Hey BMF, I'm on my second prototype now. I have contacted the pro of measurement (Tyll) and he gave me some good hint and tips. Here a link to one of his prototype http://www.headphone.com/rightbetweenyourears/?p=451 (see page 3) . I have bought the apps on the apps store for my iPad and have build a support the microphone ( using the USB mic that came with RockBand ). So far I'm getting weird reading from below 80 Hz. I have to contact Studio Six for ad answer. I'll post picture sometime this week if I got a successfull reading. One thing is sure it's much faster with that setup to get a FR of the headphone.
Edited by Twinster - 11/20/11 at 8:41pm