2023
DOI: 10.3390/eng4040148
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Comparison of Three Linear Digital Filters Applied to Improve the Quality of the Measured Acoustic Field

Estevão Patricio Rodrigues,
Djalma Simões dos Santos,
Flávio Buiochi

Abstract: The measurement of acoustic fields generated by ultrasonic transducers is important for determining the focal length, lateral resolution, and amplitudes of the lateral and grating lobes. The acoustic field is commonly characterized by a set of scans using a needle hydrophone. The output of the hydrophone can be connected to an analog filter to enhance the signal. However, the analog filter might not be sufficient to avoid the noises that distort the signals. Alternatively, linear digital filters can be advanta… Show more

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