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ANSI/ASA S3.7 2016 Edition, August 22, 2016
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American National Standard Method for Measurement and Calibration of Earphones
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The electroacoustic test methods described in this standard are primarily for use with circumaural (overthe- ear), supra-aural (against-the-ear) and insert (ear-canal) type earphones, but may be applied to other types as well. Although these methods are generally applicable to earphones for all uses, the most common application of these methods are for earphones intended for hearing aids and audiometric testing and for receivers or other electroacoustic transducers intended for use in an earphone. In all cases, connection to the device under test is analog electrical; Digital, USB, or wireless systems are not considered. For additional requirements and tests for earphones for consumer audio applications, reference is made to IEC 60268-7.