Tag Archive for: Resources Smart Speakers

Smarter Measurements for Smart Speakers

Author: Daniel Knighten (Listen, Inc) and Glenn Hess (Indy Acoustic Research).  Reprinted from the March 2018 issue of Audio Xpress.

In this article, we describe techniques to characterize the frequency response, output level, and distortion of the device under test to enable direct comparisons between Internet of Things (IoT) smart speakers and conventional speakers.

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Challenges of IoT Smart Speaker Testing

Quantitatively measuring the audio characteristics of IoT (Internet of Things) smart speakers presents several novel challenges. We discuss overcoming the practical challenges of testing such devices and demonstrate how to measure frequency response, distortion, and other common audio characteristics. In order to make these measurements, several measurement techniques and algorithms are presented that allow us to move past the practical difficulties presented by this class of emerging audio devices. We discuss test equipment requirements, selection of test signals and especially overcoming the challenges around injecting and extracting test signals from the device.

Authors: Glenn Hess (Indy Acoustic Research) and Daniel Knighten (Listen, Inc.)
Presented at the 143rd AES Conference, New York 2017

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