• The Journal of the Acoustical Society of Korea
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• v.13 no.1E
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• pp.37-44
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• 1994

A method for measuring the loudspeaker distortions at low frequencies without an anechoic is proposed. This method is based on the fact that the n-th harmonic distortion outside the enclosure is boosted by 40log n dB compared to that inside the enclosure. The applicable frequency range is extended by cancelling the effect of standing wave inside the enclosure. Causes of measurement error are also analyzed.