On Fri, June 24, 2016 10:06 am, james wrote: > Or you can put the speaker on (or in) the ground pointing up, and > suspend the microphone. As Will pointed out, that will not be the same as true free field response because any sound which would have radiated to the rear (typically just low frequencies with a box style speaker) will be reflected back to the front. Possibly you could compensate for it, but measurements of output vs polar angle become difficult (e.g. to measure output at -180 degrees you would have to put the speaker face down on the ground). To the original poster: don't forget to spin the speaker around and measure at various angles off axis. The frequency response of the sound which is emitted off the main listening axis and gets reflected from nearby walls has a very big influence on the perceived frequency balance of a speaker. -- Chris Caudle _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
