I would like to get polar data for my speakers but a lot of my speakers are large so a turntable is quite impractical. Instead I would like to build a 90 degree microphone arc with 5 degree spacing (18 microphones) at a radius of 3m and use a multichannel interface to capture the sweep. This would look similar to the Dynaudio measurement chamber:
Dynaudio: inside the speaker corp's state-of-the-art measurement facility | Home Cinema Choice
it would be very expensive to purchase 18 commercial measurement microphones, however I have constructed a microphone in the past using these instructions:
System Test
the WM-60AY capsule is no longer available though. Is there a modern replacement? perhaps MEMS?
Dynaudio: inside the speaker corp's state-of-the-art measurement facility | Home Cinema Choice
it would be very expensive to purchase 18 commercial measurement microphones, however I have constructed a microphone in the past using these instructions:
System Test
the WM-60AY capsule is no longer available though. Is there a modern replacement? perhaps MEMS?
Primo has several mike capsules that can work. Some can be had for around $1. For this application you do not need anything more. however you will need 18 input mike preamp and some switching to read them all back. And some efforts both calibrating the mikes and the setup to get good results.
Please share since its an interesting concept.
Please share since its an interesting concept.
Thanks for the tips! the Primo EM258 looks to be the one to use. Yes I think I will have to write some software to do this or use REW multichannel with a 19 input interface.