface with dimensions&amp;nbsp;168 cm x 150 cm (width x height) with a distance of 24 cm to the sonotrode&lt;/li&gt;
	&lt;li&gt;At the front of the ultrasonic welding machine at a vertical surface with dimensions&amp;nbsp;168 cm x 150 cm (width x height) with a distance of 99 cm to the sonotrode&lt;/li&gt;
	&lt;li&gt;At the front of the ultrasonic welding machine in a volume with dimensions 58 cm x 33&amp;nbsp;cm x 50&amp;nbsp;cm&amp;nbsp;(width x depth x height)&amp;nbsp;&lt;/li&gt;
&lt;/ul&gt;

&lt;p&gt;The measuring data is the square of the absolute value of the discrete Fourier transform of the signal voltage re 1 V&lt;sup&gt;2&lt;/sup&gt;&amp;nbsp;represented in the frequency domain, converted by fast Fourier transform, in the frequency range 0 &amp;ndash; 100 kHz with a frequency resolution&amp;nbsp;of 15.625 Hz. The data can be converted to sound pressure levels (SPL) using the&amp;nbsp;calibration values published as a supplementary dataset.&lt;/p&gt;</subfield>
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