The paper presents a comparison of five configurations used to test intermodulation of ultrasonic signals. All five require the use of ultrasonic loudspeakers in an anechoic, low-noise environment. Settings vary in the number and type of digital-to-analog converters and loudspeakers, as well as connection types. Best configuration introducing a small amount of self-intermodulation for the high power of the ultrasonic signals is identified.

Authors: Stanczak, Dominik; Banas, Jan; Prysko, Jedrzej; Trella, Pawel; Maziewski, Przemek
Affiliation: Intel Technology Poland, Gdansk, Poland
AES Convention: 146 (March 2019) eBrief:505
Publication Date: March 10, 2019
Subject: Microphones and Circuits

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