Does ETF limit results to “anechoic” response?
First, what is “anechoic?” The word literally means “no echoes,” which in our world of audio means “no reflections.” An “anechoic chamber” to measure loudspeakers is basically a highly absorbent, virtually soundproof room or space with a measuring microphone inside. Anechoic response is only one performance parameter to consider, only the starting point. ETF provides many more useful energy, time and frequency parameters to look at. The listening room is an important element of the sound of the system. ETF does have gating options that allow the time window to stay open quite long enough to see how room response affects that anechoic speaker response. The larger time windows permit calculating room response, which is quite different from speaker response. The good news about this level of functionality in ETF is that it becomes useful for audiophiles with different goals and who wish to explore acoustics and sonic performance of their systems in different ways. Who are the audio hobbyi
