Due to the increasing use of microphones in many applications such as automotive or artificial intelligence, the demand for fast and reliable microphone test processes is growing. This paper covers various aspects of the design of an end-of-line microphone test system. A prevailing challenge is to properly control the sound source, as loudspeakers have a tendency to vary their performance due to many influences. The acoustic environment for the test must provide reproducible conditions and is ideally anechoic. Noise from outside must be damped across the measurement bandwidth, so that it doesn’t affect the results. Different testing requirements for various types of microphones are shown. Different methods for defining limit criteria are discussed.

Authors: Schmidle, Gregor; Beach, Mark; MacMillan, Brian
Affiliations: NTi Audio AG, Schaan, Liechtenstein; Beach Dynamics, Cincinnati, OH, USA; NTi Audio Inc., Tigard, OR, USA(See document for exact affiliation information.)
AES Convention: 145 (October 2018) Paper Number: 10096
Publication Date: October 7, 2018
Subject: Transducers—Part 3

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