There is also a test called Quasi-anechoic. This refers to measuring the loudspeakers direct sound, before the 1st reflection. It is not conducted in an anechoic chamber but is meant to simulate such a test.
Hirsch-Houck Laboratories used to test loudspeakers in this fashion under late Julian Hirsch.
For those of you really interested in audio, I suggest reading the articles by Julian Hirsch & Ian G. Masters, very educational and engaging.
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Those who have long enjoyed such privileges as we enjoy forget in time that men died to win them.